Hi can anyone tell me, were you get the smaller rear sprockets from caurrently running 42 but do 50 miles aday on the motorway so need to change the gearing slightly.

Thanks

Lynda

It makes sense to go from 42 to 40 teeth, or even 38. Aaron who used to ride a CB1 had 37 teeth on the rear sprocket. You can buy them from Wemoto, they have special CB1 / 400 section
http://shop.wemoto.com/index.dyn?oid=25311

yeap thats what i did,only lost 500rpm top end,but quicker accelation which i think is better but that me.