Hi. Looking for help here with my 2011 Grizzly 550 that has only done 135 hours from new. It has been playing up as sometimes it will tick over perfect, start it 10 mins later and it wont tick over. Switch off try again, still wont. Leave it 10 mins, it might behave it might not etc. On Saturday I fitted a brand new plug and old one was black and sooty. Fired up and ticked over lovely with new plug. Rode it for 10 mins, no problem. Put it away then next day, started it but yet again would not tick over. Sometimes it will just tick over, but I mean just. Then you could go to it 5 mins later and it will. It's driving me crazy. Any ideas please? If you just press the thumb throttle a tiny bit it will tick over. Ride it down the road and it goes like stink, so appears to be running just fine.