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Sorry, try again. I haven't had to do any wrenching on my 4strokes. The KTMs are especially bulletproof ironically. Don't get me wrong. I love 2 strokes. I cannot say with a straight face that they are better in any real world way to a modern 4stroke MX bike. A KTM 250F is a phenomenal bike. Aggressive, powerful, stable, easy to ride fast. Mine has tall 5th and 6th gears for transfers and road sections, magic button. No jetting to fuss with. (I did have to dial in the TPS setting though). Platable. For me, 2 strokes are an exciting page in my riding history...