View Full Version : speedo is off

08-31-2010, 03:54 PM
I noticed that me speedometer reads about 8mph too fast. Wondering if that is common for pre kats. Anything I can do to make it accurate??

1990gsx 600
08-31-2010, 04:13 PM
are you running stock gearing(sprockets) and are the tires stock size both of those are culprits...... mines off due to sprocket size so..... i would check that

08-31-2010, 04:31 PM
the pre-kat spedometer has no relation to the sprocket set, since the spedometer is driven by a mechanical gear at the front wheel.
a larger size front tire will make a difference (i.e. the common 120/70 instead of the stock 110/70)

It is typical for these speedos to be.... optimistic at the best of times.
Running that slightly larger front tire, mine's easily off 10%

not much you can do about it without a helluva lot of effort

1990gsx 600
08-31-2010, 04:32 PM
ohh duh nvm i had a tard moment