So i popped my top end (airsal) off tonight to see why i lost like 10mph on the way back around the lake from seattle monday night, and this is what I found
whats wrong with this picture?
The pin had melted/worn one side of it's seat way out of round and off center. I can't believe i made it home. Thankfully i have a spare piston. I was reading this thread the last couple days, so I just drilled these, hopefully they will help.
I managed to come through pretty clean on the other side, and an old wrist pin slid right through, but i'm worried they might scratch the new one, any tips on cleaning up the pin bore other than some fine emery cloth?
I still have to address what I think may be the root of the problem, and that is the brass con rod bushing is worn a bit out of round, i can wiggle the wrist pin in it a little, i figured the tolerance was pretty loose to allow for thermal expansion, but how much play is too much?
And for the viewing pleasure of folks who have not seen them here are the double all the way through the side of the bore oil holes on the stock piston, i wish i had the tools to replicate these:
(#22 2hp high torque, dykes 'L' ring flush with crown)
