Totally unique carb swap.....Can you help?????

[nastyjones]

I have purchased an 850 top end (head, cams, cylinders, pistons) & adapted it to fit on my 750 cylinders. I am told this was a fairly common swap years ago. I had to grind some meat off the cylinders where they slide into the crankcase but it wasn't difficult. I also did this so I could use the cv carbs & here in lies the question. I am looking for newer style carbs & have heard that some gsxr carbs from the mid 80's work. Or how about 600 or 1200 Bandit? Can anyone tell me what exactly I should be looking for?

I also need a source for the 850 intake rubbers as well.

There also seems to be only a few people who remember this swap, so if you're one of them & can give me advise, feel free to pm me.

Thanks, Paul

[nastyjones]

So, can you tell me; do I need 32,34,36's?

[shaftzuki]

The 850 up through the 1100 2 valve engines used 34's ... 8)

[nastyjones]

True, but isn't there an advantage to using newer carbs say 1200 Bandit?

[Dink]

Early GSXR flatslides is what you are after, 36mm as I recall
Dink

[Billy Ricks]

Look for what are commonly referred to as Slingshots.

[humhead]

850 form 1980 on have 32mm CV carbs. Carb choice depends on how you intend to use the bike. Over-carbing your engine will result in poor low to mid rpm power & lousy fuel mileage. Cam timing is another important factor.
Congratulations on getting everything together.

Terry

[nastyjones]

Well the motor will be mildly ported & will have a 4-1 as well as updated ignition so I thought 34's or 36's

[nastyjones]

Would modern Bandit carbs work? What size are they on the 600 or 1200 motors?

[jgordon]

So, can you tell me; do I need 32,34,36's?

I have several sets of GSXR 36's but I think it's too much for what you have......

[nastyjones]

I found out the 600 Bandit uses 32 mm. I think they're my best starting point. Anyone try them?

[sisu1970]

carbs

The 86-87 gsxr 1100 34mm carbs would work better than the bandit 32mm carbs. They are more responsive than stock carbs and work great with individual filters. I may have an extra set in the near future (87 gsxr 34mm).