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Sierra 3.14 diff (or CWP)


Shortshift

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  • Area Representative

Wouldn't a BEC need a fd ratio from the other end of the spectrum??

 No. Most bike engine/'box assemblies have a primary reduction.

'Busa has a 1.596:1 primary reduction, so, even with a 3.14:1 diff, top speed is still limited...

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  • Leadership Team

Yes, that's the plan.  Replace the 3.38(?) unit that's in the car at the moment with the longer 3.14 ratio to give more relaxed cruise performance with the 6-speed gearbox. 

Phil and Ollie at Road and Race can't help at present, hence my posts to see if there are any 3.14's available on the market.

James

 

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  • 3 weeks later...
  • Area Representative
  • Leadership Team

Thanks chaps - saw both of these on ebay and actually followed up on one, but the lack of provenance is preventing me from going ahead.  If I could find one from a Club member I'd be able to buy with some confidence, but £1000 plus is too much to risk on a punt.

Thanks for pointing them out, though.

James

 

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