Hi, since getting my S/H Torq some of my retired friends have also bought (on ebay) a selection of electric bikes.My garage is becoming a regular repair shop!
A friend has a Thompson Euro Classic (single speed, rear hub motor). The wheel spins smoothly and noise free, but once switched on (no throttle used), when the wheel is turned by hand it knocks, 9 knocks per rev. When motored on the throttle it makes an audible knocking relative to speed. When ridden it still knocks but it is not quite as noticable? perhaps the load/effort absorbs the sound to some degree?
It sounds as if the rotor/stator are catching? My Torq makes a slight growling, like an old tramcar, but this is a definite 'knock'. Should we strip the hub, or let it 'develop' ?
We originally did remove the motor side plates, just to check there were no wiring/bearing problems (before even attempting to run the bike) and it seemed fine.
I understand from other past posts that some motors do make a slight knocking but this is quite loud, perhaps we should reposition the side plates to a different set of holes? Any tips gretefully welcome, thanks, silversurfer.
A friend has a Thompson Euro Classic (single speed, rear hub motor). The wheel spins smoothly and noise free, but once switched on (no throttle used), when the wheel is turned by hand it knocks, 9 knocks per rev. When motored on the throttle it makes an audible knocking relative to speed. When ridden it still knocks but it is not quite as noticable? perhaps the load/effort absorbs the sound to some degree?
It sounds as if the rotor/stator are catching? My Torq makes a slight growling, like an old tramcar, but this is a definite 'knock'. Should we strip the hub, or let it 'develop' ?
We originally did remove the motor side plates, just to check there were no wiring/bearing problems (before even attempting to run the bike) and it seemed fine.
I understand from other past posts that some motors do make a slight knocking but this is quite loud, perhaps we should reposition the side plates to a different set of holes? Any tips gretefully welcome, thanks, silversurfer.