2014 honda trx450r fmf f4 slip on, fmf jet kit, uni airfilter with prefilter
I was riding my 2014 trx450r on fresh oil and filter and cleaned my air filter, I still have my oil. I ride for about 1 hour and I noticed something like a bolt was loose or something but it wasn't vibrating, so I rode 2 laps on the motocross track there, I went up a small hill and it slugged when I was about to be st the exit it shut off on me, and when I went to start it it sounded like a weak battery, I have gas, or refilled it up to a full tank earlier and it started up almost immediately and I let it warm up I rode easy on it till I hit the mx track, I think it's a top end rebuild cause the gears work fine and bump start wouldn't work even in 3rd, didn't try 4th or 5th. I belive it's a top end rebuild but I just want to know for sure cause I've never had to dig into this motor, aswell as I've changed the oil regularly ever 6 hard rides on synthetic oil, it's all stock motor wise I belive. Another thing is, there was oil on the swing arm but the cases are in tact and it looks like oil splattered up cause it's on the bottom of my airbox and all over my case breather.