If your looking for a spark arrestor for your new YAMAHA YZF 250/400/426, Bills Motorcycles Plus (BMP) has a kit for you which uses the stock muffler. All you do is drill out the rivets for the stock end cap (this can be done with the pipe still on the bike), remove the end cap, slide the BMP kit in, then install the eight supplied Allen-head screws. Simple. We include a deflector to keep the rear fender from melting. We let you choose from our silver end cap or FMF megamax end cap.

 The kit retails for $129.95, about half price of any other
spark arrester on the market. NO jetting changes needed (you may want to adjust mix screw just a bit). The kit also quiets down the noise a lot without loosing power, most MX riders leave it in all the time. Dealer inquires welcome.