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It’s partially firing on the left side at a lower RPM now. There was a timing issue, which was fixed, as well as loosening the idle air screw out 4 turns. However it’s still not perfect. The timing was way too advanced, it was an half an inch behind the L on the LF mark.

I might not even need to get a larger bike, there is an XS400 on Kijiji that looked pretty nice.

I think we might have one, I know we have a timing light since my dad had a timing or carburetor issue with his vmax before he sold it. Also I’m probably gonna start a notebook of all the specs that I’ve found for the xs so far. Just to check while I’m doing any maintenance on it before I...

we have fuel coming in since the cylinder gets wet and the valves work, it fires at a higher RPM and suspect that it’s an ignition timing problem

I hadn’t checked my emails since I posted this thread, so I didn’t get a chance to test it manually. However I got it running, even though for only 30 seconds since my dad, who has been helping me thus far, said that it was only firing on one cylinder and turned it off. The contacts were still...

Hey guys, I’ve been doing some troubleshooting on a 1979 XS 400F. I’ve tried the following: New spark plugs, swapped coils left for right, checked for continuity, new battery, tried adjusting points, right side works fine but left side no spark. Looking for advice, thanks in advance!