Al:
Are my missing pieces called wrist pin roller bearings or just the wrist pin?
They would have to be the roller bearings if that's where they came from. Once you pull the wrist pin out of the piston you can tell better.
I can see it in you're breakdown pic #16 in the hole on the top of the crank. It looks like I need the wrist pin roller bearings and the snap rings to also. Could these wrist pin roller bearings be what went through my cylinder and was found in the pipe?
If there are NOT 2 of them holding the wrist pin in place, could be. Looks like a "C" spring clip.
I have a feeling that the wrist pin broke or maybe just the snap rings at which point the bearings got grinded through my cylinder. But the question is: where could the snap rings be?
I doubt that the wrist pin broke, you would have so much damage to the point that the rod could break through the case. I suspect the clips broke.
I sure don't see them anywhere and I don't hear them or anything else rattling around in the bottom part of the motor. The bottom part of the crank feels solid with no play as best as I can tell without doing the complete breakdown.
Get a pencil magnet and search for them in the case, unless you plan on splitting the case. Then you should see if they are there.
Thanks for walking me through this, you have been so helpful I feel like I owe you something. I have purchased a new China Girl to replace this motor for my bike already (waiting for delivery) but this engine really isn't that old and I wouldn't mind getting it running again if it doesn't cost too much. I think I will need a new piston with rings and new wrist pin roller bearings with snap rings. The cylinder looks very clean with no big scrapes like the piston has. I guess its because the piston is aluminum and the cylinder isn't so when the bearings got sucked through the engine the aluminum gave way instead of the walls of the cylinder. However, if I get a new piston do I have to get a new cylinder to fit it anyway? Are they built to fit each other? Or, in other words, Will the fit be off enough to make a difference if I try to use my current one?
Not really as long as the parts match.
By the way this engine has bearings and not bushings as I first thought. I have found a crude parts list for this engine. It says: "two 202 bearing Egrade and two 202 bearing E grade" for the clutch. It also says "one link and one link bearing." I suspect this is what they call wrist pin roller bearings because the term "wrist pin roller bearing" is not listed.
If this thing is too much cash to fix, I will just keep the engine for parts. On the other hand if I replace all this stuff with good parts I will have a better engine than when it was new. haha. In any event, I will mod my new China Girl before it goes on the bike for sure this time. I had no idea I had to prep these motors out of the box, but, well, looking back, I should have known. I will follow you're pre-install mod list and buy any stuff I might need from you if you have it. Helping people is far better than advertising!
