Hang on You are not allowed to criticise Rotax's. That Bloke's just trying to sell his product in super dumbspeak. Years ago Harley went to Splined Pins that Broach the spline in the wheels, when pressed in and it cannot move by twisting but it's a Once only thing, done at the factory with special alignmment presses. The whole shaft and rods assy must Be replaced but at Much the same cost as a normal rebuild. The usual term for that type of rod is Fork and Blade. A couple of small weld runs won't last Long as a repair. The Flywheels are steel forgings with the Mainshafts integral..The assembly HAS to be built up as the Big end Bearings are caged Rollers. Nev