New to streetfighters looking 4 a project

[NINJAINOZ]

Hi All
New here, After many years of dirtbiking & building & helping mates build custom Harley's & toying round with a few different bikes I have been wanting to build a streetfighter for some time now, I have liked the look of the ZXR NINJA's since I was a kid

Im looking round for a cheap project to get started, I would prefer a ZX7R but will consider a ZXR750 or even a CBR or GSXR if one pops up for the right price

[stiffsimon]

G'day mate and welcome.Where about are you based?

[NINJAINOZ]

Just updated my profile, NSW NORTH COAST

[NINJAINOZ]

I have family in Sydney & Brisbane is not that far away so picking up a bike from either of them places is an option for me

[xa-mont]

wasn't someone selling a half done zx?

[BANDITROD]

yeah it was Sen and its super cheap ill find the topic and post a link

[BANDITROD]

here ya go this is a bargain
http://www.streetfighters.com.au/forum/showthread.php?23467-91-ZXR750-fighter-project-unfinished-(but-registerable)-2200

[nick76]

That would be Sen....
http://www.streetfighters.com.au/forum/showthread.php?23467-91-ZXR750-fighter-project-unfinished-(but-registerable)-2200

[nick76]

Ninja Rod.......beat me to it by a min!!

[NINJAINOZ]

Yeah that is exactly what I am looking for, Hope he still has it?

[BANDITROD]

as far as i know mate he still has it ...oh and welcome aboard

[NINJAINOZ]

Thanks 4 the welcome's

That would be a great start, Im not too keen on either of the 2 tail sections but would soon fix that, Would not take much to get it looking the way I want, I have sent him a PM so hopefully it is still for sale?

[timbo]

welcome mate great choise on a base for a project

[NINJAINOZ]

Thanks Timbo, Im guessing you have the same sort of bike?

[RevHead]

hey dude welcome ,which part of the nrt coast are you at

[NINJAINOZ]

Thanks Revhead, Im in the Coffs Harbour area, Are you around this way too?

[RevHead]

macksville bro ,close enough

[NINJAINOZ]

Yeah seems there is a few from this forum in my area

[RevHead]

timbo is in woopi ,as well ,hes a good bloke,theres a lot of guys to ride with around here ,

[NINJAINOZ]

Just gotta get some wheels though first, Hopefully something I can get rego'd straight away then I can start modifying

[RevHead]

enjoy the site many people with unreal experience on here,im building a hayabusa fighter myself.

[NINJAINOZ]

The Hayabusa fighter should be nice, Dont see too many of them naked
Do you have a build thread?
I do a bit of aluminium polishing too if you need any done sing out

[RevHead]

sorry fuc the polishing,my gsxr1100w fighter was polished,lol never again,

here you go ,,oh theres a few busa on here that are fightered
http://www.streetfighters.com.au/forum/showthread.php?23767-Revheads-Busa

[NINJAINOZ]

Yeah I know what you mean, Can be hard work maintaining it, Different grades of aluminium are totally different to polish & hold there shine totally differently too
I would not bother polishing some crap poor quality cast things but some nice billet parts are worth doing, Good quality aluminium only needs a light going over every few weeks as long as you dont ride in the dirt?

Im going for more of a blacked out look with my next project, Maybe with just a few little bits n pieces polished here & there?

[RevHead]

heres a picci of my old gsxr1100w
2377

[NINJAINOZ]

Nice, A GSXR would be my next choice if I cant get a ZXR, Pretty set on a ZXR though, I have always wanted one so its about time I got one

A Hayabusa would be next on the list if I had the dollars, Maybe one day? Yours is coming along nicely Revhead

[RevHead]

thanks man ,hurry up and buy n build so we can ride.lol

[NINJAINOZ]

Waiting to hear back from Sen?

His non reply would suggest that it has been sold already?

[Tony Nitrous]

Welcome Ninjainoz,

Im always on the look out for bikes,
will post up if I see anything that might interest you.

Tony
(Brisbane)

[NINJAINOZ]

Thanks Tony
I dont really want to spend too much to get started + I dont wanna go messing round with too nice of a bike, As long as it is not damaged or butchered I will take a basket case even
The bike Sen has is spot on but whether he still has it or not is the question
I know there is a ZXR sitting somewhere for me?

