My worst bike ever is my 1974 mx250 yamaha. It never blew up, no matter what kind of torture that engine put itself through. Here's the typical ride: 3rd kick cold and it fires up at about 6,000 RPM. The silencer blows off onto the ground. You touch the kill wire to the handle bar a few time to slow it down. put it in gear and take off. you hit fourth and there is a terrible noise in the tranny like a piece of metal inside a meat grinder. As soon as you get it into 3rd or 5th, floor it and it hangs wide open. no brakes. you pull in the clutch and coast to a stop while the motor is screaming at 15,000 RPM with no silencer. :eek: You find neutral and then touch the kill wire to the bars. Nothing. The psycho didn't need spark to run. so you find 5th gear, park the front tire into a tree, and pop the clutch. finally your safe! :worship: That motor must have insides of of some secret un-breakable steel.! I'd like to see any bike run stopped in neutral wide open for 5 minutes without blowing up. It is in my shed right now with a rusted magneto, but it will easily start up with a little sand paper. It makes 2 horsepower until about 6,000. Then it shoots up to the scariest 26 horspower you have ever felt :debil: People who think the 490's are terrible have never owned a truly psycho bike. My 490 is as safe as an pw50 with training wheels compared to my 250. I can still hear that beast screaming in my head. :ride: