Yella's Drag Busa

[BANDITROD]

id say it would be closer to 30mm travel as it wont go all the way down to the bottom of the fork

[Redmohawk]

Why is a strap better than internally lowering them? Not having a shot just haven't seen a reason it is better, most things say that lowering internal is the better option.
As I have done now I still have a percentage of travel in the suspension to absorb bump's and assist with brakeing

I think Mega ment use a strap on stock length to increase travel, I think he ment "not enough travel left in the forks" as you have it set currently. Me I have no idea,but I'm sure you'll work it out. Plenty seem to be running ok that low.

[megawatt]

The drag guys in the UK all use straps, especially on the road legal bikes. It allows adjustment, if you do bottom out , you can give it a bit less strap and a bit more fork.

[Yella]

As you may have read earlier Im lowering the forks with spacers. Armed with a small about of info and enough tools to be dangerous I went to the shed. Took some pic's while doing the job.
7035
Free length

7036
Action shot :)

7037
Cartridge out the work bench/ milk crate

7038
end bit off

7039
Knocked up a quick spring compressor. rough but works :)

7040
Lower spacer on, cutting upper


7041

Shorter

7042

Not the same

7043
Need better pic's but you get the idea.

It has 85mm ground clearance at the lowest point static sag, once my fat butt is on it, Im not sure but probably closer to 60mm. Thinking I will pull them apart again and swap the 70mm spacers for 50mm and put the standard top length spacers in to up the preload. To give it a bit more travel and clearance just to be on the safe side then if I need it lower I can drop the fork through a little. Also looking at running ATF at the stock level :).

[RevHead]

fark yeah/ now its down ,good work Ian.

[Yella]

https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-ash3/841220_337958126320891_436213536_o.jpg

Still need to lower the rear some more and set the sag

https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-snc6/705977_337957826320921_419065914_o.jpg

Took it for a quick run, a couple of hardish starts and hard breaking and everthing seemed to be OK. Will take it to work on the weekend and try a couple of hard starts/ wheelies and see what hits :)

[BANDITROD]

looking good mate and yeah the rear def needs to drop a bit have you had someone help you check how much it drops while you are sitting on it

[Yella]

Yep with the additional preload in the forks, comp set at max and the heavier fork oil with me on it I still have over 70mm before the headers hit the ground. So once I drop the back a little more still should have room.

[BANDITROD]

shit hot well done mate

[RevHead]

thinking about bones almost 12 oclock launch at heathcoate ,you should be ablle to hold the front down for a few hard starts ,as your regearing it it should get most of its torque down in 3rd and 4th

[hyofighter]

looking good yella , just needs a bright paint job stupid wide back wheel and one disk removed from the front and your ready for a centrefold of superstreetbike :p

[Yella]

It will be off to Pav for a splash of Yellow soon enough :)

[Deano]

Good stuff mate well done

[megawatt]

When you lower the rear of the bike, increase the compression damping and preload so that the back sits down on launch, but only moves about 1/2" . This will allow the tyre to bite without breaking away and will reduce wheelies. I did it with Z650 shocks fitted with alloy spacers and valve springs fitted by removing the top of the shocks, sliding over the damper rod and refitting the shock tops. Not sure you can do this with asingle shock though.

[Yella]

Think I know what you mean, I will have a look at the options when I get home today

[Yella]

Lowered the back more today
https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-ash3/844012_340519559398081_839266948_o.jpg

https://fbcdn-sphotos-b-a.akamaihd.net/hphotos-ak-ash3/792196_340519542731416_1957476298_o.jpg

[BANDITROD]

thats looking better mate good job

[Yella]

Had a quick test pretty happy all seem good. The kid on the pushy up the road got a shock. I rolled to a stop casue him and his mates had spread out over the road as they got out the way he yelled out "dump it I dare ya" being not one to shy away from a random request quick rev and out with the clutch. At this height with a cold tyre it leaves a line about 20m long up the road. Dunno who was more shocked him or me. This should be fun out on the track

[megawatt]

That's lookin a lot more like a drag bike now.

[El_Hefty]

like it Yella coming along real nice

[RevHead]

Had a quick test pretty happy all seem good. The kid on the pushy up the road got a shock. I rolled to a stop casue him and his mates had spread out over the road as they got out the way he yelled out "dump it I dare ya" being not one to shy away from a random request quick rev and out with the clutch. At this height with a cold tyre it leaves a line about 20m long up the road. Dunno who was more shocked him or me. This should be fun out on the track

there great fun ,and the power is a nice blend of fuck yeah and blurr!

