Thanks for the interest Guys.
Just a small post tonight. I was not that keen on the fuel tank or carb shown on the earlier engines so I decided to go for something similar to what I made for the Midget not least because I still had five of those miniature jam jars to find a use for!
Apart from having it screw into the cylinder head rather than use a flange mounting the only other real deviation was to have a lever to rotate the throttle barrel rather than using the actual jam jar. The CNC made quick work of this with a 3mm 3-flute cutter blending all the internal and external radii perfectly, I set the CAM to leave a couple of tabs so the part did not fly off part way through cutting and these were easily cay and removed with a needle file.
I used a piece of 8mm copper brake line for the exhaust which was filled with lead to stop it collapsing while being bent over a former. The lead melted out without sticking to the uncleaned copper so it was easy to silver solder on a short length of brass drilled 6mm and threaded M8 x 1.0mm so it could be screwed into the head and like the carb locked with a round nut with two spanner flats as I felt that looked a bit nicer than the usual hex nuts.
That just about completes the construction. I have test run the engine but did not bother to video it, these tests did show that it gets quite hot so my hopes to paint it in Kawasaki green have had to be put on hold as I felt some VHT paint may stand a better chance of surviving and their "kermit" green is not as bright
. Now that the paint has had time to harden I'm waiting for a bright day to take some photos before the paintwork gets mucked up with oil etc doing the video run but hope to have pics and a video for you soon.