Exact speed





PaNDeM1C

Your Disease.....
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I am running a 43 rear sprocket with no speedohealer... and if I'm going 90mph indicated what would the actual speed probably be? Curious.

Thanks.
 

Aquaman

Banned Permanently By MC Mustang
yup,I found the indicated speed read approx 8-10 mph faster than i was actually going
 

Professor

Hayabusa Immortal
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7.5% difference in gearing..... ~5-7% speedo error. Figuring 5% speedo error 79mph Figuring 7% speedo error 77.5mph
 

Warputer

Father of 4=Madness
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Reminds me of my old Jeep . Between extreme tire size changes and gear swaps , I didn't have a clue as to what speed I was running .
 

marcorp

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I've made no modifications to my bike, but the speedo is off by a good margin. I determined this by using a GPS to get my actual speed. At 90 indicated, I'm running about 84. If you have someone who has a handheld GPS, you can check it that way.
 

Aquaman

Banned Permanently By MC Mustang
Pan,I just wanna know where you bought that 'Green Suit'.
That is you right?
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?
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delboy

God save the Queen.......
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I've made no modifications to my bike, but the speedo is off by a good margin. I determined this by using a GPS to get my actual speed. At 90 indicated, I'm running about 84. If you have someone who has a handheld GPS, you can check it that way.[/Quote]

If thats the case, the true speed with a 43 cog Pan would be:

(40/43) x 84 = 78mph OK me old mucker
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