Hi,
94 FXSTC, crane cam, Cyclehshack M series pipes and Revera hi-flow AC..
Here is what I have: The rear cylinder runs rough, at idle it will fire, fire and then kind of pop or poof, you can feel it by holding your hand over the exhaust. It kind off breaks up or burbles at low speed constant throttle settings, neither decel or accel, just coasting. Other than that it runs like a raped ape, pulls strong through all ranges, idles ok-(other than the rear noise), 40mpg, good looking plugs and no smoke. Compression, leakdown, timing, voes, intake gaskets, exhaust, all ignition parts, either checked out OK or have been replaced.
Unless anyone has and ideas I'm down to either a carb issue or the cam that the PO installed is either too radical-(overlap) or off a tooth-??. The CV carb I'm dealing with has a dynojet kit and thunderjet, it's been really worked over and somehow it seems to perform well with 45/165 jets, needle clip two from the bottom. The lowspeed needle will not shut the motor off when closed but does kill it when turned three out and the idle speed screw is almost turned all the way in, both of these are incorrect.
Since this carb has a few extra holes drilled in iit and a ton of work done to it, I'm gonna start over. Question is, should I get another CV or go with a Mikuni 42 and why?
Thanks for listening
Doug
94 FXSTC, crane cam, Cyclehshack M series pipes and Revera hi-flow AC..
Here is what I have: The rear cylinder runs rough, at idle it will fire, fire and then kind of pop or poof, you can feel it by holding your hand over the exhaust. It kind off breaks up or burbles at low speed constant throttle settings, neither decel or accel, just coasting. Other than that it runs like a raped ape, pulls strong through all ranges, idles ok-(other than the rear noise), 40mpg, good looking plugs and no smoke. Compression, leakdown, timing, voes, intake gaskets, exhaust, all ignition parts, either checked out OK or have been replaced.
Unless anyone has and ideas I'm down to either a carb issue or the cam that the PO installed is either too radical-(overlap) or off a tooth-??. The CV carb I'm dealing with has a dynojet kit and thunderjet, it's been really worked over and somehow it seems to perform well with 45/165 jets, needle clip two from the bottom. The lowspeed needle will not shut the motor off when closed but does kill it when turned three out and the idle speed screw is almost turned all the way in, both of these are incorrect.
Since this carb has a few extra holes drilled in iit and a ton of work done to it, I'm gonna start over. Question is, should I get another CV or go with a Mikuni 42 and why?
Thanks for listening
Doug