main jet size

[jamj]

Hi there ive just put a gsxr 750 engine in my bandit 600 and kept the 600 carbs dose any1 know what size jet in need to change to as the help would be great

[temeluchus]

Bandit 600 carbs might be a touch small for a gsxr750 motor.

How does it run at the moment? What model year gsxr is the motor from?
____________________
Some shite cruiser. Now with guns and FREEDOM!

[jamj]

Its a 86 engine it not running that good at the moment
a mate of mine is doing for me he has upped the jets by 20 at the mo it run well at first but now when try to run it it starts but when you put it in gear and go to pull
off it dies on me

[jamj]

Its a 86 engine it not running that good at the moment
a mate of mine is doing for me he has upped the jets by 20 at the mo it run well at first but now when try to run it it starts but when you put it in gear and go to pull
off it dies on me

[bodger]

Sounds as though the main jets are way too small.As you are using bandit 600 carbs on a 750gixer the only way to get correct carburation is trial and error .

[jamj]

ok ta

[Casper]

I looked into this a few years back and was told to use the 750 carbs. My donor engine was going to be the 750 teapot, More or less the same engine. You should get a set of teapot carbs a lot cheaper that the gsxr if need be. If the bandit 600 carbs are the same bar the jets you would be better looking to download the 750 manual. Shame as i not long got rid of one that was going for free.

[Casper]

A quick google says the 89 gsxr has 36mm carbs and 115 main jets as standard. That is the same as my kwak 750 with standard airbox and filter.

[jamj]

iv put cone air filters on it as well but will try the 115 jets
cheers

[chillpill]

with cone filters you will need bigger jets , youll need to increase the sizes of the other jets too if you want it running perfectly , you should just get some 750 carbs it will be alot less hassle alot better for ypour engine and you will get a slight power increase

[jamj]

cheers for that ill tell my mate who is doing bike for me

[temeluchus]

The 1986 model ran 29mm flatslides. So the B6 carbs will run it fine once setup.

(the 1989 model runs TOTALLY different carburettors to the 85-88 models).

If you are running individual pod filters you will need MUCH bigger mainjets. I would guess going from the stock 110 or so to more like 130-140.

(I've owned a couple of GSXR1100s and a 7/11)
____________________
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[jamj]

thanks for that main jets on B6 1&3 are 100 and 2&4 98 or other way round so how would i sort that out or how much would i up them to?
as you said up them to 130-140 so should i up them 30 or 40 more and see what comes frm them?

[temeluchus]

I would start at 130.
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Some shite cruiser. Now with guns and FREEDOM!

[jamj]

is that for all jets?

[Casper]

As i said i have a different 750 bike but its mikuni 36mm carbs and when i got the bike it had cone filters and the jets were 155. I dont know how it ran as it was a non runner when i got it but as said, start around 140-145 to see how you go.

[jamj]

ok

[temeluchus]

Same jets in all 4 carbies.

It should start and idle ok, it may need the idle screw to be turned out a bit.
____________________
Some shite cruiser. Now with guns and FREEDOM!

[jamj]

cheers for that