[Bob]

Coming along great mate. Top stuff

[Yella]

Got this on ebay today for $80
https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-snc7/600734_346649925451711_1057195664_n.jpg

[RevHead]

i was looking at that about 1 hour ago

[Yella]

couldn't pass it up for the price

[RevHead]

was fucking cheap

[Yella]

I thought it would go for more only put a low bid on and got it so happy as now just gotta find the cash LOL

[Yella]

Pav is playing with the paint and repair of items, damaged head light all the weight has been removed and he has repaired the broken bits and thrown some paint at it
https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-prn1/35445_348374278612609_878453986_n.jpg

Dunno what it is with me but seems everytime I get a project all my cash runs away so things are moving slowly, tomorrow will see me fixing a couple of random oil leaks and that is all for now. SO no real updates :(

[wackyrider]

Money??? What's money? I hear about it, yet it's gone before I see it

[rod185651]

Looks like a drag bike now mate, I will have to pay you a visit, in a month or so. Might need some of your expertise in trade for a donation to your drag bike fund.

[Yella]

Your welcome round anytime Rod

[Yella]

Fixing oil leak's and found this
70447045



Now what to do bodgy fix or get a new one Im leaning toward bodgy

and the heart of the beast

7046

[Redmohawk]

Tig it up

[Yella]

Yeh being Mag not sure how it will go and finding soemone will be a issue. Still leaning toward bodgy fix

[xa-mont]

like i said on facey. 2 part metal epoxy. bodge done!

[Yella]

Looking to see what I can get. I fixed a similar problem on a forklift with soem ultra blue still going strong 3 years on

[Yella]

New nose thanks to Stu

7047

Should be able to get out of the wind with the screen :)

[Yella]

Fitting the clutch mod
70487049
Stock

Swapping bits



The Brocks clutch mod is a fair bit lighter than the 2 peices it replaces and was really easy to fit up happy as.

Rocker cover has been repaired ( ultra blue) and refitted.

16 tooth front sprocket fitted.
Now just waiting for the rain to stop to see how it goes.

Picking up a power commander on monday aswell.

[MattyDucati]

So what's with the clutch mod? Just lighter?

[Redmohawk]

Deletes slipper action I'd bet

[Tony Nitrous]

Removes the Back Torque Limiter.
Some Suzuki's are OK, don't notice it on the GSX14,
Gen2 Busa and B-Kings can be bloody awful.
Can't get a smooth launch at high rev's and will take
more abuse than the stock system.

[Yella]

Yep as said it removes the Back Torque Limiter and is lighter.
I could get one good smooth launch in stock form next time I would try it would chatter/skip causing the bike to jump around. It was really bad to be honest I dont know if I could have even riden it on the road like that being as Im a massive trafffic light hero

[Yella]

OK took it for a quick spin today everything seems sweet now :). All thats left now is plastic's painted, seat and fit PC unit then its off racing. Can not wait keen to see what it does then work on getting me fast

[Yella]

Fitted a power commander IIIr today. It's was programmed for same set up as mine by the previous owner, plugged it in fired it up and it seemd to run sweet going by the exhaust smoke its running a bit richer now LOL.

Also swapped out the 2 long velocity stacks for 2 more shorts.
705070517052

[El_Hefty]

so its race time?

[Yella]

Just paint and seat to go

[Yella]

When I said paint and seat to go I maybe forgot some stuff :)
7053
Must go :)

7054
Restrictor in

7055
restrictor out

7056
BXP block off plates thanks to Stu after he did not use them.

All done. Also removed the pairs crap from the front of the motor. Still have braided front lines to fit tonight. Pav is all but finshed with the paint so will pick them up next week.
Next Sunday is a street meet to test it out and the following week is the first outting in the new race class at WSID

[Yella]

SEAT PORN

7057

Massive thanks to Kev

[Yella]

Paint is coming along :)
7058

[kev@vcm]

SEAT PORN

https://fbcdn-sphotos-b-a.akamaihd.net/hphotos-ak-ash4/317716_358164857633551_330648805_n.jpg

Massive thanks to Kev

Glad you love it mate , really enjoyed making this seat for ya

[Yella]

7059

Black on Black

[kev@vcm]

wheres the yellow and red the seat wont math at all dude

[Yella]

It will all match sweet. One it's running and I have a little more time it will get a splash of colour

[pav69]

it was a quick coat of paint to get the beast racing kev as the repairs are done it wont take much to add colour

[kev@vcm]

Yeah true true , I have a drag bike now as well that's 3 busa's lol it will need a paint job soon as the fairings are all scratched up as hell Pav so will sling that your way ,

[Yella]

https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-ash3/531492_360883904028313_570177764_n.jpg

https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-ash3/576023_360883677361669_1697361971_n.jpg

[Yella]

https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-snc7/576168_360884360694934_1419664713_n.jpg

[kev@vcm]

Fucking porn dude really stoked for ya mate seat looks good

[Yella]

LOVING IT. But I remember why I hate fairings LOL stupid plastic's

[wackyrider]

Looking good mate

[rod185651]

