Intermittent noise

Half Fast

New Member
Region
USA
BBS02 on tandem. Recently cleaned and greased both sides of the motor. We’re getting horrible sounds in time with pedal stroke, but not all the time. We’ll be climbing and it’ll start then stop for no reason. Riding flats and it starts and stops. Sometimes coasting for a few seconds makes it go away but it comes back after pedaling for a short while.

Had a different noise recently that I tracked to a stripped thread in one of the holes for frame clamp thingy. Rotated clamp, used the good hole and used hose clamp to attach to chainstay (see photo). That seemed to solve the problem but now there’s this new noise. Of course it won’t make the noise on the work stand.
 

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Suggest you get a bigger screw and tap the motor case for it, It's not hard to do, and you can buy the tap/screw and tap holder at Lowes or any hardware store.

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Also use enough washers so that the plate is parallel to the frame and motor. The way it is now, the motor is only secured at one point on the side opposite the chain gear.
 
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