hi guys, need some help or opinions here......got a 05 trx 450r, the bike hasnt done very much, i recently bought it off a boy that lives near by and i no that it was barly used so i thought i will purchase, when i got it i changed the oil etc, the oil was bad and like water but a good 5 hours use after the service everything was going sweet, was on our local track last night and my bike lost power, it would rev but take a while getting there so i stopped as i thought it might have overheated but it had coolant, oil etc was all perfect levels so i let it sit for 20 minutes and i started it up again, done a lap and it was still dead, the back wheels seemed to drag a bit when going over the jump we have which isnt that big but then it all came to a stop, spluttered and just dyed, i tried to kick it but the kick start was jammed tight so i tried push starting it and it fired up for a few seconds then died, i tried kicking it again and it wouldnt start, after 4 kicks the kick start was jammed again so i left it for a couple of hours and tried it again, started on the first kick for a few seconds then dyed, the engine is standard, warmed up everytime it is used, airfilter was cleaned when serviced and didnt fall off, i am getting all 5 gears as well, only thing i can think of is the big end bearing in the crank or the bearing in the inner casing has ceased or has tightend, does anyone have any ideas for me on this one? its not like a honda crank to go espically with so little use. any help is appricated

check the oil filter for metal.... if it does then you know what you have to do.