Looks good mate, The yellow trim on the seat matches your tool boxes and race stand nicely :cool:

[Yella]

https://fbcdn-sphotos-f-a.akamaihd.net/hphotos-ak-ash3/p206x206/599170_361453453971358_631118020_n.jpg

Fully dressed and ready to go

[Yella]

Final Pic's before it goes racing tomorrow
https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-ash3/64760_361891017260935_1526530810_n.jpg

https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-snc7/295666_361891057260931_454129768_n.jpg

https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-snc7/479836_361892297260807_1289700483_n.jpg

https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-snc6/269238_361892230594147_423221832_n.jpg

https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-prn1/601377_361891813927522_966575146_n.jpg

https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-prn1/45444_361892100594160_1515288585_n.jpg

Seat by VCM. Thansk KEV

Paint by SJP Moto paint Thanks Pav

[El_Hefty]

looks great with that stance....

cheap and very capable drag bike in the end

[xa-mont]

Looks mad chief!

Very menacing!

[Yella]

Thank's fella's I like it should be a heap of fun and at the right price

[Yella]

https://fbcdn-sphotos-h-a.akamaihd.net/hphotos-ak-prn1/72356_361891290594241_1575727746_n.jpg

https://fbcdn-sphotos-b-a.akamaihd.net/hphotos-ak-ash3/72390_361891853927518_847063086_n.jpg

a couple more

[Yella]

https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-ash3/531755_362269710556399_1752633726_n.jpg

So first day out and all went wellish.
Best for the day a 10.4 so happy with the shake down run's, heaps more in it, bike pulled well all the way to redline but need to kill the 60ft
The good:
Big burn outs
Suspension is set perfect bike doesn't lift or jump around just sits low and goes
Bike rides straight
Bike pull's hard all the way to redline every gear better than the other stock busa at the track today managed to chase him down for the win :)

The Bad:
Bike needs new fuel lines, spilt return line dodged it up to keep going
The CLUTCH is SHIT even with the Brock's clutch mod it chatters and bites like fuck. No way I can get any good launchs

All in all not bad

https://fbcdn-sphotos-h-a.akamaihd.net/hphotos-ak-frc1/p206x206/734630_362395390543831_1526823984_n.jpg Bad pic but you get the idea

[StuNVA]

Well done. Sub 7 1/8th is good, is the top speed what you were expecting ?

Best 1/8th I screwed out of mine all weekend was 7.2 / 1.9-60'. 175ks, traction was the issue, until this afternoon (plenty of rubber down), when I promptly got done in the first elimination..... -_-

[megawatt]

Well done Yella. Lots more to come.

[Yella]

Top Speed is close. The launch problem is massive gunna pull it down this week and see what I can see. Will be checking the clutch basket backing plate and spring pressure.
Question's are:
Is the brock's cushion kit the answer? Will it stop the chatter?
Should I get a clutch slave brace aswell?
Or
Should I be looking for something else??

[Jed]

Well done Yella. Good times for you first run with it. And the bike looks great.

Is this the motor you got off Pete? That he was basically throwing out? If so great and cheap fun

[Yella]

Yep it's Pete's old motor and the rest is the stat write off he purchased to get a new motor

[stiffsimon]

Is this the motor you got off Pete? That he was basically throwing out? If so great and cheap fun

You took the words right out of my mouth.Bike's looking good and running good by the look of it.

[TurboKat]

The Blackbirds have a similar problem with the clutch Ian, the dragsters on the BB forum say to pull the first (inner) steel plate out & take all the inner teeth off it & put it back in, I haven't done it to mine yet but they say it smooths the launch right out with no adverse affects like slippage.
Might be worth a try on the 'Bus, quick, cheap & easy.
BTW, That bike looks tough as nails.

[Yella]

Thanks fella's.
TK I had not heard of that but will give it a try

[Yella]

https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-ash4/402662_363727043743999_404476725_n.jpg

https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-ash4/388503_363727150410655_49642917_n.jpg

https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-prn1/562814_363727053743998_419502452_n.jpg

Sample pic's from the weekend

[Yella]

So pulled it down everything looks sweet except
http://www.dragbike.com/dbnews/articlefiles/11_0926_4.jpg
Obviously not my pic but the same problem,
Next question is stock motor so do I run new stock basket or go for something different.
I have heard that the stock is good for 220ish HP and a fair bit of abuse so it should be good with stock for atleast a season soem are saying about 3 years but will depend on abuse level. Or do I spend the coin on a billet unit?

[xa-mont]

i say spend the coin. the bike is going to cop full abuse, so you may as well make it suit from the start.

[StuNVA]

Yeah, it'll only break at the worst time, you know how it is.

[Redmohawk]

Go full tilt now, then when you turbo and you know you will upgrade spring/drag centrifical and away you go.

