I have had endless problems with my 60v 2500w bike set up. Essentially the amperage seems too high for SLA to last beyond a few months.
So I went for Vpower - from Hong Kong via ebay. I thought that the guarantee inherent with ebay would be okay - but slight problems are causing problems.
I installed a switch rated at 50 amps and it trips after a few seconds on open throttle. The batteries are only rated at 40 amps. Is the BMS faulty? Should I get a new one? Are there any cheap ones?