maxc

I synced them with the throttle wired open so that I could see the white dots through the glass piece.

They've already been synced.

I put brand new pilot and main jets in and they're super clean, no blockage. The spar plugs are getting pretty fouled (too rich) but when I put the right plug on the left side, the left still does not fire. I've also switched the coils and it does not help. I have not compression tested it yet.

Hi, I've got an old banshee that we got for trade and it runs like garbage. It had a Wieseco top end rebuild stock bore. It starts up first kick and idles great. Under partial throttle the left cylinder completely goes cold and does not fire what so ever. When you give it full/a lot of throttle it fires very aggressively and the power comes on so hard it tries to rip you off the bike. I re-jetted it changed plugs along with some simple things but i can't seem to get it. Any help and insight would be awesome because i'm in Canada and it starting to get cold already...winter is coming.