[BANDITROD]

give him time mate he will reply and im almost certain he still has it

[JDinOZ]

Uhm I was looking at these the other day: http://www.formula-xtreme.com.au/xtremema.nsf/b5c953e8e1b65e94ca256a560030b8d6/745ba6a1c55caf91ca257a590016a922?OpenDocument

(http://www.formula-xtreme.com.au/xtremema.nsf/b5c953e8e1b65e94ca256a560030b8d6/745ba6a1c55caf91ca257a590016a922?OpenDocument)

[NINJAINOZ]

Yeah probably not a bad deal JD but a bit out of my price range, He would probably have more of a chance selling them if he separated them?

Just found out Sen has sold the ZXR so I will have to keep looking round I guess

[Tony Nitrous]

Thanks Tony
I dont really want to spend too much to get started + I dont wanna go messing round with too nice of a bike, As long as it is not damaged or butchered I will take a basket case even

Do you have a rough price your limited too and
anything you really dont want to own, like Honda's.

Keep an eye on the auctions. Some of them are rideable and easy fix's.

[NINJAINOZ]

Probably not going to be able to spend much more then $2000ish (According to the missus:rolleyes:) but would prefer a bit less to get started then I can start buying some bits n pieces I want, Im not going to get a real super dooper bike for less than $2000 but I only want a project anyway for now so the less I pay for it the better in one way

I have looked through Ebay & gumtree & there is a few that look good for the price

[Tony Nitrous]

Not a problem.

There was a cosmetic damaged Bandit, looked straight to me,
started on the key and was ridden through the auctions... $1000,
I thought about it but didnt bother.

I bought an 08 GSX14 off a member for $500 more than your budget.

Do lots of research and look everywhere, there ARE bagains out there,
you've just got to be waiting and it helps if your not 100% set on a
specific model and are will to look at other options.

[NINJAINOZ]

Im pretty set on a ZXR of some kind but if a GSXR or CBR is found for the right price I may go with one of them, If only I had found Sen's ZXR earlier It would have been perfect

[TurboKat]

Welcome & congratulations on your excellent choice of bike, I currently have 4, one of which you might be interested in, it's a '95 model (the best one to go for, they use the stronger ZX9 crankcases) ZXR 750 L3.
Only done 53k kms, motor, gearbox & clutch are perfect & the bike is in overall very good condition, Vic registered until November & ready to ride so it's not really a project but the price is right.
I've just given it a big birthday & had the wheels & rearsets polished like chrome (the whole wheels, not just the outer rim), had the headers blasted & hi temp painted, replaced the fork seals & oil, the steering bearings, front & rear wheel bearings, replaced the alternator, given it a full service including all fluids, carbs balanced & valve clearances done, fitted new Arashi wave discs & replaced F & R brake pads.
The previous owner had the shock rebuilt & fitted new Michelin Pilots a couple of thousand Kms ago & it's got 80% (DID Xring) chain & sprockets.
It's 100% stock except for the dark metallic purple paintjob & the wave discs even has a Ventura rack if you want to go touring! it's got the standard fairings on so you'll be able to sell off all the stock gear to finance your STREETFIGHTER mods.
From my experience, you're better off starting with a good running, rideable bike for your STREETFIGHTER project rather than a pile of parts, or an 'unfinished project' it works out heaps cheaper & easier, this is a bit over your budget but when you consider that it's had a couple of grand worth of new parts & service work done & the fact that you have all the standard gear in good nick to sell off - it's a bargain.
I've got the rear wheel out at the moment because the rear disc is off being machined, I'll get you some pics when I get the wheel back in if you're interested.
It will pass a Roadworthy in any state. I'm looking for $3000 (comes with an aftermarket straight through muffler to put on after rego) but I'm weak when someone has a hand full of cash.

Edit; Of all the ZXRs, the L models are the ones to go for, the 91-92 J models had the wrong rear suspension linkage ratio so they dragged their arse around corners, also the L engine is based on the J model's Racekit so Ls have something like 20 HP more than the Js. :p

[LKC73]

Ninja, Welcome mate and so happens I have a 94 GSXR 750 sitting in the garage as a incompleted project be happy to part with it if your interested. PM if you are.

[Bob]

Welcome mate.

[timbo]

Thanks Timbo, Im guessing you have the same sort of bike?
Yes mate i have a 93 zxr amd as Pete said im up in Woopi but work in and around Coffs so we might have to do beer at some point and talk bikes and shit

[EVLZX]

Edit; Of all the ZXRs, the L models are the ones to go for

+1

& Welcome

[NINJAINOZ]

Bourbon sounds better but talking bikes n shit sounds good too, Will hopefully get a new project bike for meself first

[RevHead]

wild turkey 101 sounds even better

[Tony Nitrous]

If your up in Brissy,
Coke Zero (they wont let me near alcohol)
and i'll show what proper bikes look like.

