Well after my battle with the nut, I finally got the top end off.
Took the jug off, got the piston off and looked at it. Hrm, not to bad, was scored on one side and the ring had almost been welded right into the skirt. So I look into the jug thinking the worst. The jug is fine, not one single scratch or mark anywhere. Now its really got me thinking. What made that mark on my piston? So I start playing with the powervalve, because... well its cool to see parts move around. And I notice that the powervalve rubbed against something cause the part closest to the piston is all mashed up. I'm thinking how the hell did the powervalve come in contact with the piston? After playing with the spring I figured it out. The powervalve snapped in two!! And thats what toasted my top end. This is the second time this has happened since I have been the owner of this bike. The powervalve was replaced by my mechanic 2 years ago along with the current top end. What would cause this thing to just snap in half? I use a quality premix/gas combo running at 40:1, so everything gets lubbed. I'm not about to replace this powervalve to have it just snap again, there has to be a reason why it broke. Eric? Rich? I'll take some pics of the powervalve and the piston, there has to be a reason for this...
Took the jug off, got the piston off and looked at it. Hrm, not to bad, was scored on one side and the ring had almost been welded right into the skirt. So I look into the jug thinking the worst. The jug is fine, not one single scratch or mark anywhere. Now its really got me thinking. What made that mark on my piston? So I start playing with the powervalve, because... well its cool to see parts move around. And I notice that the powervalve rubbed against something cause the part closest to the piston is all mashed up. I'm thinking how the hell did the powervalve come in contact with the piston? After playing with the spring I figured it out. The powervalve snapped in two!! And thats what toasted my top end. This is the second time this has happened since I have been the owner of this bike. The powervalve was replaced by my mechanic 2 years ago along with the current top end. What would cause this thing to just snap in half? I use a quality premix/gas combo running at 40:1, so everything gets lubbed. I'm not about to replace this powervalve to have it just snap again, there has to be a reason why it broke. Eric? Rich? I'll take some pics of the powervalve and the piston, there has to be a reason for this...
