I have an 86 750 that I am building for 100% track service.

I have a set of carbs from an 87(34mm) but I was thinking that I wanted something bigger/better.

I have been pointed towards 38mm carbs from a slingshot or 36mm carbs from 1100s or 1200 Bandits (97-00)...

What carbs are on what years and what would give me the best performance possibilities without going the flatside route.

I LOVE my 36mm B-12 carbs. I have a set of 40's, but will not put them on I like these so much...

Depends on what track you are riding 36's for a tight track 38s for open tracks. You can get more TQ with the 36's better drive off most corners.

I should have probably said that I am using 88 cams - Intake lobe height of 33.88 and exhaust lobe height of 33.50 and a fully ported 86/87 head with stock valves. I havent decided on a compression level yet, but its going to be at least a little higher than stock. Plus B12 exhaust.

I noticed that FactoryPro has a kit for 38mm Powerjet carbs for the 86/87s.

Would 38mms with the power jet work without an airbox?

Gotgixers
How do you have your 36's set up?your main jet and pilot size what jet kit ect...thanks

heck, i have no clue... I set these up 2 yrs ago when i finished the bike. I REALLY do not remember, and i cant find the original jet kit around anywhere either.... I know i fiddled with them for 3wks to get them to run better than any of the EFI bikes I have ridden. It will start and run all the way down to about 24 -26 deg, and runs good all summer long too.

Can the 38s be set up to run decently on my bike? The only carbs I have been able to find are 38s for $150 and 36s for $300. I would rather get the 38s and spend the time making them work.

Would 38mms with the power jet work without an airbox?

YES, you can use them without an airbox. The power jet wont do anything. They can be a PITA to tune, but it can work. That 91 GSXR, with the 165hp 1216, i sold had 38's on it with Pods. It ran great.