Join Date: Jul 2006
Location: Atlanta, GA, USA
This thread certainly went down a different road, but all the information is certainly interesting.
Got it all put back together. I think it was a good thing that I took it apart. The vertical cylinder was caked with oil, maybe from the broken rubber valve seal. When I took the piston out, it looked like the valve had contacted the piston at some point, see pic. Maybe the contact with the piston caused the piston to rock and preceded to blow by oil.
Anyway the bike was running ok except for the loss of about .5 qt every 2k miles.
I inspected the bores for any disturbance, ovality, and taper. Everything seemed to be inspec, so in went the new pistons.
Started up, smoked off the assembly oil, and all is well except for a slightly rich vertical cylinder. No oil is getting through on the vertical anymore thankfully.