My 2019 SP died last weekend, absolutely nothing. A simple load test of a fully charged battery remove from the bike showed voltage collapsing. So hopefully only a new battery is required. The problem now is the SP (S1) comes with a HY93-C lithium at a price of £300 - £450 for an o.e. part, direct replacements are thin on the ground. How ever a lithium upgrade for the standard RA model YTZ7S is only around £100, has any one else used this alternative successfully or can you suggest something else.
