I am still working on getting this H2B to run cleanly. Partly it's difficult for me because I have never ridden one before and don't know how it should run, how hard it should pull etc. It does pull hard at 5,000 and over, but under that it's a bit erratic. At low revs I think I feel a cylinder jumping in and out again, and the motor does seem a bit lame under 5,000, almost like it's only on two cylinders. Also confusing me is the fact that I have expansion chambers, and maybe these are hurting the bottom end, but my experience tells me they shouldn't hurt that much. SO, when I checked the ignition timing, the RH cylinder seemed to have a misfire, the strobe light would cut in and out. Also, because these are new pipes, the LH and center headers are going a light straw colour, but the RH one not so much. Also when I shut the motor off, I can notice the RH head is a little cooler than the LH one. So this question is, what ignition part would cause something like a misfire? Could the CDI do this or do they typically just quit? The coils and plug wires are original, as are the pickups and windings. The wire harness is also original, but seems to be in good condition, I cleaned and checked the connectors for tight connections etc. I don't see any cylinder base gasket leaks or head leaks, no oil present, all clean. The crank and bores and rings and pistons are all new, and it starts and idles great. So it seems like it's idling on 3 cylinders, but when I load it, it drops the RH one, which does point me to ignition.
_________________ 1974 Kawasaki H2B 750, 1981 Yamaha XV750 Cafe, 1986 Kawasaki KDX200, 2003 Honda XR100, 2004 SDG140. 2006 Ninja 500R Turbo intercooled fuel injected.
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