My 4G T belt gave out on me the other day & been looking for a decent transmission for my HuaSheng 142F. Thinking of using a $30 pocket bike 'gear box' transmissions becuase they are cheap & seem easier to repair/replace if they ever fail. So has anyone ever hooked up a pocket bike gear box up to a HuaSheng with good results? Also which ones actualy can fit my motor? I'm looking for one that can run a 410 chain because those 415 chains seem too wide for comfort & I have a 3 wide tire on my bike.