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View Full Version : Aircooled GSX Bigbore Question



ozkat
12-01-2006, 07:47 PM
Any Aircooled gurus here? 1074cc standard block, how far can it be bored safely? again with new sleeves? what about big block kits? Do the EFE barrels fit the standard 1074 crankcases? i know you can fit the oilcooled heads to the GSX topend with a few mods. ill be looking for a few hp mods in the future , so im just seeing who knows what.

12-01-2006, 08:04 PM
EFE barrels fit for an 1135 cc upgrade, the maximum is about 1170-1190 cc's on the standard block, either 1074/1135, after that you're into re-sleeving, I believe, up to ~1275 cc MAX.

I was on the BigCC site the other night, and they list the upgrade options that they do, plus the expected horse power outputs.

http://www.bigccracing.com/welcome.asp?page=40

Been thinking about the 140-150 bhp ZZR1100 option (stage 2) for the 9. Not too expensive, and enough power to blow the doors off most things.

http://www.bigccracing.com/welcome.asp?page=44

ozkat
12-01-2006, 08:22 PM
So the standard 1074cc barrels can be taken out to 1170cc? sounds good. i like the 1275cc with resleeving tho.

12-01-2006, 08:25 PM
That gives a very very toey motor, with the right cams. Huuuuge gruunt.

But make sure you're box is beefed up in the right places.

12-01-2006, 08:27 PM
But! you'll chew through chains, sprockets and rear tyres like you wouldn't believe.

ozkat
12-01-2006, 08:35 PM
its been about 15/16 years since ive had a GSX . i cant belive how much ive forgotten. i was thinkin 1275, decent cams and headjob. maybe a set of smoothbores or flatties.

12-01-2006, 08:43 PM
A well done 1170cc job produces a blindingly quick motor, with greater durability, rideability, reliability, and less costs, building and maintaining.

Also the 1135cc standard cams were the stage1 cams for the 1074cc series, even when punched out to 1170cc

Zed14
12-01-2006, 09:11 PM
nothing you can do to that will make it go any better. you should have just bought a kwaka shayneooooooooooooooooo. then you will have a bike you could keep instead of upgrading every week.:D

12-01-2006, 09:14 PM
There's an idea!!!!?

Why not put in a ZZR11 lump? :) Instant upgrade

ozkat
12-01-2006, 09:15 PM
its all paid for rexie. has james rung you?

Zed14
12-01-2006, 09:16 PM
not yet but he will.

ozkat
12-01-2006, 09:39 PM
ill give serco a call and see what they say. ive go a couple of thou put away for the engine so ill see what happens

12-01-2006, 09:49 PM
money in a jar under the THRONE...hidden from she who rules the finances.buy a Suzuki Across engine for it and bolt on the turbo.Sure to be faster than a Guitarna engine.:D

stevo
12-01-2006, 10:13 PM
ya could always go out to 1370 a new barrell and use a '02 gixxer fuel injection and engine management system with a powercommander 3r and maybe some busa throttle bodies to get the top end.....



that's what we're doin with Clives '90 GSXR motor anyway ...... :D



(don't quote me on the cc's..not sure on the GSX stuff... I've been playin with busa stuff lately and I've got too many numbers in my head..... CLive will probably chime in anyway)

03gixxerpilot
13-01-2006, 04:45 AM
'90 gixxer going out to 1371 (very close stevo) according to the kit manufacturers the rest is correct, i will change the gixxer throttle bodies for a set of busa throttles. Stevo will be doing the work on it and port the head as soon as he gets his flow bench going. we still got to decide on what cams we going to use yet but we hoping to get 200HP at the rear wheel.

Deano
13-01-2006, 12:08 PM
quote:Originally posted by stevo

ya could always go out to 1370 a new barrell and use a '02 gixxer fuel injection and engine management system with a powercommander 3r and maybe some busa throttle bodies to get the top end.....



that's what we're doin with Clives '90 GSXR motor anyway ...... :D

I am very keen to know more about putting injection on a GSXR1100 motor. i have a 1100w that i was thinking of converting if it can be done.

(don't quote me on the cc's..not sure on the GSX stuff... I've been playin with busa stuff lately and I've got too many numbers in my head..... CLive will probably chime in anyway)

stevo
13-01-2006, 12:23 PM
stay tuned ... I'll be doin it to CLives motor later in the year....

and I'll make up the pieces as a kit if people are interested..

Deano
13-01-2006, 02:22 PM
quote:Originally posted by stevo

stay tuned ... I'll be doin it to CLives motor later in the year....

and I'll make up the pieces as a kit if people are interested..


definatly keen - i have been watching a few 04-05 throttle bodies on US ebay, they seem to go pretty cheap.

03gixxerpilot
13-01-2006, 02:25 PM
Deano, are you looking at doing the 1371 kit.

Deano
13-01-2006, 03:22 PM
unfortunatly there isn't the amount of good gear available for the water cooled models - probably just standard bore

Tony Nitrous
14-01-2006, 07:32 AM
1074 1983 SD Kat,
1170 kit,
Manual (Nut and bolt) camchain tensioner,
GSX750 oil pump gears,
36mm EF / EFE carbs,
Harris 4-1 pipe.

Pulled Hard at all rev's,
Stayed in one piece,
(except for the clutch that was rebuilt with a billet
back-plate to the basket and Heavy duty springs and plates,
O-yeah.... and a replaced 2nd gear, but that seems standard
if you ride them hard ?)

03gixxerpilot
14-01-2006, 09:39 PM
ok deano we'll keep all posted on the progress as we go along but wont be untill aroud may befor we start on that motor as i have my road bike and stunt bike to get back toghther first.

Deano
16-01-2006, 11:17 AM
sounds good mate

03gixxerpilot
16-01-2006, 11:51 AM
Deano i might as well start a new thread with the progress report of the gixxer 11 motor.
go here for the details. http://streetfighters.com.au/forum/topic.asp?TOPIC_ID=903