I lost my first two HT's because of those dumb needle bearings on the wrist pin. On my current engine I replaced the wrist-pin needle bearing with a bushing. Mapbike this is by far the best engine I've had! It's smoother and better balanced, this might sound a little off but it's also got way more power too! I run this engine way harder than the first two and it's gone twice the distance of the first two engines combined. I'm all for bushings in these engines. I wanna try doing a crank job on it sometime, seems like it just might be worth it. Just for the guys wondering, it's the K-80 from BGF, the first two were PK-80's also from BGF. Ironic isn't it?