Speedometer reading too high??

[05gsx600f]

So I just discovered that my speedometer reads about 15mph too high. It's says I'm doing 80 but I'm really only doing 65. Has anyone else ran into this problem. I have a 05 katana 600.

[TRPUT]

Most likely reason is you're not running standard sprockets.

[05gsx600f]

That's kinda what I was thinking. I haven't checked the sprockets yet. Do you know how many teeth the stock sprockets have?

[maniac1886]

14 in front 47 in back I believe

[shpielers]

In my experience most bikes are off to begin with, Kats seem to be off by ~10%. So sounds like you might be a little high.

I thought the front sprocket is 15t? Rear is def 47 though.

Edit: front is definitely 15t according to gearingcommander.com

[maniac1886]

oops sorry. Thanks for the correction. I was pulling that from my beer infused memory at the time. lol