HMF Exhaust For Raptor 660 is available as a Slip On or Full System in the HMF Performance series. The Slip-On system picks up 10-15% more horsepower throughout the power curve while the full system picks up 20% more horsepower throughout the power curve. If you find HMF Exhaust For Raptor 660 contact us!
The Bottom line, if your simply looking for the best Exhaust for the Yamaha Raptor 660 look no further than HMF. They offer the strongest materials and most durable finishes on all products built. Not only does HMF offer durable long lasting products, but they stand behind the product taking care of the customer in the event their is a problem. Worldwide Performance Parts have been offering our customers HMF products since 2003 with almost zero issues.
All HMF exhaust jetting has been predetermined with proper jetting specs to ensure the ultimate performance from your HMF product and should be used as a reference only. The proper jetting will ensure the full performance potential from your HMF aftermarket high performance pipe and is necessary on all machines.
Model Specific Information
Recommended Tuning – Stock Air Box
Left Carb: 145-150 Mikuni Small
Right Carb: 150-155 Mikuni Small
Needles on 3rd position
Recommended Tuning – Modified Air Box
Left Carb: 150-155 Mikuni Small
Right Carb: 150-155 Mikuni Small
Needles on 3rd position
HMF Basic Jet Kit Includes
140, 145, 150, 155, 160 Mikuni Small
