My super 9... Pain to start

[Kernow70]

Got my lovely 2007 super 9. Fast little scoot and 6000 miles from new.
Using an ordinary battery it sounds as though the battery is dead. Very slow turn over.

Bought a new battery and same thing. Kicked over fine until the kick start decided to break....

Took off the kick and the electric start still the same so I got a big car battery  and jumped it to see and it turned bike over.. It did no probs.

So in short hard to turn over with the right battery but jump off a car battery and it starts fine..

Any ideas?? Thanks in advance

[JJJoseph]

I've had this problem and the cause was the starter gears were full of rubber dust from the belt drive. For me it happened first about 7000km, and again about13,000km.  Take off the belt cover to expose the starter gears. Wash off the gears and spray with oil, and it's like you have a new starter.

[Vivo]

Nice tip...