I changed the oil in my 2008 Rincon tonight. I always have a hard time getting the oil level right where I want it and having to let it idle 5 mins then let sit for 2-3 mins each time to check the oil and it idled on and off for about an hour as I would add to much oil then suck to much oil back out through a long hose and so on so I could tell the engine was hot as the fan was kicking on and off quiet a bit then I noticed it was low on coolant so I added some to it. Well finally I got the oil level where I wanted it and was fixing to take it for a spin and I bumped the throttle for the first time after all that idling and it pop/Backfired real loud 1 time right between the 1st and 2nd quick throttle bump and run fine afterwards as I took it for a short spin at wot. It only has 258 miles on it and has never done this before. Does this sound like it might be a problem and any idea what caused it to do that? The Engine knocks kinda loud but the dealer said there was no problem with it last year as I took it to be checked out and valves done but Rincons are known for the loud noises so I have know idea what caused it!! THANKS!!!