help please. i have a 92 f2 cleaned carbs and got bike to running but it still stumbles on full throttle. the bike set up for over 1 year do i need to just run a few tanks of gas and see if it clears up or is there something anyone can recommend.

 

Who cleaned the carbs and how? Do you know for a fact it ran right prior to sitting? Does it have stock exhaust? It sounds like maybe on of the jets is clogged a bit. From the transition from intermediate jet to main jet. Does it ever clear up or just stumble endlessly? Let us know this and maybe we can be of more help.

 

The biggest problem with carbed bikes isn't that the carbs are cleaned, but synchronized. See if that was done at the time of cleaning.

 

it does clear up and run fine at certain rpms but i have no idea what rpm that is due to not having tac at this time. carbs were cleaned only not syncronized exhaust is aftermarket vance and hinse and someone has gutted the muffler. any more thoughts are appreciated

 

My 900RR had a full V&H exhaust on it and ran great with a jet kit and K&N filter. However, my brothers 1000F HATED the full system he had on his. Also V&H. It was near impossible to get it right, and infact we never did. Ended up putting the stock exhaust back on and it ran like a million bucks. It is very possible it simply is jetted soooo far off that it's not running good. His would stumble badly and eventually clear itself out around 7k. It was all in the jetting and we tried like hell with a ton of different jets and kits and it was never right. Check into that perhaps. Check your plugs after ( immediately after) a full throttle pull and see what they look like. Dont idle it around or you will get a wrong reading of the plugs.

 

I bought a set of carbs on ebay for my 1000F. They were supposed to be "cleaned". When I opened the float chambers to check the jets they were spotless. But when I lifted up the piston/jet needles, three of them stayed in the up position even with the spring pushing down. The third one came down slowly. I could tell by looking at the screws holding down the vacuum chamber covers that they had never been unscrewed. If the carb's piston/needles and piston-walls aren't squeeky clean, the engine will never run right. Clean carbs means different things to different people.