[sharky]

and i'll show what proper bikes look like.
Didn't know you had a Yamaha ??:)

[Jed]

If your up in Brissy,
Coke Zero (they wont let me near alcohol)
and i'll show what proper bikes look like.

Did you buy a Kwaka?

[Tony Nitrous]

Had Yam's and Kwaks when I was young and foolish,
Worked my way up the ladder a bit since then though.

http://img443.imageshack.us/img443/7445/nanax.gif (http://imageshack.us/photo/my-images/443/nanax.gif/)

[EVLZX]

I'm proud to say I've never owned a Yamaha :D

[sharky]

So what youre saying Tony is suzukis are for old farts :)

[Tony Nitrous]

Naaaa.... your just need more experience to handle the performance ...;)

Thinking about it, I had my Yam BEFORE I had my Harley,
so I stand by my claim I was working my way up the ladder.....http://img443.imageshack.us/img443/7445/nanax.gif (http://imageshack.us/photo/my-images/443/nanax.gif/)

[NINJAINOZ]

I looked at a ZX7R I found locally today, It has been sitting for a while & has been neglected a bit before it was sitting by the look of it but the price is not too bad to get me started + it is local so that means less stuffing round to get started
Just hope it is not too far gone? Is there any real problem areas to look at when checking out the early ZX7R's? Are the gearbox's prone to problems? I should maybe give it a quick squirt just to make sure all the gears are good?

Runs OK & the fairings are pretty well stuffed so its a good start for what I need

[pav69]

depending on how good the price is look at carbs they tend to seize up if sat for to long

[sharky]

Ah.....I see mate...


I thought you had to wait til ya sight was going to think a burgerking was a good looking boik

[Tony Nitrous]

Ah.....I see mate...
I thought you had to wait til ya sight was going to think a burgerking was a good looking boik

Naaa, you just realise one day that alloy frames, 160+hp motors, radial brakes,
fuel injection, 6" rim's etc are bloody excellent fun, and the only thing better
than kicking someone's arse is doing it on an ugly bike they hate.......;)

[NINJAINOZ]

Looks like I might have a bit of a ZX7R project to pick up on Friday hopefully? It needs a good tidy up but I will enjoy getting to know the bike as I go along anyway, It will be naked pretty quickly because the fairing is fairly buggered anyway, Hopefully I will have some pics on the weekend after I give it a quick clean up & see what needs to be done, If anyone has any parts laying round that you think I may need let me know what you have & how much?
Thanks for all the welcome's & help so far

[NINJAINOZ]

This will help me out a bit too>

http://www.4shared.com/document/xlolkR7O/Service_Manual_ZX7R_Ninja_1996.html

Anyone looking for the earlier ZXR manual here ya go>

http://www.manualedereparatie.info/en/download/kawasaki-zxr-750-1989-1996-Service-manual.html

Im sure they have probably been shared here before but they will help someone else out

[NINJAINOZ]

Turns out the 97 ZX7R Bike I was looking at buying is actually a 94 ZXR750 which I dont mind cause for some reason I actually like the earlier models better

I was checking out this site/page (below) & im guessing it is a ZXR 750 L2, Would that be correct?
http://homepage.ntlworld.com/webzxr/zxr750r/index.html
Considering it is now in my shed & can anyone tell me the ins & outs (good & bad) of this model

I have turfed the fairing & started cleaning it & removing the crap paint from the wheels, Needs a few odds & ends & a good tune up but Im happy to have the bike I have always wanted even know it needs some work
I will start with all the basics, Plugs, fuel filters oil change etc etc then look at the carbs & see what I can sort out? It seems like it may have a leak on the intake, Im thinking maybe the carb rubber mounts are stuffed? It does not seem to drop the revs real quick, May also be some jets blocked in the carbs?

I will have to start a build thread when I get it tidied up a bit more

[pav69]

i clean mine every 12 months because they have a habit of blocking up a bit no matter what filters i seem to use make sure you clean the emolshen tubes real good makes a shit load of difference .

[Jed]

Well done on your purchase. Can't go wrong with the old ZXR. If you need any bits and pieces, let me know. I have a box full of stuff I took off mine.

Keep your eyes open for a 9 motor. best mod ever

Get some pics up.

