The VM26 is an excellent choice. The others are correct in stating that a 30mm & 32mm are too big. My 150 has a 30mm but it also is a 207cc with a wild cam. I,m sure I'm even overkill with a 30mm since I instruct and also experienced on a 250cc with big bore kit and large grind Harley House cam in a ported and polished head, the stock carb performs better then either 30mm or 32mm carbs will. too big of carburation will hurt performance. I know of several running the VM26-606 on their modded engines and they perform great.
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