r/Fixxit • u/AverageFella2000 • 20m ago
Idle Issues 1980 CB650z SOHC
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Hello.
1980 CB650z. I got the bike in August after it had been sat and not running in 12 years. I got it running in a fashion and noticed a fair few oil leaks from the top end, I’ve done a top end rebuild all new gaskets and solved the leaks. I’ve fitted new coil packs, new spark plugs, oil, oil filter, new carb-engine rubber boots as had the carbs and jets out to clean them all, pilot jets were particularly blocked.
However I cannot seem to get the bike to have a steady idle or return to idle, I have set the air mixture screws at baseline 1.5 turns out from lightly seated and been backing them out 1/2 a turn since. Currently at 3.5 turns out and this is the best it’s been but I can’t get it any better? Does anyone have any advice?
I’ve read it can be the slides sticking or the timing unit springs but seeking some advice first.
Thanks.