Just got a 2005 Predator 500 last week. So here's the deal. It was bought 7 years ago from an auction. The guy never touched it just sat in his climate control garage. It looks brand new. It hsd some wires cut which I rewired. It is missing the pouch with the inline fuse near the solinoid. But wire was bypassed. So here's what I've done. New battery. New spark plug with correct gap. Cleaned all hoses and took apark carb and cleaned jets 3 times until were clear. ATV has good compression. Try to start it and it just crabks and cranks until finally battery dies. All I got a couple times was a backfire so I checked to see if plug was fouled and wasn't. My question what's next? Possibly valves too tight from factory? Bad solinoid? Will it not start because of the pouch with fuse bypassed? Ahhh I'm so frustrated don't know what to do next??? Please help asap and thanks so much for any input!