Originally Posted by DRBS
ok so I have three of these motorized bikes 2 are 700c bikes and with the stock 44 tooth sprocket it goes 40 and it only has 10- miles on motor. my question if I change to a 32 tooth what could reasonably be my top speed???? also the fixie bikes that walmart sells work great if you take the fixed sprocket off and add two 1/3"
washers to the motor drive side and one to the pedal side it makes the chain farther away from the frame. I have a 49cc and two 80cc bikes and just wonder how long till the rings wear in???? the book says 200 miles but that must be a crazy number
I wouldn't go smaller than a 36T on the bike personall, especially if the ngine is basically just a stock set up, a 32T may b to small for you engine to pull and will really hurt the bikes ability to pull you up hills, on my bikes the 36T has always been a good size for good cruising speed at lower rpms than you have ith a 44T and still has enough grunt to pull me up the hills where I live.
200 miles for a good break in period may isn't a crazy # sometime some of these engines dont reach there best and smoothest running until twice that and others will be settled in nicely at 150-200 miles, just depends on how smooth and true everything in the engine is from the beginning really and also depends on how the engine is run, if someone just putts around and never really revs the ngine mch for long stretches it may take longer for it to settle in and vise versa.