Re: Motobecane AV7/AV10 cylinder struggle

Fred Braue /
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pictures would help some. lets see the assembly without the head on. some quick odd thoughts. cylinder stud bent or crooked in the crankcase. something wrong with the stud centers in the crankcase, a bad cylinder, i would also want to know did you buy a stock cylinder or performance overbore/big bore type. when putting the head on use a little silly putty on the cylinder head to see if you are just ticking the head or the chamber is a bit out of round . doubt it is the crank but for stock crank designs on the AV7 the bearings are 6307 with an odd taper that goes towards the crank side only

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