Its been a long road of trying to get this bike to run right. It was always lean at cruise speed. I did everything. Valve adjustment and such. Every jetting and needle combination, upping the pilot jet. Nothing seem to be right. One day I noticed it run a lot worse when it was windy. This is a 94 F2 that never had any plastic. I converted it to a street fighter when I first purchased it.

Long story short, air was rushing up into the air box pressurizing it since there was no plastic on it. It was cause it to go lean at 45+ MPH cruise speeds. I cut out some cardboard and slapped it in there to block the wind and the bike runs like a rape ape! Funny how the small things can make you pull out your hair.

 

You don't have the little piece of rubber that covers the air box intakes from the the engine?

 

I did at one time but pulled it out for cosmedic reasons. Even with it in I needs more air blockage as it makes it way through the frame.

 

That is kind of odd. I used to ride street fighter style for a month or so while I was painting parts of my bike and never noticed a problem.

I do know for a fact that the rubber piece is crucial. It keeps heat from the engine out of the air box, which will cause big problems. Either way, glad to hear you got it running well.

 

It really wasn't a big deal until I got rid of all the front stay. After the speedo and the whole assembly were taken off it really let the air rush in.