|Originally posted by zkhennings:|
Ah that blows. I was really hoping to see this finally get buttoned up. There are .002 oversized OD rod bearings for the LZ9, I would imagine for LX9 too. You could probably get the single rod bored out and run that bearing, but I think you would need to get the crank journal taken down so I don't know if that's worth it. Might be easiest to see if you can replace the single rod.
For what it is worth it is not very much money to have a machine shop verify all the clearances and make sure parts aren't twisted or out of spec. The machine shop I use will even measure my dirtbike cylinders for free and check them for straightness and out of round. Plastigage is another good tool to get a ballpark idea and just do a sanity check. And finally I plan to send my torque wrenches back to CDI for cal before I start bolting my motor back together as it has been a few years since they were checked.
That really sucks though I was very sad to see that this happened.
it's bummer, but it is what it is, if I had more time, I would fix it right now, but it will have to wait until I move. the worst part is not knowing definitively why it happened. At this point I'm looking for a new short block, it will be faster, and easier to swap in than to rebuild this one. and if I snag a different cam, I won't need valve reliefs either, which is another plus that expedites things. my biggest concern at the moment, is if the increased piston travel due to the failed bearing damaged the head, then my ported heads will either need to be repaired or replaced. that said, I measured for and cut valve reliefs without head gaskets, so there should be ~.035" more clearance than I cut. not sure what piston to deck looked like, I don't remember measuring it, the cap side of the bearing was about 1/2 way into the rod end, so hopefully it was enough to squeak by. I potentially have a line on another short block already, it's already on the other side of the country, so that's a plus right?
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