Help with my pie...

[cobrapie]

Hi, I am a new member and have a Kmx Cobra fitted with the pie 1000 from goldenmotor running at 48 volts.

Great fun as you can imagine !! The pie is fitted to a 700cc rim (having trouble finding someone who is willing to resize to a 26"). It's a squeeze but 8mm clearence is fine.

The problem I am having is that the 'freewheel' well, doesn't freewheel. The original 24" wheel had a cassete so I bought a cheap 5 speed freewheel from Halfords just to get things going until the wheel rebuild.
It did initally freewheel for a few minutes, well 5 to 10 mins. Then the pedals just spin with the motor. I'm thinking it has over tightned ?? But I don't know ?? No marks of rubbing etc that I can see. No interference with the frame. Would a spacer help and are they available for a freewheel ?

This means that I have taken the chain off just to make life simpler but it just doesn't look right without a chain. I use a wheelchair and can't pedal at all really and my legs spinning with the pedals is just to painfull - but funny - people think I have been cured. I usually travel at 4mph so my trike is amazingly fast to me. But I would like the chain on so the other half could have a go.

Any ideas ??

Cobrapie.

 

[Scottyf]

You can't really over tighten the free wheel cassettes even with very powerful legs and muscles. Mainly because they tighten onto the Screw on hub.

The only thing I can think of is that the cassette does not quite fit into the gap and frame allowing it to free wheel. But as you've stated, there is plenty of room.

I take it the free wheel ratchet actually rotates correctly when not attached to the bike?

If not you may need a chain whip and a cassette romoval tool to remove the faulty cassette.


Picture would be great of the cassette and frame / spacers.

 

[flecc]

It sounds as though the freewheel free rotating part might be binding against a ridge at the end of the thread on the motor. It may need a ring washer on the inside of the thread to prevent the freewheel going in that far against the motor.

If you can undo the freewheel a turn or so from the motor and it starts freewheeling again, that's the answer. You'll need a freewheel removal tool for that of course.

 

[banbury frank]

Hi we have the same problem with our motors and some free wheels you find if you file a sham fir on the boss the freewheel screws onto it is OK

You need a tool to remove it the thread is a standard screw anti clockwise to undo you will probably need to hit the spanner with a hammer as they lock on very firm

Link for tool

eBay - The UK's Online Marketplace

Frank

 

[banbury frank]

Hi

Forgot the wheel rebuild

Wheel building, fixed wheels, e-bike, e-wheels, IGH wheels

Frank

 

[cobrapie]

Thanks for the quick replies !! I went to Halfords this evening a bought a freewheel removal tool, really easy to use and came off no bother. The freewheel had tightned up really snugg to the pie wheel and wasn't free to free wheel.
I'm rather embarrassed actually...... I was phoning 'round shops asking if they had a spacer / washer that would do the job, most said no and would have to make something to fit etc except Halfords who told me "they didn't have any at the moment..?!". Then I started thinking about those two washer type things that were in the original box - I thought they were part of the pedlec set up, but it kinda dawned on me that it is actually 2 ring washers !!!
My bad or my dumb.
Anyway popped them on and the freewheel is working as it should.... in all fairness the instructions never mentioned them.......lol

Cobrapie.

 

[flecc]

We've all been there and done that Cobrapie!

The important thing is that you've solved it, well done, glad all is well again.

http://www.sjscycles.co.uk/contact-us-artlcontact_details/