Interesting Realities in the 4-Stroke Wars

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Did you know Yamaha has a worldwide patent on the location of a snowmobile 4-stroke exhaust system? True.

As it turns out, the company’s move to secure a patent on underseat 4-stroke exhaust routing has been a distinct advantage for Yamaha engineers. Why? 4-stroke exhaust systems produce a lot of heat.

This heat is difficult to manage in the confines of a typical snowmobile engine bay. While 2-stroke exhaust pipes can be located in the front and right side of the belly pan with little problem, 4-stroke pipes and silencers require tons of shielding and insulation to contain heat and keep it away from temperature sensitive areas.

Yamaha’s system not only eliminates the under-hood heat issue entirely but adds a cooling component by exposing pipes to snow in the tunnel. Cool, literally.

Supertrax Online
Supertrax Onlinehttps://www.supertraxmag.com
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