Recently the battery would not charge more than 70%, then 60% usng the orginal 5amp charger.
Oakley Motorcycles in Maidstone tested and reported the battery amd management system were OK but the charger was failing.
They advised a replacement would cost £550! I said no, they said "Good, because we cant get one".
The only one I could find online was from Ali Express. Cheaper but still £194!
After 6 or 7 weeks it arrived. It works well as you can vary the charge rate up to 12amp with a rotary contol and LED display.
Battery now charges to 100%.
But the charger is twice the size and weight of the original so no longer fits in the "tank".
gerryjenks