Hi,
I am having serious issues with the rear wheel now. Just went out for a spin (cant go far because of the motor) - but....
The metal tube must have moved up into the wheel some how. I lost all drive, the main gear was turning but there was no drive.
I checked the nut and it was OK (i put silicone on the threads). After I removed the wheel I could see that the metal pipe had moved forward and the main gear just sting on the splines.
A roller bearing had fell out. but I found it and put it back in. That's where the fun started because after I could not put the pipe back though the bearing !!!!!.
I soaked in in penetrating fluid and ran my finger though it for a while, and with a squirt of spray grease & with a little force it when though.
I have fitted it back on and seems to work OK. I really have to fix this its doing my head in.
It seems there is no support in the back side of the wheel, all the support is on the spines at the front of the wheel, I'm beginning to think that a part of the wheel in missing - like a bush or something.
Could you do a close up of the inside rear wheel for me ? I'll do one with a real camera this time (all pics so far have been with iphone).