Here's what I'm starting with. Jet 200 purchased locally in Los Angeles...
![Image](https://farm5.staticflickr.com/4413/36753797022_6844726938_b.jpg)
I was going to wait to post until I had a bit of significant progress, but I've some hit a few bumps in the road so i figured I'd work through them via the forum. Anyhow, the gist of the build is a Rotax water cooled barrel, using a 64mm stroke Lambretta crank mated to a 125mm rod. Bottom end Lambretta, top end Rotax. Here's the barrel:
![Image](https://farm5.staticflickr.com/4430/36922828635_6d403bb467_m.jpg)
This one's fun. A comparison to a stock 200 barrel.
![Image](https://farm5.staticflickr.com/4442/36922828255_31788af7be_m.jpg)
And the obligatory 'gasket on the crank case' shot...
![Image](https://farm5.staticflickr.com/4406/36922827885_c96b6cb110_m.jpg)