I have a Piaggio NRG extreme, not new and more of a tinkering project, how-ever, although it starts fine, the rear wheel turns very very slowly, even when the revs are increased,certainly not enough momentum/power to get moving..Any pointers as to the problem would be appreciated. I have checked the clutch/variator/drive belt and all look visually fine...

Thanks

Simon, February 2010

no spark this bike has not bean used turns over with the battery ive taken the plug off put it next to steel and nothing

derek, February 2010

Sorted...Did what you mentioned Adam and all was as it should be..did a bit more fault finding and eventually found it was a dodgey spark plug..The quality of the spark was very poor, changed it, bike ran alot smoother and revved 100% better....and solved the issue immediatley...Thanks for your response

Simon, February 2010

Thanks Adam, I'll do that and see what the results are..In the back of my mind I think the variator weights or clutch may be at fault..I'll get round to looking in the next few days and post results.

Simon, February 2010

well the revs or the rear wheel are in direct relation to the revs of the engine,so if the engine is revving ok like up to 6000rpm on a nrg then the rear wheel should spin pretty quick and if it doesnt then there is definately and problem with the drive.i would do as follows
undo the transmission cover and take the small starter bendix gear out temporarily,it needs a slight wiggle and will fall out put the case back on and put 2 bolts in the case one at either end,start the bike up and then take the case off while its running it will be ok as long as the bendix is out,be very careful not to get your fingers in the drive system when its off rev the bike and see what happens the crank will be whizzing around and the drive belt should be too at 6000 rpm the wehhl should be going fast too and if its not then you should be able to tell why not lookig at it like this.p.s leave the kickstart lever bolted to the shaft it doesnt need to be taken off to get the cover off.

adam bike doctor, February 2010