All I can tell you is that Polaris uses engines built by Fuji (Subaru.)
From what I recall from working on snowmobiles (over 10 years ago)
Fuji engines are well made.

Tony

Big Job wrote:
Help Group
Here's what I have.

1980? Polaris 340 (336cc) air cooled two stroke engine.
Twin Mucuni carbs.
Model # EC34PT-07
Motor # 905544

Doe's anyone know the hp of this engine?
with single carbs and with duel carbs.

Your help would be greatly appreciated.
Thanks Joe