I own a 88 Honda CBR 600 F1 Hurricane. It has a Vance & Hines "Chrome" slip-on and a K&N filter, everything else is stock. I do not believe the prior owner had the bike rejetted for the slip and filter. When I purchased it one month ago it ran fairly well exept in mid-range 4-5k. The exhaust krackles in mid-range and during engine braking. Since then I cleaned the air filter and know have a new problem. After cleaning the filter, it realy bogged in mid-range. So I was driving on the freeway which is when the engine usually seems to want more fuel or less (wont run smoothly) and slowly moved the choke on when all of a sudden, the motor smoothed out
. If I keep the choke on while I ride it runs like a champ . However, when I come to a stop, it revs around 2-2500k which if very fast.
Knowing that when I ride with the choke positioned at the half-way point the motor runs exelent through all rpm's at all speeds (execpt the fast idle at stops), is making me believe that the Vance & Hines Chorme slip-on and K&N is effecting the fuel to air ratio. If I understand correctly, if the choke is on and it runs great, that means there is normally too much air and or not enough fuel. This would most likely tell me that the prior owner did not rejet.
Is there a simple way to fix this?
Is there a fuel to air mixture screw on the carbs?
Can I damage the engine by keeping the choke on
Thanks for your feed back....