I took my 78 for its first voyage down the street and back. The idle RPM was around 1.5k, and I haven't yet adjusted with the vacuum gauge but it just arrived so I may do that today. I've also just rebuilt them with new seals and jets, and bench adjusted using two identical small screwdrivers to fit the throttle valves. It slipped into first gear well, but the revs seem twitchy.
The issue is when I took it out of first and held in the clutch, the RPMs went crazy to 4k and wouldn't go down until I started rolling it back into first. Could it be an air leak? How would I test for that? The choke slides are good and the choke was off. Could it be a stuck throttle cable? Not sure if that was it either.
The second issue is the right cylinder runs much colder than the left. The left side has exhaust I can see, whereas the right cylinder is compressing and pumping out exhaust but at a much lower temperature. The right sparkplug looks wet, whereas the left is dry and less dark. What should I check for? Could this be a carb sync issue, where the right side isn't getting enough air flow?
Out of these, which will help the most?
- Cam chain adjustment
- Valve adjustment
- Timing check/adjustment
I'll post a video in a bit.
The issue is when I took it out of first and held in the clutch, the RPMs went crazy to 4k and wouldn't go down until I started rolling it back into first. Could it be an air leak? How would I test for that? The choke slides are good and the choke was off. Could it be a stuck throttle cable? Not sure if that was it either.
The second issue is the right cylinder runs much colder than the left. The left side has exhaust I can see, whereas the right cylinder is compressing and pumping out exhaust but at a much lower temperature. The right sparkplug looks wet, whereas the left is dry and less dark. What should I check for? Could this be a carb sync issue, where the right side isn't getting enough air flow?
Out of these, which will help the most?
- Cam chain adjustment
- Valve adjustment
- Timing check/adjustment
I'll post a video in a bit.
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