Cheers, Jed

[TurboKat]

can anyone tell me the ins & outs (good & bad) of this model

Yep, the bad is that it's a 750, the good is that 900 motors are an easy swap... you're welcome.

[timbo]

Yep the 9 motor is a great thing. Just think of all the money you will save on front tyres

[EVLZX]

Just curious the Z1000 being based on the 9 is it possible to fit the early ones to the ZXR or are the mounts all completely different?

[timbo]

as far as i know they are compleatly differant just like a c zx9 moter wont go into an early ZXR

[EVLZX]

Too bad the fuel injection was all the 9 ever needed.

[NINJAINOZ]

Gave it an oil change & cleaned the carbs out today It was gummed up as Pav69 mentioned, Got it all back together & it is running a bit better, Still not quite dropping back down to idle like it should though
Following the guide in the link below I removed the air valve setup
http://www.zxforums.com/forums/zx-7r-forum/55912-new-bikes-zx7-has-major-issues-help.html

A 900 motor would be nice one day, How far can the 750 motor be bored out without any major troubles? I will need to drop the motor out for a bit of paint & thought I may as well have a look around for a rebuild kit with oversize pistons etc & give it a bit of a freshen up, Where is a good place to look? I could not find anything on Ebay

I started to polish up the frame on one side, Its really not nice to look at just yet but it is getting there, Anyone have a guide/link to show where I can route the wiring to tidy it up

[EVLZX]

http://www.ebay.com.au/sch/i.html?rt=nc&LH_PrefLoc=2&_nkw=zx7%20je&_fln=1&_sc=1&_sop=15&_sticky=1&_trksid=p3286.c0.m283

[NINJAINOZ]

Thanks for the link, The pistons are not cheap either but a new motor is wort it

I went to change the plus yesterday & found out the 5/8" / 16mm plug socket out of my socket set does not fit down the plug hole so I thought I would have to hunt up the correct plug socket, I looked in my tool box draw where I knew there was some plug soxkets & happened to find a plug socket that looks identical to the OEM Kawasaki one 92110-1154 (http://www.motosport.com/motorcycle/oem-parts/KAWASAKI/1994/NINJA-ZX_7/OWNER'S-TOOLS/TOOL_WRENCH%2CBOX%2C16MM/92110-1154)
http://www.motosport.com/motorcycle/oem-parts/KAWASAKI/1994/NINJA-ZX_7/OWNER'S-TOOLS

[Yella]

Leave the motor, stick on a turbo cant go wrong :cool:

[EVLZX]

lol

[NINJAINOZ]

I would prefer a fresh motor at this stage

Thought I would show ya's where im up to now, The first pic is actually when the last owner bought it so it was a bit rougher looking than the first pic


I have removed the fairings & painted the front guard satin black
Started polishing the frame & removed the bodgy paint of the lip of the rims & started to polish them also
To keep the cost down for now I will be painting it satin black with some cans & polishing whatever else, Just need to decide what to paint & what to polish? Either way the motor will be black & I like the look of the black frame & maybe swingarm also but I would have to strip it all down completely to do that, Maybe later on one day?

Not looking at nothing major yet in regards to modifications like changing the tail
Going to concentrate on getting it cleaned up for starters (Seems to be a light layer of greasy crap all over it?) & maybe a freshen up of the motor soon after I collect some parts to do so

I just wanted to ask a few more questions
1 Can I legally run the bike on the road without the rear tyre hugger considering it has part of the chain guard built in would it be a no no to remove it?
2 Would a bike still pass a blue slip after modifying or changing the tail & also how do most streetfighter bikes go with getting a blue slip with the fairing removed & top clamp drilled & bar mounts fitted? Any issues? I spose it really depends who does the blue slip too

Finishing off the aluminium with 1200 really gets it glowing

2422

2423

[timbo]

Have you been taking photography lessons from Revhead Pete?

[NINJAINOZ]

You mean the lack of light (yeah it was getting dark) or the way they have been uploaded?

The pics are just over 1mb but when I uploaded them they ended up being 90 odd KB? WTF?

Plus the first pic of the bike would only upload as an attachment?

I can see the pics in the thread here but when I click on the pics it says I cannot view them ofcourse because I am not a full member, Thought I could at least view my own pics in my posts when im not a full member?

[timbo]

It's all good mate, I dont know how the photo's would work on different levels of membership, I am sure other members would be able to help with that one. As for the hugger, you dont need a hugger for the blue slip but you will need a chain guard. Not to sure about the other stuff, as all my bike is still registered in victoria and passed without a problem with a drill top yoke and no tuperware.

