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ProForm VR980 EKG (PFEX3311.0) Pedals/Crank Slipping

I have a ProForm VR980 EKG Exercise Bike (Model PFEX3311.0) and it is having a problem where it slips while pedaling. At first I thought it was the belt slipping but I took the bike apart and found that the crank shaft is actually slipping inside the hub. I suspect that it has something to do with the freewheel mechanism but this is where we reach the limits of my knowledge on crank mechanics. Is it possible that something just needs to be lubricated better so the freewheel mechanism "grabs" properly when pedaling or am I going to need to find parts to repair this?

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Sam A
Thank you for the update on the stationary bike drives system.

I think the problem may be with in the axle of the large drive wheel if it spins freely one direction and is suppose to grip the forward direction which means that the axle has a built in directional clutch that is slipping.

The problem is that many of these parts are no longer available for replacement on this model.

You may have to devise a way to lock the drive wheel and axle together so you can use the bike without the coaster feature.

Please let me know what you figure out.

Sam A.
by Sam A
April 9th, 2012
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