Head Comes Apart

All the valves need taking out and clearances checked.

Gear Box Components Out

For vapour blasting all the internals need to come out.

Including this roller bearing that supports the gear selector drum.

And How Are Things Inside?

Quick look at the pistons: they have very few marks on their side but are quite sooty. I guess they were quite carbonned up, even though the mileage wasn't high. I sprayed WD40 into the barrels several times over the years to stop any corrosion and that's a good way to loosen up the deposits. They are very soft now.

To get the crank out it was necessary to take off pistons 1 and 4.

Cases Ahoy!

Now to get the cases apart and not to forget all the bolts top and bottom and the retaining plate clutch side. (Click on images to enlarge)

Sump Comes Off

Lets see what's happening in the sump - always tells you what's been going on in the engine:

 There was a little bit of gunk in the bottom - nothing to worry about considering this motor has been idle for at least 15 years.

And with the filter, I took the mesh off and there was nothing in it at all.

Tacho Drive

Looks like new rubber seals in the tacho drive are needed. One seal and one O ring.

Barrel Off

Head came off easily but the barrel didn't want to move. Lots of gentle knock with bits of wood and even a bit of levering.

Ready for taking to the vapour blaster.

Head Off (1,523 Days into the project - how bad is that?)

Got the head off. I was very surprised at the carbon build up on the pistons and combustion chamber for such a low mileage motor.

 Honing still visible:

But the cam chain guides show very little wear: