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Old 12-09-2008, 09:46 PM
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Dave31 Dave31 is offline
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Join Date: Mar 2008
Location: Old Pueblo,Arizona
Posts: 11,119
Default Re: my first build is broke down

Well I could not find any pics.....

Your mag rotor has a keyway and a woodruf key that keep it in the right position on the shaft so you have the correct timing. If the woodruf key was sheered off the rotor would spin a little and there for cause the timing to be off and could be the cause of your back fire.

With the starting problems you been having it's possible that your timing was a little off which could be the answer why you had so much trouble. But now the rotor has spun enough to where the timing is too far off and now it wont run and it back fires.

How about it guy's? Am I on the right track?

The way to find out for sure is to remove your rotor and see if the woodrufkey is doing its job.
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