Interesting conversion, 4stroke pitbike style engine to 2stroke same bottom end

[zwebx]

http://www.yamahat135.com/threads/exciter-135-4-stroke-to-2-stroke-engine-conversion.13979/
its pretty damn cool, someone do this to a mini

 

[my67xr]

wow, and i thought i had too much spare time....

check out where the cylinder studs screw into the block, the barrel would need tapping on with a mallet.
i could picture the first start up/warm up, the water would be peeing out of the head everywhere too ?

 

[zwebx]

there is a video on it, how cool would it be though and why did not he use a watercooled barrel and seal up both ends and cut 2 ports into it ?