Drive sprocket wobble

I noticed my chain was pretty loose and my 77 e50 maxi completely down on power. Took off the air box and revved the engine and the drive sprocket is wobbling all over the place. Where do i start?

Re: Drive sprocket wobble

I can provide a running video, but all it will show is the chain whipping about, resulting in it dragging on the pedal posts, running guards and airbox when they are in place(edited)

Re: Drive sprocket wobble

Need to split the cases and replace that bearing

Re: Drive sprocket wobble

If you keep running it, you're gonna be replacing more than one bearing. I would rebuild the whole motor anyway.

Re: Drive sprocket wobble

if the final output shaft aint rockin than its slop on the sprocket, just get a new sprocket and some new clips n adjust yr chain tighter, u might as well get that seal if its leaking 17 40 7.

Re: Drive sprocket wobble

todd amundson /

That’s normal.

It’s science.

Re: Drive sprocket wobble

Its just the sprocket thats moving, not the shaft, how do i go about replacing the sprocket?

Re: Drive sprocket wobble

Overpriced Parts /

> Mike Flynn Wrote:

> -------------------------------------------------------

> Its just the sprocket thats moving, not the shaft, how do i go about

> replacing the sprocket?

Remove the circlip and pull it off

Re: Drive sprocket wobble

Would bad engine bearings cause the moped to mis/backfire at around twenty? Also my friend thought it was a blocked exhaust, so he took it off, it went over 20mph, did 31. But as soon as it hit 20 the exhaust noise went from deafening to almost normal.

Re: Drive sprocket wobble

> Mike Flynn Wrote:

> -------------------------------------------------------

> Would bad engine bearings cause the moped to mis/backfire at around

> twenty? Also my friend thought it was a blocked exhaust, so he took it

> off, it went over 20mph, did 31. But as soon as it hit 20 the exhaust

> noise went from deafening to almost normal.

Sounds like your pipe needs an oven cleaner treatment . That should bring it back to something 'normal' .

Re: Drive sprocket wobble

Baron Von Hamilton /

It is super common....new sprocket and clips.......one of my friends texted me with the same problem and similar video...he swapped sprockets and was all good.

Re: Drive sprocket wobble

new seal backwards too! and sprocket does wiggle a little, normal.

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Re: Drive sprocket wobble

Okay so ive done so more research. Im definately fourstroking at 16-20. This with a combo of the bad sprocket explains all my problems.

Re: Drive sprocket wobble

What size sprocket should i get? Any suggested ratios?

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