500 efi sportsman 2006

So i have a 2006 sportsman 500HO EFI. it started last week while ice fishing. I can hear the fuel pump prime everytime the key is turned on. it will not start without pushing the throttle in (1/8 throttle). Once at 1/8 throttle it starts and will run but not idle if the throttle is let...

I shut off the quad and now it won't start. 06 500 HO EFI X2 Turns over but won't run, smell fuel and I would get a backfire or two Checked fuel- ok Spark-ok Injector- ok Moved on to checking timing and valve lash clearance Ok, thought maybe the chain slipped, but timing is ok per service...

QUSTIONS: Has anyone had these issues? I went thru my quad to check/service the grease fittings etc. I found the rear brake hub/rotor to be loose. All 4 bolts that bolt the rotor to the hub were loose and the possibility of the brakes malfunctioning I think was high. The only way I saw this...