QuestionIm trying to get a honda gl1000 running again. I redid the carbs got the motor going but it runs too rich turning the exhaust pipes cherry red. Im told that it nees to be rejeted but this doesn't seem right to me as im not even comming off idle and the pipes are still red. Could this be a timming problem instead? Thanks Ray...
AnswerRay, you may get more detailed info on your problem from:
http://www.classicwingclub.org/homepage.htm
You are right, however, that the pipes shouldn't be turning red at idle... although I have found that when bikes sit for a long time and you fire them back up again, a lot of old rust, fuel, oil deposits, etc. will burn off in the first half hour of running. That may be some of what you are experiencing.
Carb jetting for that bike should be: #35 idle jets, 62 primary main and 120 secondary main jets, at least for the 1976-77 model. The 1975 version had 65/125 mains, while the 1978 had a 60/120 combo. Ignition advance curves are different, as well.
Ignition timing, with the original points and condenser system, is pretty critical to correct engine operation. I would pull the point plate, check the condition of the mechanical spark advancer, then clean the points set them to the .012-.014" gap, then adjust the point plate bases, until you get the timing set correct at the F (Firing marks). Best to do it with an automotive timing light, but you will need the little special timing hole plug to keep the oil from coming out, when it is running. Static ignition timing can be done successfully, if done accurately. Running checks are the best, to ensure good running of the bike.
Once the timing is set, then you can concentrate on the carbs. On SOME Honda carbs with pri/sec main jets, you can accidently reverse them, giving a very rich mix at part throttle.
I would check over the timing belt condition, valve adjustments and do a compression check before you start trying to fix the rest. Low compression issues cannot be compensated for by carb/ignition adjustments.
Bill Silver
