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Motorized Bicycle Trouble Shooting Use this area to post problems that may arise, if you could use some help in figuring out what is wrong with your engine and what needs to be done to achieve top performance.


Air leak?

Use this area to post problems that may arise, if you could use some help in figuring out what is wrong with your engine and what needs to be done to achieve top performance.


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  #11  
Old 04-12-2013, 06:05 PM
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maniac57 maniac57 is offline
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Default Re: Air leak?

Yes, it sounds like an air leak somewhere. I'd check the crankcase seals if you find nothing elsewhere.
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Old 04-12-2013, 08:42 PM
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Default Re: Air leak?

Quote:
Originally Posted by maniac57 View Post
Yes, it sounds like an air leak somewhere. I'd check the crankcase seals if you find nothing elsewhere.
I agree. The seal behind the magneto rotor (magnet) is highly suspect. If the factory doesn't drive the seal in corrrectly the rotor will rub it destroying it. I've seen a couple of those but members here have also found the right side seal behind the primary gear defective too.
If you're confident that you've sealed the intake and carburetor and you still have the symptoms you're describing then take a look at your crankshaft seals.

Tom
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