is there anyway to readjust the speedo for a sproket mod on the F4i? was thinking about dropping a tooth on the front for an upcoming trakday for better acceleration but would like to know my speed.

 

i have heard of a product called speedo healer... do a search and it may come up... sorry cant be more help...peace

just found the link..

http://www.speedohealer.com/eng/intro.htm

 

I actually did the exact same mod. 1 tooth down in the front and the speedometer showed about 10%-12% faster than I was actually going. Not an exact because Im comparing whats on my speedo to my friend riding next to me at 50mph. Side note, it does make a noticeable difference in acceleration.

 

You need a speedo healer to adjust it. Is worth doing though because in addition to giving you a dodgy speedo reading it also adds more miles to the clocks. They can be used to calibrate your speedo to better accuracy too as most stock speedos will read high by up to 10%.

It is quite expensive for what it is though.