HMF Mini Series Exhaust Yamaha
2009-2013 YFM90R Raptor
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.