Replace that primary belt drive system before it fails and install the db DirtyBike Industries Gold Series 219 primary chain drive system.
This system is much quieter than the 420 kit and comes with either stock gear ratio or a gear reduction.
It features one-piece steel sprockets with improved heat treatment, a KMC 219H chain that is stretch resistant, sprockets designed for more adjustment and longer life, and is 20% lighter than the stock belt system.
We've been racing this kit with an aggressive 17Kw tune for a while and it's proven to be extremely durable. Compatible with Sur-Ron Light Bee and Segway X260/160.