1973 cb500. Runs and rides perfectly, just has a few little issues on the low end.
1. When warm, it has "2" idle speeds. If I rev it and let it drop, it idles at 1500. From there, if I blip the throttle- giving it the slightest rotation for a split second, the idle will then drop to 1300. Both idles speeds sound consistent. I am not sure why it does this. There is no binding in the cable and the carbs return to its bottomed out position every time.
2. When warm, I have to crack the throttle a bit for it to start. I can't just kick, I have to hold the throttle slightly open. Once it starts I can let go and it will idle fine. I've tried adjusting the idle screw in to the point where it would start warm with no throttle, but then it just idles too high. On a second note I have to slightly hold the throttle open on a cold start for the first 15 seconds. Reading the forums I see mixed opinions on whether or not this is ideal.
3000 miles tuneup has been done. Carbs synced. Advancer mechanism cleaned and lubed, with shortened springs. Carb boots and manifold O-rings have been replaced. Stock exhaust, carbs, air filter, etc.
