I got a 98 arctic cat 300 4x4 i have replaced the CDI, coil, spark plug and the voltage regulator. When i bought the quad it felt like the quad has an electronic speed limit. It doesn’t rev past like 1/4 throttle even when you give it full throttle. It has no power to get out of its own way and i am lost on what to do. Anyone please help

 

A clogged or damaged exhaust system can restrict the flow of exhaust gases, affecting engine performance. Inspect the exhaust system for any signs of blockage or leaks.

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OP, did you figure out the problem? I have the same quad and the same sluggish issue.