Spacer needed behind crankshaft nut?

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bendik
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Spacer needed behind crankshaft nut?

Postby bendik » Sun Aug 17, 2025 7:09 pm

This is a race/parade bike. I am now installing a new crankshaft and the former owner used a cut down rotor as a spacer behind the gear on the crankshaft, Is this really needed? Is the step in the cranksahft to small to support the sprocket?
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LaceyDucati
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Re: Spacer needed behind crankshaft nut?

Postby LaceyDucati » Mon Aug 18, 2025 7:53 am

Bendik

I wouldn't use the rotor centre, but you will need a bobbin type spacer behind the gear. I'll email you a sketch.

Nigel
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bendik
Posts: 40
Joined: Sat Jun 22, 2024 10:08 pm

Re: Spacer needed behind crankshaft nut?

Postby bendik » Mon Aug 18, 2025 9:23 am

Thanks Nigel!
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