So I was riding my 1997 RM125 on my usual trails and I got a little bored so I hopped on the road to go somewhere else (the bike is NOT street legal) All was fine on the twisty little back roads but I found myself on a strait stretch that was posted 55 mph. I took the little guy up to 69-70 a couple of times (iphone speedometer app) and then it just died. I pulled off the road and into the brush a little ways. The kickstarter was a bit stiff but it soon turned over ok, but it was lacking in the compression department. It wouldn't start so hid it and came back with a truck. I went to put a new spark plug in and found the existing plug a little loose and it had no gap. I stuck a new plug in and with much trouble it started a couple of times. I let it idle for a few minutes but when I gave it some gas it would just die or backfire and die. It sounded different too. So did I have a partial seizure? Do you think a top end rebuild is all I need? Can you deduce anything? This is my first twostroke and I've never worked on one before. Advice is appreciated! This what I get for riding on the road!