[NINJAINOZ]

What size do the pics show up for you?

I might drop the hugger off for now which will enable a bit more cleaning to be done, I can always put it back on if I need to

[NINJAINOZ]

I trimmed off the rear guard number plate holder bit so it looks smooth at the back now, I will make up a mount for the number plate & blinkers out of aluminium & maybe leave it a bit long to get it on the road (Blue slip) then trim it off after

Been reading your ZXR take 2 thread Timbo, What happened to that bike?
http://www.streetfighters.com.au/forum/showthread.php?13026-ZXR-take-2
I think I might go with the black on the frame & swingarm, May as well do it the way I want from the start rather than stuffing round polishing then painting later, I will be polishing up a few bits here & there though to break it up & make it a bit different

[Yella]

You can do a top end freshen up for $400ish using your old pistons with new rings. I got my bits for partshark easy to use cheap and quick. Once you have the parts you can knock it over in a day if you head is good.

[NINJAINOZ]

I will probably do the bottom end as well, The Partsshark site looks pretty good, I use Motosport to look up part numbers usually

[Jed]

Looking good. Once you start you won't be able to stop now.

Cut your can in half as well.

[NINJAINOZ]

Yeah just getting started, I would like to find a different muffler setup, I would like to find another rear pipe section also if anyone has one laying round let me know, I will fit a better (Shorter) muffler & keep the other one for getting it rego'd

[EVLZX]

I will probably do the bottom end as well, The Partsshark site looks pretty good, I use Motosport to look up part numbers usually

Motosport really inflates their prices, just in case anyone was thinking of shopping there, also have to wait about a week b4 they actually ship.
http://www.powersportsplus.com (http://www.powersportsplus.com/) good prices.

[NINJAINOZ]

Yeah I have never bought stuff from them I just use the site to look up parts really
Is there any company's doing mild/performance cams for the ZXR 750's?

Picked up a spare set of carby's for $50 (delivered) I will get some FCR's one day maybe?

I removed the lovely short foam grips and took the top triple clamp (Yoke?) off getting it ready to drill, Need to hunt up some bar mounts first, I happen to have a new set of cheap dirt bike fatbars in the shed that I can use to get all the controls back on & measure up the front brake hose

[EVLZX]

Maybe zx9 cams will fit?
Kawasaki's are pretty good in that way.

[timbo]

pm sent

[NINJAINOZ]

Thanks Timbo

I received another set of carbys & some fatbar mounts today, I pulled apart the carby's & they look much better inside & out so I took them apart & cleaned them out & will fit them up tomorrow

I tried a different way to fit the bar mounts, Rather than removing any material from the triple clamp & possibly weakening it, After taking lots of measurements & marking it out on the top I drilled pretty much in the middle of the front recess on the triple clamp (In front of the gusset) then cut some 15mm thick flat aluminium into 1" x 1" pieces & carved them out so they fit VERY snug, Then drilled the 10mm holes through the spacers & wulla
I will have the spacers underneath welded in later on but I reckon they would be fine to run as is

I have a new UNI oem style air filter, A few snazzy little fuel filters, Some Chinesee levers (How crap are they?)
Going to start collecting some engine parts very soon

Anyone using the HEL brake hoses? They look OK for the price

Guess I should start a build thread?

[pav69]

no need for welding in extra material under clamp mine is a couple of years old & countless wheelies & they are still perfect grab some zx9 levers & masters tidys up the bars heaps you will need to go about 50mm longer on front brake lines & clutch throttle cables fit if u feed them through right hand side of frame ,go 4 a k&n filter if u can they are better & u will need to re-jet it will run rich if u come across any other hassles call me as i have same model & these guys have helped me sort out heaps of stuff over time cheers steve 0414957265.

[NINJAINOZ]

Pav89, You reckon the spacer blocks I have made up will be fine as they are? Im pretty confident they will work fine as is but I am possibly powder coating the triple clamp (& frame etc etc) & thought it would make it easier for the powder coaters + it would look a bit tidier & a bit less like it has been modified

I have some bars sitting on there that I had sitting in the shed but they are way too tall
Im about to order some Fly Aero SX bend (Gunmetal, Almost black) or Tag RC bend (Black) fat bars, These are pretty much the lowest bars in the dirt bike range that come in the colours I want without colourful looking brand names on them

I have read somewhere that you can get away with stock length cables if the bars are low enough? Where would I get slightly longer throttle & choke cables? I can sort out the brake & clutch hoses easily with HEL lines, I called them the other day & had a chat

