My Warrior engine has a knock that seems to originate from the bottom end. Compression is at 140PSI and it seems to start and run as normal. Are there any common issues with these that i should look for?

 

Check the oil.

 

That's the first thing i checked.

 

Put a socket on the crank and turn it by hand against the compression back and forth. If you hear a knock or tap, then the problem is piston slap.

Also, if the knock is louder when it is cold, then it is most likely piston slap. It may be time for a fresh top end.

I wouldn't think that the low end would make noise. Usually, that's solid unless yiou ran it out of oil.

 

I puloled the motor out and began disassembly. I have not pulled the cases apart yet, however, everything turns nice and smoothly with no noticable crank or rod play. The cylinder is std. bore and measures at 3.265. Piston is good but ring gaps are in excess of .020. the only thing i found that could cause a knock is that the clutch basket had a lot of play and can be rocked back and fourth. I don't know if this is normal of not. Any suggestions? Should i go ahead and split the case. Valves were adjusted within reason and timing chain is ok. HELP!!!!!

 

I figured it out. Looks like the piston pin is loose on the rod.