Originally Posted by
noddy2
Im'e working on it ! But it will take some time , I will try to find some video of the engine running also .
sorry I haven't had the opportunity to strip a motor for pics yet ,but to explain further .
If you look at the con-rod side on (the knife-edge) you can see that one side
of the crank-pin journal is larger than the other and sticks out more (the side facing the crank ) same at the piston pin journal end .
when viewed from above ,with the liner removed ,and the con rod held gently against the crank ,you will see that the piston is not central in the bore,and if carefully moved for and aft to take up play / allowable movement,it will,nearly touch the exhaust side ,but plenty clearance intake side .In other words ,when assembled the con rod is not in the middle of the bore !,the knife edge is closer to the back cover,the larger side is toward the crank and is machined flat,the smaller dia side is milled slightly curved and faces the back cover.
