520 Conversion and Speedo healers

Just to add, changing sprockets doesn't affect speedos of all bikes.
Some bikes (like mine) has the speedo sensor installed on the front wheel, so I can mess all I want with the gearing and sprockets, it won't change my speedo reading.

Other factors that can affect your speedo reading no matter which wheel you do it to:
- Tire size much different than the stock size.
- Bigger or smaller rim than OEM.
 
If you go to a 520 you will need a speedohealer or speedodrd. and when doing the calculation do so at a high rate of speed to have accuracy where it counts. Just my $.02
 
C-Note said:
If you go to a 520 you will need a speedohealer or speedodrd. and when doing the calculation do so at a high rate of speed to have accuracy where it counts. Just my $.02
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wrong chain size has nothing to do with your speedo reading, its only when you change the amount of teeth on either the front or rear sprockets

If he is only changing the chain size, but not the actual gearing, then his speedo will not be affected enough to need a speedo re calibrator ...
 
JohnnyP636 said:
wrong chain size has nothing to do with your speedo reading, its only when you change the amount of teeth on either the front or rear sprockets

If he is only changing the chain size, but not the actual gearing, then his speedo will not be affected at all.
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Fixed
 
caboose483 said:
Fixed
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I think the different chain pitch would affect it ever so slightly, but Im not sure if actually would at all, and if it did would it even be measurable. I have seen some gearing change calculators online that ask for chain pitch as well as tire size changes

Even a stock bike has a certain amount of inaccuracy, I can even be different % from bike to bike of the same model and year. Just like HP output can vary due to manufacturing tolerance range ..

Point is you can get it close, but you will never get it exact because as your tire wears it changes....So youve got to accept the fact there will always be a certain amount of inaccuracy
 
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JohnnyP636 said:
I think the different chain pitch would affect it ever so slightly, but Im not sure if actually would at all, and if it did would it even be measurable. I have seen some gearing change calculators online that ask for chain pitch as well as tire size changes

Even a stock bike has a certain amount of inaccuracy, I can even be different % from bike to bike of the same model and year. Just like HP output can vary due to manufacturing tolerance range ..

Point is you can get it close, but you will never get it exact because as your tire wears it changes....So youve got to accept the fact there will always be a certain amount of inaccuracy
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Pitch is accounted for in the creation of the sprockets. The only thing that matters is the final drive ratio. A 15/45 sprocket combination has a final drive ratio of exactly 1:3. A 520 kit with 15/45 or a 525 kit with 15/45 still ends up with a final drive ratio of exactly 1:3. Yes there are other inaccuracies, even tire wear will throw it off a small amount, but going 525>520 while maintaining the same final drive ratio will not introduce any additional error.
 
Sorry. I made the assumption that the sprockets WERE being changed... My bad
 
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