Bosch performance cx stiff motor

Vcec

New Member
Hi hope someone can help

I have a Cube reaction hybrid pro 500.
If you roll the bike backwards it's as if the brakes are binding, push forward it's fine. If you lift the back wheel ( motor off ) and peddle forward it's fine if you try to turn peddles backwards it stiff.
Even if you take the chain off and back peddle the bottom bracket is stiff.
Surely if it bearings it would be stiff in both directions.
Any idea anyone.


Thanks
 

rich c

Well-Known Member
Trying to remember how my 2016 Haibike reacts. It will turn the crank backwards when I push it back, I'll check if it does it every time. I have a hunch it has to do with the gearing in the motor. One revolution of the crank is something like 2 1/2 revolutions of the chainring. I have over 3,600 miles on one, over 3,100 on the other.
 

Vcec

New Member
Did not do it before, when I push the bike out of the garage backwards it will not roll, it will roll forward, my other Cube has done about 1500 miles and is fine
 

rich c

Well-Known Member
Did you get the motor really wet? Submerged? Here's a video showing what water can do and what bad bearings sound like.