So here's the follow-up, with some news...
Previous feedback - Rolf.Soler, thanks for the added input. Yes, I ordered a new condenser which is cheap, and confirm that I have installed a new spark plug before doing all the tuning stuff
.2 days ago
Fixed the gas tank tap (Frankfurter model) leak (at least this type of leak is a must-do
). A couple of more turns and now it is fine and aligned... Replaced one more gasket on the carburetor and very carefully re-tightened the rest (I know, I have to be VERY careful with these aluminums...). Looked into the generator area for a visual recon of the condenser. Ordered the condenser and some new bits for the carb, just in case...Yesterday
Time for a small test drive and re-tuning... So it started on the first kick
1. Throttle response with initial dip in power but would pick up very soon after, and ran OK, although with more "bass"
2. When stopped, it would accelerate by itself again, 1400-1800rpm.
3. Mixture screw with gasoline come out from here - is this even possible?...
4. And finally...
observed that the spark plug and cap was vibrating more than the head
Stopped the engine and confirmed that the spark plug thread insert was loose on the head, although it could keep the spark plug torqued, and even sometimes did not feel loose at all
Well, that may now explain the rpms going high (air leak)
Check the photo, were you can see light damage from the vibrating spark plug.
So, now, need to either re-weld the head and drill and tap a new thread, or get a larger insert fitted... I could not find a good thread on this matter, can you guys advise me which is the best, longer lasting option?
Also, it would be my first time removing this head, I already removed the exhaust nut carefully (it was not properly tightened...), if you guys have some tricks or special advice (besides the manual, which I have of course
) it would be highly appreciated!
Wish me luck, hope all else is OK