These cheap Chinese made hydraulic 12 Ton presses are ideal for lots of fitting jobs. Especially flywheel main shafts where it is unlikely to be bigger than about one inch diameter. They are made cheaper than I could possibly build one for myself.

 

Plasticine is ideal for making a model of the combustion chamber. It is often different in positive form than you imagine from the negative concave shape.

 

Filing a keyway in hard steel is not easy- I found a carbide file was the only way.

 

 

 

 

 

Big lump on the piston tends to mask the spark plug...in fact I am having to use on the flat surface discharge types because things are so tight the piston suffers from spark erosion

 

Flywheel flank is relieved at the main bearings

 

just bought a 50ml graduated cylinder to accurately measure the combustion chamber