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Honda CR125M gear set up

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Ruairi

Post subject: Honda CR125M gear set up

Posted: Sat Jul 08, 2006 10:53 am

Joined: Fri Jul 29, 2005 2:21 pm
Posts: 123
Location: Gloucester, England

Can anyone answer the following please?

I am rebuilding a 1976 CR125M which has a new 14 tooth chain sprocket on the engine.

My query is what size rear sprocket to buy?
What are the differences to performance if I was to buy either say a 51 tooth or a 55 tooth sprocket?

Any help gratefully received.

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Nathan

Post subject:

Posted: Mon Jul 10, 2006 10:53 am

Site Admin

Joined: Tue Mar 04, 2003 8:46 am
Posts: 215
Location: Alpine, UT

Try plugging in your specific values in this calculator and see what you get. It looks like its used mostly for road bikes, but the princples are the same. Gear ratios are gear ratios. Your bike probably isn't in the presets so you'll have to manually enter your data.

http://www.xs4all.nl/~ator0437/gc/

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Ruairi

Post subject:

Posted: Tue Jul 25, 2006 1:30 am

Joined: Fri Jul 29, 2005 2:21 pm
Posts: 123
Location: Gloucester, England

Thank you Nathan. Problem solved I think.

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