Join Date: Jul 2014
Location: San Antonio and Houston
Motorcycle: 1986 GSXR 815, 2002 Bandit 1200N
1100 carbs on a 750 (1st-gen)
recently picked up another '86 750, started going through the bike to find that there's '86 1100 carbs on there, unmolested and all factory settings. I ditched the airbox and went with K&N pods that I had laying around, figured it would run better with those (plus the airbox made it a royal PITA to remove the carbs, reinstallation would've been near impossible). the motor is bone stock with a full aftermarket exhaust. compression readings on all 4 cylinders are pretty close to each other, so a simple bench synchronization on the carbs was sufficient. all jets and orifaces are clean, all o-rings replaced, jet needles and emulsion tubes are in great shape, good floats and float valves, float levels at recommended service heights, etc. the carbs are in good shape. the bike ran but was very sluggish and hesitant to throttle response. I was able to rev it out all the way, but the revs climbed slowly. started on choke just fine but still sounded like it was loading up. I had to give it throttle off of choke to keep it running. no big clouds of black smoke, in fact there was no black smoke at all. the carbs were hooked up to an auxiliary fuel tank that was gravity-fed. something is telling me its not getting enough fuel.
I know others have ran these carbs on their 750's, what jetting are y'all using? mine is all standard, mixture screws 2 turns out so far