primary drive chain adjustment b50

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steve walsh
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primary drive chain adjustment b50

Post by steve walsh »

can any tell me if theres a spacer between the sprocket and the crank bearing ? in the drawings I cant see any and what size is it
thanks s walsh
midgie
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Re: primary drive chain adjustment b50

Post by midgie »

There is no spacer between the engine sprocket and bearing, there is shims to ensure correct primary chain alignment, normally about .060"
steve walsh
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Re: primary drive chain adjustment b50

Post by steve walsh »

Then i have a problem because I have 250 thou [1/4 inch ] when checking chain wheel adjustment ,bugger
midgie
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Re: primary drive chain adjustment b50

Post by midgie »

Sounds like you have the spacer missing on the outside of the drive side main bearing which is on the inside of the crankcases.
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Ian Hingley
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Re: primary drive chain adjustment b50

Post by Ian Hingley »

steve walsh wrote: Mon Oct 03, 2022 11:59 am Then i have a problem because I have 250 thou [1/4 inch ] when checking chain wheel adjustment ,bugger
Sounds like your clutch hub isn't fully on its taper...
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steve walsh
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Re: primary drive chain adjustment b50

Post by steve walsh »

DO YOU KNOW ,I CAN'T REMENBER IF THERE WAS A SPACER ON THE INSIDE THE CRANKCASES ,OH BUGGER BUGGER!!! LOOKS LIKE I'LL HAVE TO STRIP DOWN ,I KNOW THERE WAS A SHIM ,THANKS FOR THE TIP STEVE WALSH
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minetymenace
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Re: primary drive chain adjustment b50

Post by minetymenace »

<135 to the forum steve walsh, glad to see you posting, sorry about your woes....anyway, would you update your profile please and let everyone know roughly where in the world you are please? It really does help <135
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Mark Cook
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Re: primary drive chain adjustment b50

Post by Mark Cook »

If there wasn't a spacer between the bearing either inner or outer Steve, it does not change the position of the outer bearing.
Have you got the kickstart parts assembled on the mainshaft?
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twinshocker
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Re: primary drive chain adjustment b50

Post by twinshocker »

But when the inner spacer is missing and you tighten the crank nut the crank will not turn free.....

Don´t ask me where from i know that <218
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Re: primary drive chain adjustment b50

Post by Mark Cook »

You should only make the mistake once ;)

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