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Spacer needed behind crankshaft nut?
Posted: Sun Aug 17, 2025 7:09 pm
by bendik
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?
Re: Spacer needed behind crankshaft nut?
Posted: Mon Aug 18, 2025 7:53 am
by LaceyDucati
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
Re: Spacer needed behind crankshaft nut?
Posted: Mon Aug 18, 2025 9:23 am
by bendik
Thanks Nigel!