Two cylinder determined to be a one cylinder
Two cylinder determined to be a one cylinderI have a CL77 Scrambler that does not run on the left cylinder.
The timing is spot on The plug fires strongly when grounded to the head There's raw gas vapor being blown out the exhaust pipe when it's running on the right cylinder. I did the spray around the carb insulator to see if there's a vacuum leak; nada So what's left for me to check? Gotta be something> Thanks. Check valve clearance on that cyl., confirm compression.
Switch plugs between left/right, a weak plug can fire in ambient pressure but fail under compression. Clear the dead cyl of unburned fuel so that it doesn't immediately foul the clean plug. Remove air cleaner and ensure that choke is not dropping down/defective, etc., and that slide is moving up/down properly. If still no joy remove carb and check for water, float level, jet sizes, etc. Check timing at both sets of points, if using strobe, check on both high-tension leads. Etc. Do what you've always done and you'll get what you've always had.
One cylinder determined to be 2I dropped the main needle one notch. It's now in the last notch from the top.
It n0w runs some. It's not hitting every time, but enough to warm up the exhaust. What's that tell me?
Two cylinder determined to be a one cylinderThanks, Chase
Did that already. Float and setting appear to be fine. Next task is to pull main jet and see what size it is and maybe try a smaller one. Anyone know what the original size was/is? If the jetting turns out to be okay and the bike's been sitting a long time make sure the mufflers are clear. It's not unheard of for bugs/mice to build nests in mufflers and plug them up. Try running it without mufflers or air cleaners.
Plug caps? Do what you've always done and you'll get what you've always had.
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