How far off would the speedo be?

I searched and couldn't find anything...

Thanks guys.

 

need more info. if you go with the same gearing as stock then your speedo would read the same as it does now. but change the gearing, who knows? what do you have now and what are you going to?

 

Yep, if you just do a 520 conversion and keep the same sized sprokets the speedo will read the same. If you get different sized sprokets (ie 15 teeth instead of 16) then the speedo will be out

 

I thought F3's had the speedo connected to the front wheel?

 

Nope its not that old. lol The 520 will not change your speedo. Anyways don't worry about your speedo being off if u change your gear ratio because they are not right to begin with. At least mine is like 10mph off at 70 with the stock gearing.