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Old 08-31-2009, 09:20 PM
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Sydneysider Sydneysider is offline
Motorized Bicycle Elite Member
Join Date: Mar 2009
Location: Sydney
Posts: 189
Default Re: Engine and Bike Suggestions

just wondering dont these motors have the same stroke regardless of capacity? I know the 50cc doesnt have enough power to maintain top speed like the 80cc if they both used the smaller sprocket but what Im saying is their speed and rpm would both be the same regardless of the same sprockets they use. Put it this way, 2 bikes along side each other, one had 50cc and the other 80 using the same 36T keeping to the same speed, wouldnt theyre revs be the same? Im not disagreeing with you that the 80cc would accelerate quicker and reach the higher end speed because of the torque and power.. my main point here is the highest rpm before the things go bang taking into consideration that all components are pretty much identical in these motors except the bore.
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