maxc Posted August 31, 2019 Report Share Posted August 31, 2019 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. 1 Quote Link to comment Share on other sites More sharing options...
the boris Posted September 1, 2019 Report Share Posted September 1, 2019 Are you sure the left side works good at idle too? If not check the pilot jet for blockages. Are you getting enough of fuel in the mid range?Check the needle height.Might be fuel, or electrical, check the spark too. Sent from my ONEPLUS A3000 using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
the boris Posted September 1, 2019 Report Share Posted September 1, 2019 Check the compression too, just to know where you are at. Sent from my ONEPLUS A3000 using Tapatalk Quote Link to comment Share on other sites More sharing options...
maxc Posted September 1, 2019 Author Report Share Posted September 1, 2019 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. 1 Quote Link to comment Share on other sites More sharing options...
Keno Posted September 2, 2019 Report Share Posted September 2, 2019 Sounds like the carbs need synced using the adjusters on the caps. Quote Link to comment Share on other sites More sharing options...
maxc Posted September 2, 2019 Author Report Share Posted September 2, 2019 They've already been synced. Quote Link to comment Share on other sites More sharing options...
Keno Posted September 2, 2019 Report Share Posted September 2, 2019 You synced them at partial throttle? Or just at idle Quote Link to comment Share on other sites More sharing options...
maxc Posted September 2, 2019 Author Report Share Posted September 2, 2019 I synced them with the throttle wired open so that I could see the white dots through the glass piece. Quote Link to comment Share on other sites More sharing options...
Keno Posted September 2, 2019 Report Share Posted September 2, 2019 Ah, okay I've never messed with stock carbs. With pwks I use an air flow meter. Quote Link to comment Share on other sites More sharing options...
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