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Originally Posted by miller
nope
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Oh yes it does.
Chains are not better than 99% efficient.
Belts can be 97-99% efficient, depending on if they're Vee, synchronous, or what have you.
CV joints lose a bit of power too. I think it's less than 1%, but it's still a loss, just like bearings are. Just like the mere fact that spinning a shaft takes power. If spinning a shaft DIDN'T take power, it would just sit there and spin with no power input right?
I don't think you are getting what I'm talking about. AS NOTED on a car the power goes from end of crankshaft to trans input shaft. On a bike it does not. It goes through a chain or belt first. STRIKE ONE! That's a 1% loss the car does NOT have. Same thing on the other end of the transmission- STRIKE TWO! So by the time the power gets to the output shaft on a bike, it will have lost 2-3% or maybe more vs if it had an automotive layout.