R
Rconce01
Guest
guys a couple months back i built my first mototrized bike it was an 80cc china motor kit i got on ebay with the 40 tooth rear sproket, i noticed the bike would max out at 28 mph. So given i have a bit of a mechanical background and extensive cad training. I designed a new gear for the back that was 34 teeth. I got to 38 mph top speed with that mod alone but the engine still feels like it has plenty of power to pull an even smaller gear. Yesterday i was given a bike another 80cc usa motor but it was ported and the head was shaved. This thing once i got it runnning has some crazy power but its got a huge gear in the back 50 tooth. The funny thing is that is runs more top spped than the stock one which i modified the gear on. I was going to design a new gear for this one and i needed some advice on more or less at what point the engine will not be able to pull the gear. I am in florida so its flat and i weigh about 140 lbs.
Also the first bike we built has now over 1000 miles and runs awesome do you guys recomend i change out anything or check on the crank or the bearings?
I really love these bikes and i would hate for any of them to get damaged due to lack of maintenace.
Best ,
Ralph
Also the first bike we built has now over 1000 miles and runs awesome do you guys recomend i change out anything or check on the crank or the bearings?
I really love these bikes and i would hate for any of them to get damaged due to lack of maintenace.
Best ,
Ralph