[MattyDucati]

Here here, id spend the coin mate. you know you'll turbo it sooner or later, a good clutch can make a good drag bike!

[megawatt]

Spend money on sorting the clutch NOW! before it breaks. If the clutch is ruining your launches, sort it out and learn to ride the bike as it is.
The terminal speed seems a bit low to me? Not having a go at you and I don't know what terminals Busas normally run , but I was running 137s with a stock 998 Katana motor in 1983!!! It's a great start though.

[Yella]

http://www.youtube.com/watch?feature=player_detailpage&v=Sz1UTiIX1B0

https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-ash3/5470_364119790371391_1116811428_n.jpg

https://fbcdn-sphotos-f-a.akamaihd.net/hphotos-ak-prn1/602855_364119717038065_1858204997_n.jpg

Measured up all the fibres they are like new, the steels are flat a couple of small marks but nothing to worry about. The inner and outer hubs have some marks but again not enough to worry about. In the vid you can see the movement of the springs
May look into getting the stock 02 clutch cushion when it goes back together.

http://img.photobucket.com/albums/v166/Gixx1300R/IMAG1298_zps13bfcb3b.jpg








(http://img.photobucket.com/albums/v166/Gixx1300R/IMAG1298_zps13bfcb3b.jpg)

[StuNVA]

On the second last picture on the lower right, is that burred over ?

[Yella]

Nar the marks are only very small dents not enough to worry about I dont think

[megawatt]

Dunno what standard Busa mods are, but my GSX has stiffer springs, but in a thick billet backplate. Rivets are welded. The basket seems ok as long as frictions can slide over any indentations .
http://i145.photobucket.com/albums/r240/megawattblade/All%20bike%20pix/GSX1100%20project/IMAG1268.jpg

[Yella]

Yeh, Im trying to work out how to replace the springs myself. Thinking if I drill the rivet to remove the plate then get new springs and weld the rivets, can't hurt to try :)

[megawatt]

Yeah , that's how to split it, but you will probs need new rivets with a very high shear strength. The standard GSX backplates can crack at the stress raising corners where the springs sit. That's why billet ones are better and thicker.

[DCRacing]

Where would you get new rivets from? I sort of went down this path but was trying to get the late model gsxr slipper clutch into the old oil cooled motor. Got as far as drilling the rivets but not putting it all back together.

[Redmohawk]

Grade 10 or 12 bolts ? Maybe ?

[DCRacing]

Yeah sort of thought about them, just was a bit nervous of using them. Had thought about getting some turned up and then trying to peen them over, but maybe just welding them might be the go.
Sorry for the hijack of thread Yella.

[TonyOW31]

Where would you get new rivets from?

Just turn some up?

[Redmohawk]

I wouldnt weld or peen them , hardness / grading will be out to shit with both methods. I'd get button/mushroom head with hex drive in say 8mm grade 10 . The mushroom head will be about the same depth and a peened rivet or welded (prob about the same depth of the spring protrusion through stock plate)

On the inside I'd machine graded nuts with a taper and back bore same taper into basket. A nut with a depth of say 5 mm you'd prob be able to get the nuts down into the basket enough to allow it all to fit. Without measuring its all guess work , but I cant see why it wouldnt work. A little locktight, and if your real keen maybe a centre punch on the the thread.

Your only going to have 1.5 or 2 mm of nut to do the sucker up but if you grind a socket just for the job it should do up fine without eating the nut or socket. Bonus is you can now swap springs at will , or even expreament with a solid (un sprung setup)

[DCRacing]

If you did it that way the whole thing would be locked as the drive plate needs to have that bit of movement on the basket, which is the issue Yella was having........ i think.
would probably work if the nut was on the drive plate and the button head inside the basket, and ground down.........
will have to dig it out and have a look.

[Redmohawk]

Sorry was thinking out loud so to speek,

I was under the impression there are 3 pieces , one drive floating on springs (Normally riveted with a stepped rivet, instead Bolt to second plate with tube spacer to set correct gap). Second riv to basket to capture springs (Hard bolt second to basket). So 6 bolts in total, 3 with tube spacers.

[El_Hefty]

Or rather than go through to much shit, they are basically the same as whats used on car clutch plates, talk to someone like Doug at NPC who make custom clutch plates for performance cars buy some rivets off of him

http://www.npcperformance.com.au/

[Yella]

We need a like button. That sounds a heap easier. Anyway will pull it apart tomorrow

[Yella]

So thinking while waiting for me to get my act together and sort the clutch, Im thinking I will remove the crank balance shaft any one done this?? Looks easy enough not going to get a dummy shaft just going to seal the hole in the stock shaft. Thats a thought does Ben do dummy balance shafts for Busa's

http://www.hayabusazone.com/resources/balancer/busabalacncer.jpg

[EXBEN]

Gimme some sizes & I'll knock one up.