I disassembled my engine too inspect it :-)
It is very nicely machined, so the parts fit are great.
It uses the traditional setup of a 4 stroke engine, so it is easy to work on.
There is a hole machined into the rocker box connecting the intake like the newer OS glow engines which should pull lube oil from the crank case throgh the cam parts, and valve train, so that is pretty nice.
But, out of the box, it is bone dry in the rocker box , and that sucks.
So I would deffinatly reccomend to open it up, and lube everything in there.
The cylinder/piston , crank, and cam were lubricated....I hope they did this before running it at the factory.
Many of the bolts need to be re-torqued.
It seems that the gaskets have compressed, and the bolts have loosened up.
The cylinder block bolts to crack case could be tightnened a little, also the back case cover.
But the cylinder head bolts were ok, becase there is a metal packing there which does not compress.
Also the intake tube between the carb and cylinder was loose, becase the teflon isolator block had compressed.
But on the right side cam cover the screws were only hand tightened.....first I thought I had taken the wrong hex key because it felt like it was not grabbing......but the screw was just turning freely :-)
So tighten all screws.
There is a grub screw in the rocker box which holds the rocker arm pivot shaft, and it was so tight that I could not loosen it.....but that is a good thing...it will stay put :-)
The cylinder head bolts are undernieth, but you can still get a hex key on the bolts without removing the shaft.
My cam shaft was 1 tooth off.
That is also the reason that I wanted to take the engine apart, to see if I could get it perfect.
You lign up the TDC mark on the prop hub, and the dot on the cam should point streight down on the molded line of the cam box.
And I could move it one tooth to align perfectly.
Mine was one tooth more clockwise out of the box.
You can always wonder if this was done on purpose, but I doubt it :-)
You can very easy install the cam a tooth wrong if you are putting these together in a hurry.
We will se how it runs :-)
Out of the box, the valve clearance is set very tight, and seems ok.
Valves are not mistakenly held open.