Posted August 24, 200915 yr My 125 currently uses a 14T front and 48T rear sprocket, and id like to change them to gain some top speed. How do i calculate what tooth sprockets i can go for?
August 24, 200915 yr My 125 currently uses a 14T front and 48T rear sprocket, and id like to change them to gain some top speed. How do i calculate what tooth sprockets i can go for? i found this on wemoto helpful http://www.wemoto.com/info.dyn?title=Sprocket_Gear_Ratios
August 25, 200915 yr Not sure whether the 125 has cable speedo from front wheel or an electronic speedo, but if it's not driven from the front wheel then be careful of your speedo under-reading, 30 mph reading could well be 34 road speed (or whatever) depending how much you change things by . . . you don't want to get caught out by camera's. Also bear in mind that by upping the front or lowering the rear to get better top speed might actually make you go slower; although the gearing would theoretically give a higher top speed, if the 125 can't pull the revs in that gear you could well end up making it slower.
August 25, 200915 yr Author Thanks for the tip, luckily, my speedo uses an electronic sensor on the front wheel, so whatever the back wheel is pushing me along at, it will remain correct.
_33963e.png)
_83bc35.png)
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.