Quote Originally Posted by axa View Post
engine blown yet again... this time a cylinder bolt was burned through because I was never able to find the exact cylinder for this engine.
Oddly enough i didn't actually lose that much compression.

Anyway before i have to fab one, anyone ever seen these for sale?

Boy the 167fmm proves to be a nice "reliable" engine until you actually have problems and cant get "reliable" parts in the states...

-failed valve
-failed piston/rings
-failed/incorrect cylinder

I have to nip this crap at the bud... ive found a Yamaha xv250 with less than 3k miles for $400, and have been speaking to a guy in japan who did the swap.
I hope to get that done over the winter... but for now... cylinder stud anyone?
You would do well to put your expertise into the Yamaha. NO problem on parts and close to 80mpg. That model has been around over 20 years.
The main problems are a dirty carb from sitting with today's gasoline and corroded connectors . Sometimes the intake manifold rots from old age.