My dad has a 93 CBR1000f. His speedo seems to be off quite a bit. I paced him on my stock F4i at about 70 mph and his speedo said about 82 mph.

Any ideas how to fix this? Maybe it has lower gearing? What should the stock sprocket sizes be? Thanks.
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GRANNY PLUM

 

Maybe the CBR is reading high and the F4 low

 

i've checked mine on one of those radars they put in school zones. It's pretty accurate.
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Chevrolet

 

My speedo reads high too, but the guy I bought it from lowered the gearing and I've always assumed this was the reason. Does your dad's bike have the stock sprockets? If he bought it used then there is a decent chance that one or both stock sprockets have been changed.

 

Yeah, it's a used bike he just got about a month ago. Does anyone know what the stock sprocket sizesare for a 1993?
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Amateur Cams

 

Do a search under "sprocket", you'll find an answer.

 

Mine reads about 10% too high (standard sprokets), my 4x4 reads about 10% too low, My girlfriends car reads about right

 

oh well i guess it's common....i'll still check the sprockets though.
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Vaporizer Reviews

 

I believe I read that the 89/90 sizes are different to the 91+

 

It's either 17/42 or 17/43