Here I go again, reviving an old thread, my ZX50 is 3 years old now and until I fitted the 50mm cylinder kit, it had been starting the scooter, though at times it was very dificult to start. After fitting the cylinder kit, it is just too much work for the battery, so I kick start. Am looking for a new battery, will try to find one a little larger that will still fit in the recess and will hopefully be able to start the scooter. With regard to the older, larger bikes requiring an artform to kick, a bloke at work saw me start the scooter today and said "that's cheating", he reckoned it started too easily, he rides a Royal Enfield Bullet Sixty Five, reckons if you don't get it right, it could throw you over the handlebars.