My fellow YZ426 brothers will like the MX Action Magazine write up of the Husqvarna TC 450. One part goes like this: Q: How does the TC450 engine run? MXAMAG A: Like an old-school four-stroke. While we love the high tech powerbands of the CRF450, RM-Z450, and the YZ450F, we still have fond memories of the tractor like four stroke engines of old (as far back as BSA or as recently as the YZ426F ) . You know how those bikes felt. When you twisted the throttle, the rear tire dug a trench.