Got a 2000 YZ 426 with a chain-induced crack by the clutch actuator. Can't get it stopped with JB Weld so I bought a pair of used cases. The manual says, after taking it down to just the cases, that the right case will come off without a puller, then remove the innards and push the crank out of the left case. The removal and installation of all those innards has me nervous. Would it be wrong, once the right case is off, to place the new right case on the assembly, turn it onto the right side, pull the left case off the crank and install the new left case?