What??? RLtoFixYa doesn't know what they are talking about. Your problem is a faulty/broke "one way roller clutch" which is threaded onto the rear wheel. I've already replaced 2 on my son's MX500.....
If the chain is moving but the wheel is not there could be a few different things wrong.
First and foremost ensure that the chain is on both the front and rear sprocket. If it is not on both correctly by the teeth of the sprocket in the links of the chain then the wheel will not spin.
If the chain is on the bike, check to ensure that the bike is in gear or the clutch is disengaging. This will be a bit more difficult and technical know how. Ultimately, if the chain is not the problem you could have clutch or transmission problems. Both will require the engine to be removed and inspected internally.
Hope this helps.
I tried the WD-40 solution but no luck. My MX500 was less than a week old. I called Razor's US hotline at 866-467-2967 and they are UPSing me a new rear wheel assembly for free. They did ask if I tried the WD40 and I explained I had. The operator said the rear wheel assembly was probably "stripped out."
Ps: I saw a YouTube video of the welded wheel. I think it would work but potentially cause more problems down the road. The intent is for the chain to be able to spin backwards - also, the weld would cause a lot of torque that could burn out the motor. That's just my opinion though.
It is the rear freewheel assembly causing the problem. if is fixable, but you have to be good with tools, the bicycle shop and the electric bike shop both said they couldn't fix it, but is is doable. 1. you need a special bmx tool that fits that back wheel, your local bike shop should have it in stock. 2. you need to remove the freewheel sprocket and disgard it along with the the bearings (make sure to unscrew the razor chain sprocket from the freewheel assembly and secure it for reuse). 3. either purchase a new freewheel sprocket for bmx wheel or remove one from a old bike (again you will a special tool for that). 4. screw the razor chair sprocket onto the new BMX sprocket (it goes on with the same 4 original screws, right over the sprockets. 5. Screw the freewheel back onto the rim now. tada its fixed.
SOURCE: Chain and Wheels
thank you for using Fixya. the issue you are experiencing is pretty much your free wheel. If it is new, it may have been installed the other way around or the clip in the assembly that serves as a spring for the chainwheel to lock out has been worn out.
Best if you will be able to remove the rear wheel and then check the whole rear hub assembly starting with the freewheel and the axle.
SOURCE: wheel does not turn when peadalled
needs a new sprocket on the wheel the teeth inside are worn
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