1st time user. Glad to see such a movement happening. I recently purchased a rear mounted friction drive engine. The engine has a centrifigal clutch which is supposed to spin fast enough to expand and grab the housing of the friction drive wheel. The engine powers on but no movement from the wheel. There is no special switch or cable to expand the clutch so I am assuming that I am doing something wrong. I switched out the kit for another one but the issue is the same. I have had it accelerated for high RPMS for about a minute but still nothing. Does anyone have any suggestions? Also I have 20 front mounted engines that came from China. No installation instructions. Any suggestions on that too. Thank you..