Ok just ordered a Motobatt.
Main reason is bike has recently become much harder to start after I noticed two of the cells in my non maintain Yuasa had dropped seriously low. Topped it up again and get ok cranking but wondering if voltage is dropping off during cranking and affecting the Boyer system I now have and thus poor starting now.
May be old fuel having not been used all winter but I hated that Yuasa battery anyway as the opaque case made it really hard to see the levels without taking it off the bike each time.
Anyway the Yuasa is 3 years old so probably due a change, can’t do any harm I am thinking