I thought if I ran a more free flowing filter like the K&N it would run lean due to the extra air flow? Im sure I read somewhere the exact same thing but they had to jet it up because it was lean, I got the (OEM style, Not pods) UNI filter cause it was $34 delivered all the way from the USA

[NINJAINOZ]

I have been looking at some options with the exhaust, My header pipe finishes just under the right footpeg / brake lever then has a rear pipe that slips over the header then connects to the muffler with a 3-bolt flange, The muffler for some reason is a 6 bolt flange setup? Im guessing someone has fitted a ZX9R header (The header has no balance pipe which makes it confusing?) & made up the rear pipe section & adapted some other possibly larger ID muffler?

I thought the stock header for my bike would have finished at the muffler with a 3-bolt flange?

Im seriously thinking about getting rid of the header & starting again with a new header pipe, A ZX9R 94-97 header pipe will fit from what I have found/read
If I could get away with a nice muffler & rear pipe to fit my header that would be even better for now

If I were to fit a new ZX9 header would a ZX9 rear pipe section & muffler bolt on?

Anyone used one of these before?>
http://www.ebay.com.au/itm/GP-Carbon-Exhaust-Kawasaki-ZX9R-Ninja-94-97-ZX-9R-1994-1997-EX344-/230762035142?pt=AU_Motorcycle_Parts_Accessories&hash=item35ba7d37c6

I may get away with fitting one of them on my header pipe, That would be nice & easy

[pav69]

i have zx9 headers and made the tailpipe at work the stock headers do finish at the muffler with a 3 bolt flange

[NINJAINOZ]

I looked at the pic of your red & black bike to compare the header pipes, Im guessing you have ZX9 headers on the red & black bike?

Mine seems to finish further back, Im thinking it maybe a stock ZXR 750 system that has been chopped & a piece of pipe welded on just under the footpeg to allow the rear link pipe (that is also made up) to clamp on?
I think I am just going to get another set of headers & start again
Might have to go with a set of Delkevic headers?

I decided to go with a set of FLY AERO TAPERED SX bend bars, Only available in gunmetal finish (Or silver) but they will look nice, For $82 delivered I wont complain

[NINJAINOZ]

Can anyone tell me if the Delkevic headers have a baffle type perforated tube inside the header the same as my stock header in the pic? They state that in the advertising that they are made to OE specs but surely they dont put that crap in there?>

[pav69]

i have a stock 7 headers & muffler here if u want it muffler is aftermarket jobby but u would have to weld around the collector were it is 4-1 and piece together 1 out of 2 exhausts the pipe sounds sweet ,reason u would have 2 weld it is i stole the down pipes 2 make turbo manifold 4 it but its there if u want it.

[NINJAINOZ]

What brand is the muffler?

[pav69]

it has wicked exhaust written on it

[TurboKat]

go 4 a k&n filter if u can they are better

THEY ARE SHIT !!
Fact - the K&N replacement air filter for the ZXR 750 L has 25% less surface area than the OEM Kawasaki filter, it will actually reduce the amount of air available to the carbs at high RPM and COST you power.
Too many people blindly believe what they read in magazines or on the internet - that a K&N, BMC, UNI or whatever filter will increase power - in 99% of cases, it won't.
Think - Why would a Motorcycle Manufacturer spend money developing an air filter that restricted airflow & reduced power? The answer is, they wouldn't, that's why the only reason to buy an aftermarket filter is if they're cheaper than OEM.

[NINJAINOZ]

Yeah I dont really see what the hype is all about with them (K&N), I went with the OEM style UNI filter for the exact same reason you mentioned (Price, $34 delivered) + I have run them in a few different bikes & im pretty happy with them

@Pav69, Can you get me a pic or 2 & how much would the muffler weigh roughly? Might be a bit pricey to send but the price is good

[EVLZX]

Nvm

[NINJAINOZ]

Yeah the BMC filters are much like the K&N that restrict the flow down to a smaller section, They may still flow alright but I will go with the UNI filter & save $50 odd for now

BMC>
2495

[xa-mont]

don't they actually flow freer though? like more CFM per M2 of surface?

[NINJAINOZ]

Yeah possibly but I will save the $50 incase it is just part of their sales jargon, No one can really say if any of these filters flow better by testing the actual flow of each filter, The only other way would be to do dyno runs with different filters to compare, Then there is many other variables, Some bikes would be tuned/jetted better for different filters maybe?