I was thinking about buying a KTM, and I heard that if I blow a piston, the sleeve has to be heated for removal and installation of a new one. Can anybody verify this? If so, I heard that it's difficult to find someone to work on this. Is that true?

 

that all depends on how much damage you does.. if you can stop your engine before she beats her self up then u mite only damage the piston and not hurt the wall or liner.. i am after overhauling many engines and just doing the piston and rings beause i could still see the honing marks on the liner. the worst fault about this situation is that every machanic got a different opinion lol. but if you did have to change the liner i cant see it being a big deal you only press it out and press the new one back in. sometimes they stick on me and i use a welder to run a bead of weld down through the liner on the inside and when it draws the liner will drope right out. i done a engine one time i made 9 passes before it dropped out, she was stuck really good.. hope this helps

 

You might do a search on maxpowerrpms website.They build the "IceCube" big bore kit that you just change out the entire jug and piston.Hope this helps...

 

A blown engine cylinder piston ring is a major engine mechanical problem that severely disrupts the normal operation of a vehicle's engine. Each engine piston has a piston ring that is responsible for sealing engine combustion gases within each engine cylinder, a job that is critical for maintaining proper engine power and function.
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I heard about this a week ago from my friend. Dunno if its true though. But I think, it will depend on the extent of the damage.