How to Adjust the Idle on a Yamaha Blaster

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The Yamaha Blaster is an all-terrain, high-performance vehicle that was produced from 1988 to 2006. It features an air-cooled 195cc two-stroke engine, six-speed manual transmission and rearward kick-start. This model was designed to be very lightweight and fast, which makes it ideal for racing or performing other high speed maneuvers. While operating in harsh conditions, it may become necessary to adjust the idle speed of the engine to ensure smooth performance. As a result, the engine will perform better and will reduce wear on other critical parts.

Things You'll Need

  • Flat head screwdriver
  • Set the parking brake on the ATV and start the engine. Let it warm up completely to the point where the engine will idle on its own with no assistance from the throttle.

  • Locate the mixture control screw while the engine is still idling. This small brass screw is located on the left side of the carburetor right beside the choke lever.

  • Turn the screw using the flat head screwdriver. When the screw is turned to the right the engine rpm will increase. When turned to the left, the rpm will decrease and eventually restrict all fuel from entering the engine.

Tips & Warnings

  • Setting the engine rpm higher than the factory recommended setting can be dangerous to the ATV as well as the operator.

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  • Photo Credit Quinn Rooney/Getty Images Sport/Getty Images
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