Hi all,
I have a 1988 XT600 going through a complete rebuild, the top end is off to the machine shop for a big bore 11.5:1 along with head work. Now that I have gone through the process of splitting the crankcase, I am finding that the LH side (timing chain side) bearing is fitted to the crankshaft as opposed to the the crankcase, as is the case on the RH side. The timing chain gear also appears to be pressed on as well. As I carefully go over the procedure in the Clymer manual, I find that in one step the bearing and gear are on the shaft, in the next step the bearing and gear miraculously disappear. Nowhere in the book is the removal/installation of these items is covered. Much to my dismay Yamaha does not sell this bearing, it is listed as an integral part of the crankshaft LH side, i.e. you want the bearing, you must buy the crank half along with it @ $258.00 USD. Damn!! all the other bearings, seals and crankpin already cost me about $300.00 These are definitely two different bearings with different numbers. Has anyone got any ideas on how to avoid a new crank half, wihout doing a half-ass rebuild?

PS- the manual lists a SST to pull the crankshaft into the crankcase on assembly, they also show a homebuilt version of this tool, but very unclear instuctions on how either is used. Anyone have a hint?

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