What’s an air leak and why is it so bad?
:An air leak is any place that air can get into your motor besides the right way: through the air filter, through the carbs, through the reed cage, and into the cylinder. An air leak can develop between the air filter and airbox, between the airbox and airbox boot, between the airbox boot and the carbs, at the carb tops, between the carbs and the reed cage, on the reed cage boots where the balance tube sits, at the reed cage gaskets, at the cylinder base gaskets, and at the crank seals. Anywhere that air can get in will cause problems, if it gets in before the carb then there’s a potential for dirt to enter the motor, causing rapid ring wear and ultimately piston failure. Air getting in between the carb and cylinder or through a crank seal will cause a lean condition on that cylinder, which also will cause rapid damage due to overheating. Beware of any signs of being lean (see Q#8), especially if only on one cylinder, and immediately check for an air leak before it’s too late. To check
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