Piston, Cylinder and Clutch!

Next step will be to add the clutch, a very small amount of grease on the crank shaft, just enough to lubricate the inside bushing of the roller:

Then comes in order, a thin washer and a nut that will be tightened, a beveled washer with a seal in it and the spring loaded clutch. Finally the nut that will need to be tightened as hard as possible to make sure the clutch does not slip. The most important here is to keep the side with a '+' sign facing outside so the clutch engages properly

Done!