At the heart of Arctic Cat’s new BLAST models for 2021 is the industry’s first electronic fuel-injected, single-cylinder, 2-stroke engine – the 65+ HP-class C-TEC2 4000.
With an industry-first design that’s compact and lightweight (under 50 pounds), this 400-class (397cc) two-stroke single-cylinder engine with electronic fuel injection and 3-stage exhaust port modifier (power valve) system delivers impressive throttle response and surprising engine performance. Rated at 65+ HP-class performance, it is well less than half the power of the 800cc twin (rated at 165 HP-class performance). A counter-balance shaft eliminates most engine vibration.
This new engine is basically half of the C-TEC2 8000 engine, sharing much of the engineering and design along with many of the components. For example, the piston and cylinder are the exact same parts as found on the 800, as are many other components which all help to reduce the overall development and production costs.
In our initial testing of the three models fitted with this engine, the performance actually exceeded our expectations. Each sled is truly fun to ride, as the clutching and gearing calibrations make use of the power and get it to the ground most efficiently. The bottom end and mid range was where the power was generous and fun to use, where on the top end it flattens out. That said, the top speed capability of the ZR 4000 was still amazing, it just takes a while to get there.
Links to all five feature articles on the 2021 Arctic Cat Blast:
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