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Yamaha® Raptor 90

The Yamaha Raptor 90 is available as a Full System in the Performance, Mini-Exhaust Series.  It features a 9", 1.75" DIA exhaust shell with a mini-end cap design and a Header that's .25" larger in diameter than the stock system.  Switching to the Performance, Mini-Exhaust Series will drop weight off the machine and add 10-15% more horse power to the 90cc engine.

Fits: (16-23) Yamaha Raptor 90

Fuel tuning is not typically required learn more

Typically, fuel tuning is not required when installing an HMF Exhaust on this machine. However, other modifications to the machine may require the need for fuel tuning to ensure the machine runs properly, and there is no damage to the exhaust system. See the tuning settings below for possible tuning solutions or Contact Us for more information.

Exhaust Systems

Tuning

Carburetor tuning may be required for this model, however during testing the air fuel ratio was within specification.  Therefore we do not offer any carburetor jets for this model.

Low Speed Fuel

Going down on the number scale will reduce low speed fuel. Going up on the number scale will increase low speed fuel.

Mid Range Fuel

Going down on the number scale will reduce mid range fuel. Going up on the number scale will increase mid range fuel.

High End Fuel

Going down on the number scale will reduce high end fuel. Going up on the number scale will increase high end fuel.

Green Lower Switch Point

Going down on the number scale will turn green mode on earlier. Going up on the number scale will turn green mode on later. These modes typically will not need adjusted from their base setting.

Yellow Lower Switch Point

Going down on the number scale will turn yellow mode on earlier. Going up on the number scale will turn yellow mode on later. These modes typically will not need adjusted from their base setting.

Red Lower Switch Point

Going down on the number scale will turn red mode on earlier. Going up on the number scale will turn red mode on later. These modes typically will not need adjusted from their base setting.

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