125-200cc Husqvarna Sm 125 2008

Hi guys,

I bought a Husqvarna sm 125 motorcycle last year and after that, it has seized 2 times already and first time I drove 1500km and the cylinder made it so I changed the piston. The new piston lasted only 26km. Everytime it has seized the piston and cylinder had only marks on the exhaust port side.

Another thing I noticed with the bike is that the kickstarter fires back. So i checked if the ignition timing was off but you can't change the timing on this year model.

If anyone could help I would appreciate it.

Bike has a ktm 36mm Keihin pwk carb with a DEP exhaust system.

Hi, I had the same problem. But mine came from the mixed easter. It was a very bad quality one. Which one do you use. And do you do the mix in the tank or does the motorbike mix it automaticalli? Yoy better doit by yourself in the tank.

I use castrol power 1 racing oil and i mix it in the tank with 3% of the fuel and the fuel is 98.

What jetting are you using for that carb? And what are you doing about the sensor lights as a result? This is a long shot but would appreciate a response greatly.