Crank Smash
Disassembely after the chain derailed on the front sprocket. I found out two engine mounts are cracked, dont know when that has happened, could be years ago. Click an image to view a larger version
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Engine casing crack
The crank casing is cracked 
after the chain derailed on the front sproket. 
After I took of the heads I found the pin-bolt that goes through the con-rod was missing one clip!! Very lucky the pin-bolt didn't move into the cylinder-wall
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Cylinder and piston
One of the clips that holds the pin bolt in place have started to move and disformed the groove and then jumped out into one of the ports. This must have happened when the piston was going up and the clip has gotten down into the crank where it has found it's way up on the other side of the piston. So I got both sides of the cylinder brused.
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Coming back together
Starting to put the pieces back together, finaly! After getting the engine back
Put new piston in the scratched cylinder, and now the engine is pulling stronger than ever 
Cost
Crank case welding AU$ 120
Some seal maker AU$10
Nautral sensor AU$??
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