Engine Details and Teardown

A few Friday nights, I got the bug and decided to disassemble the top end of the motor. I have been curious as to the construction of the top end, and in fact, wanted to take some measurements and weights of the various pieces. Here are a few photos I snapped as the top end came apart, then a few details of the individual items.

Rocker box bolts and valve clearance caps removed.


Rocker box removed, looking at the top of the cylinder head.


Inside of rocker box, showing tiny rocker arms.


Cylinder head removed. Note the three O-Rings, two are 10.5mm and one is 7.5mm in diameter according to the manual.


Bottom of cylinder head. Note recesses for the O-Rings, and the copper head gasket tucked down inside the combustion chamber bowl. This aluminum head has considerably more fin area than the cast iron head from the C100.


Cylinder barrel removed, showing the piston hanging on the rod.


Bottom side of cylinder barrel.


Yes...that's a quarter sitting at the bottom of the photo, below the piston. Piston pin to its right, and the two massive pushrods on the far right.