Talked to the importer in Sweden, he has so far not sold any replacement pistons or valves to the TE250-05's, the only thing he mentioned was the crankshaftbearings on the TC, but they run +1000 rpm's higher. He says +100 hours of enduro riding are a no problems at all, but off course it's in his interest. So It might be a good idea to check this after 50 hours or so. But with house, kids and wife dragging money from my pockets I cant afford to have a serious brakedown on a 4-stroke, a brakedown off a 2-stroke are way cheaper. The handling, suspension and ability to stick to the lines are brilliant on the Husky, lets hope they prove reliable as well, cos they are worth it.
Anyhow, keep puttin in your experiences on this forum, I think we all can learn as the miles pass on by.