I've been running a -1/+5 sprocket setup is there anyone that can tell me how far off is the mph on the speedo campared to the stock setup.Thanks in advance.

 

It wouldn't be that difficult to calculate with some of the spreadsheets that are out there. But that would be just a calculation. My suggestion is try to get your hands on a portable GPS. You can then see exactly how fast you're going in any particular gear. Motorcycle speedometers are inherently inaccurate.

 

I wasn't going for exact I was looking for some close.What spreadsheets are you referring to.

 

Check this sitefor a download.Your shop manual has the values you need to fill in for the F3 as far as gear ratios.

 

I've got a spreadsheet if you need one. It's modified to show the differences in mph after changing sprockets.

 

Yeah I would like to check it out Kwong.Thanks

 

im currently running -2, +5 and heres my speedo readingcompared to actual (This was clocked using another vehicle).....
Indicated 35mph on Speedo.....Actual--25mph
Indicated 45mph.....Actual--35mph
Indicated 70mph.....Actual--55 mph
Indicated 90mph.....Actual--70mph

this gives u a rough idea how far its off on my bike......the faster u go (or higher rpms)....the farther off the Speedo is....as u can tell ^^

 

I'm kinda confused...Isn't the speedo running off the front tire? If I'm correct, then it wouldn't matter what sprocket combo you have, only the engine RPM's tell a different story against mph...ie, 7000rpms at 60mph vs 5000rpms at 60mph stock. In either case, the front tire will still be rotating at 60 mph...
Am I smoking some good stuff here or ?
RB

 

No the F3 are an electonic speedo the F2 ran off the front wheel.
Must be some good s**t though.HAHA

 

damn i only did -1front and +2 back and that **** runs high rpms and maxs out i think way to fast in 6th how does it feel having 5+ teeth i really didnt know that could make such a hugh change?