Hi, since a cople of time my yzf250 2015 wont start by cranking it and i need to start it by compression by pulling it with my truck. It dont start even on hot summer days an when it start i need to rev it a lot for it to heat it because if i just let it on the idle it stale. But when it's been a a good 10 to 15 minutes that I ride it, the bike is fin. He keep is idle and start by the first crank. Finaly I change the spark plug and it didnt do anything and I always use appropriate gas for it. Thank you for responding me if this problem alreandy appen to you and if you know how to fix it, it would be really appreciate. Thank you!