4 stroke 50cc Super mini bike

[rzsmith]

Changed the belt 3 days ago. Went from doing 50mph to 20mph on flat. Insanely frustrated. I know car engines, have no idea what I am doing with the 50cc. The belt did snap while riding at about 60mph downhill. Did not remove the V so I assume the rollers are in the same position. About to throw this fucker in the garbage and lose 1300$. Halp.

If it helps at all I am posting the bike.


www.belmontebikes.com/products/new-df50sst-50cc-super-bike-ninja-scooter-moped-bicycle-with-cvt-transmission-electric-start

[gsx600racer]

Did you remove the variator when you changed the belt ?

If "NO", chances are the rollers in the variator are not positioned properly.

[rzsmith]

I did not remove it, could it still be the rollers? Would that cause me to lose that much on a flat? 30mph difference seems steep over just rollers! As I said I have no idea how these engines operate. I can swab a b16 in a moments notice so I assume these should not be that complex.

[rzsmith]

Double tap the post. How SHOULD they be positioned?

[uglo]

Has to be the wrong size belt.. or you've got some serious roller issues. Or your clutch is slipping like mad. Excessive amount of dust in cvt after changing belt?

[90GTVert]

When the belt breaks, the rollers can get out of place because nothing is there to keep the variator pushed back. You can also get debris in various parts. If I break a belt, I clean the entire CVT.

[rzsmith]

So i finally got around to ripping this scooter apart, Cleaned the clutch the variatior, Noticed the rubber clips that support the rollers were missing. Replaced and i am now happily cursing at 35mph. still 10 MPH lower, but i am gonna tweak and tune to get everything adjusted!