Hi everyone, A friend and I rebuilt a Trx 200 for his dad.Machine was smoking bad so we had the cylinder bored .50mm over.New piston,rings, gaskets,and cam chain,lapped valves and new valve seals. Machine cranks,idles,and runs great.Rode it around gently to seat rings and appeared to have done so.Had a little smoke at startup but none after that.Now when machine is rode it will overheat to the point of melting plastic on inside of fender and fuel tank will be extremley hot to the touch.Hope someone has an answer for this.I have rebuilt hundreds of Honda atv’s over the years and have never seen this.Please help. Thanks Glenn