Hi guys, I just bought a WR450 '04 took her out for a spin and the decomp plug blew out. I noticed it immediately and stopped. I fixed that (checked the oil) and later went for another ride, after about 60 miles I heard a strange sound and then "pop" the engine shuts down. Now the kickstarter doesn´t move but the rear wheel isn´t stuck. Any ideas what the problem might be??? And what I could do???