Curt_750F Posted September 9, 2009 Report Share Posted September 9, 2009 Ok this is going to be a long one...prepare yourselves. I have a 1980 CB750F. Before I left for a month of Army training I took her in to get a Dynojet stage 1 jet kit put in. Mind you I already had a Mac 4 to 1 exhaust system on, and was doing this jet kit to even it out. When I got back I rode for about 3 days and after those 3 days my bike began to run really bad. It would bog down around 5500 to 6000rpm. This got a bit worse over another day. New plugs...nothing same story. So I get a set of used coils and install them, nothing. Go back to the original coils and new plugs (because the others were really fouled). Ran great for 3 days and then did what I described eariler. So I upgrade my coils to 92 CBR F2 coils. Ran a bit better but still bogged down around 5K rpm. I'm going to clean and regap my plugs tomorrow to see what that does but other than that I'm at a loss. The big thing is I can't tell if it's electrical or carbs. I'm leaning more towards the electrical side. My plugs were very fuel fouled (dry black soot on them). I'm just at a loss. Any help would be greatly apperciated.Thanks,Curt Quote Link to comment Share on other sites More sharing options...
v65rider Posted September 9, 2009 Report Share Posted September 9, 2009 You opened the exhaust and added more fuel with the jet kit. Did you open the air as well? Quote Link to comment Share on other sites More sharing options...
Curt_750F Posted September 10, 2009 Author Report Share Posted September 10, 2009 You opened the exhaust and added more fuel with the jet kit. Did you open the air as well?I put a K&N filter in but that didn't seem to do much. Quote Link to comment Share on other sites More sharing options...
QuikAccord Posted September 10, 2009 Report Share Posted September 10, 2009 sounds like you're burning way too rich. Quote Link to comment Share on other sites More sharing options...
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