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Oct 11

Posts: 21

zosokam says:

Speedometer faster than should be on Bandit

Hi there, would anyone happen know why my 08 Bandit 650's speedometer is showing more MPH than the bike is actually doing? At 70mph it is showing about 75mph on the gauge, not sure what it is at other speeds. Is this something that can be checked at home or in a garage and fixed? Many thanks for your help. Kam

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  • Posted 3 years ago (07 May 2012 21:25)

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Jan 11

Posts: 204

frazmataz says:


arn't police cars callibrated? Not sure, mabey google that one.

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Feb 10

Posts: 1953

SlowLearner says:

"measured mile"

The only way to correctly gauge your speed is to time it over an exactly known distance.  There are "measured mile" markers on the road here and there, you need to time it, work out your average speed over that mile, then compare it to what you recall the speedo reading during that time.

Measuring it against anything else depends on that instrument's calibration being accurate - which it usually isn't.  Manufacturers tend to err on the side of an overestimate, arguably to reduce the chances of their customers getting done for speeding due to a speedo being a bit out.  Somewhat akin to the "baker's dozen" (look up that phrase's origin if you don't know it).

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Aug 02

Posts: 3273

eatcs01 says:


They are designed to be up to 10% out. Then when your front tyre wears down, the speedo isn't UNDER reading.

Rev counters can over-read too.

Just don't worry about it. It's normal.

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Jul 11

Posts: 244

MakemRider says:

Speedo always overread

By law they must not read less than true speed. For that reason manufactures build in an error factor to allow to ensure they don't otherwise it's them who could he liable.

They can read 10% + 6mph high. Your mates car will overread, they ALL do.

Best 'guide' (and again it's only a guide) it those speed readers that show you your speed. They are closer to true speed than most speedos but still no 100%

And no, you can't calibrate a speedo yourself, there's no way to adjust them.

Riade past several of the 'speed readers' to get an idea but when you pass a speed trap, USE YOU SPEEDO to be safe.

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Oct 11

Posts: 21

zosokam says:


Thanks for your help and clearing this up. K

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