Jawa 350/639 engine dismounting Part 3 (No Guide)

This is the 4. video from a series of Jawa 350/639 engine renewal videos. This time we are going to remove the pistons and cut the engine into half with one selfmade tool. (Please excuse the low quality, although now it's a bit better than the engine removal video.)
Please note:

THIS IS NOT A GUIDE ON HOW TO DO IT!

Toto je 4. video zo serie o renovacii motora Jawa 350/639. Tento krat stiahneme piesty a rozpolime motor vlastnorucne vyrobenym pripravkom. (Prosim ospravedlnte nizku kvalitu videa, aj ked je to teraz lepsie oproti videu s demontazou motora. Kvalita je teraz lepsia, no kedze mam hardwarovy limit, tak to uz takto ostane.)

Prosim berte na vedomie, ze toto NIE JE navod ako na to.

Next parts:

Engine into the frame and start

Mounting the engine together

Mounting deadmass compensating panels

Removing the crank, comparison btw. serial and sport crank

Parts before:

Dismounting primary gear and clutch

Dismounting some basic parts, cleaning the engine

Engine out of frame

#motorcyclevideos
#motorcyclerepairing
#motorcyclerestoration
#motorcyclerepair
#motorcyclemaintenance
#motorcycleromance

[CZtuner]

8:25 The quicker method (that most people use) is to place a piece of long wood against the right hand wall of the carb well / carb bay and hit it with a lump hammer until it comes a apart. This method takes 20 to 30 seconds and does zero damage, which is why most people use it.

I've been rebuilding Jawa & CZ engines for 40 years and have always used this wood & lump hammer method.

[CZtuner]

The metal seal ring has drifted out enough to jam against the rotor locator peg. Driving it back in slightly will release the locator peg.

[CZtuner]

It is important to account for all 28 needle rollers when removing a piston, because any remaining loose in the engine will wreck it.