converting 125/150 blocks to 200

[soosh]

Why not do a 185 conversion and a good road tune on it.

[camel]

of course there are many possibilities for small block tuning...they have also been covered...think most of us on here want big cc,s.....so just to finish this thread with a question...why are only certain small blocks only suitable for a 200 conversion?

[carlos fandango]

so just to finish this thread with a question...why are only certain small blocks only suitable for a 200 conversion?

Some spanish cases, the later ones and definitely the ones with the neutral light (mines a 125) and the later indian 150 cases.
They are basically 200 casings but with spigot hole and 150 stud spacings it a bit difficult to describe but when you see one you will see what i mean.

http://www.scooterrestorations.com/lamb ... ck-bushes/
Normal italian 150 casings would require a lot of welding
Russell