After assembling around the valve, adjust the valve timing.
Crank timing can be seen by removing the right side cover.

Adjust this to the location of the top dead center mark.

The cam side, align the line engraved on the cam with the joint of the head.

And I will tighten the cam holder.
However, if the cam chain tensioner remains loosened, the cam chain will come off the cam gear.So, tighten a little bit and tension the cam chain tensioner.
I did not know that we had to tighten the cam holder while tensioning the cam chain tensioner.So, I have spent time idly again.
When I finished tightening the cam holder, a timing was crazy for some reason!

However, although there were twists and turns, it was completed.
There are things of only in-line 4 cylinders.It can blow well up to the top.

Because the piston fits into the cylinder, I will assemble the head.

I kept shim and valve lifter in the paper cup and I will return it to the original place.
If I do not return it to the same place the valve clearance will change.
I have to make sure not to make a mistake.
I am writing a place into a the paper cup.

By the way, the valve clearance examined on the net is ↓.
IN・・・0.17mm～0.27mm
EX・・・0.20mm～0.30mm
It is quite wide.Moreover, the allowable range is wide.

Because Cub is around 0.05 mm, it is about 3 to 4 times.
Because the port is long in the longitudinal direction, the valve will also become longer and linearly expand.
The other day I did the valve rubbing, but I can only sharpen at 1/100 units at most.
So has no influence.

I do air blow one by one and assemble it.
I am careful that I fly it and do not lose it.