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Was taking the very very torqued spark advancer out and while taking it out two tiny screws popped out from somewhere. I have been looking through diagrams and pictures but cannot find where they belong. I think they may be from the spark advancer or the edges of the starter clutch where the...

It is a 50k engine. Yea I know you probably saw that one coming right haha. So I am thinking rebuild or new engine. A few people are selling salvage 750 dohc engines near me but If I decide to go rebuild do you think I am looking at extensive work, time and money? Tough question without seeing...

Also did it with choke open and closed for each test. Not much or any difference. But now I know for next time.

That is a thread in on the spark side not the guage. The guage side is a push and lock type thing.

Thread in good and tight. Max of 90 was reached on third revolution. It's a Pittsburgh auto from harbor.

New Compression test: 90-95psi on all 4. Think the reader is slightly under as well because first test showed 70psi and after adjusting it went up to 90. Carbs in, choke closed, full throttle and all plugs out. I can confirm that at least 2 cylinders are running as well which isn't saying much.

Don't know how close to 160-170psi should it be at that point of 60 seconds off/on run time but it looks like it is definitely missing the mark somewhere.

PO was my friends dad trustworthy source but you never know like.you said how he maintained it. It wouldn't even start before carbs so that's why I worked on it to get it far enough to do things like a compression. Could only.get the bike to start three times(20 seconds) before battery died...

PO only had leaking carb issues as well but never had engine trouble. I've only put the carbs back to working condition so if the engine is toast it's a huge surprise how that could of happened.

Also 4 got warm today after being ice cold yesterday don't really understand that.

Damn. I shouldn't even waste my time checking anything else and just compression to confirm it's dead once the battery is charged again. You've probably seen this before so am I likely dead in the water or is there a chance anything else is holding it back?

Cylinder 2 and 3 are the warm and hot. 1 and 4 are the cold. Checked the spark again and I have a definite weak spark on 1 and 4 and strong spark on 2,3. Pull/replace the plugs or check the ignition/coils is what I am reading mostly. But could this still be a fuel issue? The bike is now...

Had a few broken pilot screws so pulled the tips and replaced those. Same issue. I checked the plugs and they seem fine. 2 times now the bike has gone full throttle and worked at 5000-7000 rpm before dying! Also the exhaust afterwards was interesting. 2 are cold, one is warm and the other is...

Hey everyone I am having trouble getting this bike to the finish line and after researching the manual and other posts on the internet I can't seem to find what's my exact issue. There is a potential list but if anyone understands the issue or has had it before then it would be much appreciated...