grinding

Hi everyone! Im new here and new to motorized biking aswell. i recently completed my modern style board racer inspired project with a chinese engine Kit. I was riding and my engine(2stroke 67cc Slanthead) lost power and after 100-150feet it stopped running. It would still rev after i got it...

Hey Guys, Just installed a Grubee GT 5 motor on my bike. Getting some grinding/squealing sounds coming from near the motor sprocket, but only when the clutch is engaged. As soon as i open the clutch the niose goes away. The motor is still almost new (maybe has 3/4 a mile on it as the niose...