Making sound waves work for you. Dear ATVC: I keep noticing these odd canisters on modern aftermarket 4-storke pipes. What are these? Expansion chambers? Close! The expansion chamber was a staple of the 2-stroke exhaust system; a place to store the hot gases escaping the engine in every stroke so as to control the amount […] More »

Damage control. Dear ATVC: My 5-year old daughter was giving my Foreman “a shower” without my permission and then later confessed that she sprayed water into the muffler. She was unable to tell me how much exactly but the machine has since been started and is running fine. Do I need fear long term affects? […] More »

Why is there gas going into my pipe? Dear ATVC: After just rebuilding the top end of my 87 Suzuki LT250R, I put it all back together and now when I kick it a few times the exhaust fills up with fuel. I’ve checked over the whole carb and it’s working fine. I’m unsure of […] More »

How can I get my ATV to sing? Dear ATVC: I have an 04 Kawasaki KFX400 and with the gutted stock exhaust and it sounds horrible. I am considering an HMF system but don’t know whether to buy the Performance or Competition slip on. I want something really loud, something that has a deep sound […] More »

Dear ATVC: I have a Honda 400EX that I just ride in the dunes. Want to do a slip on exhaust and decided I want an HMF but am not sure if the Performance series or the Competition series is right one for my quad. Just want a little wake up, I don’t race or […] More »

Dear ATVC: I bought an 86 Honda ATC250sx but the exhaust is broken. Apparently it’s not possible to order a new one. Do any aftermarket companies make one for the 250SX? I would like to know if it’s the same exhaust as for a Honda 250es (Big Red). Searched eBay and found nothing. Help! marcuslachance […] More »

Dear ATVC: So I have a 06 Kawasaki KFX400 and I was thinking of buying a Megabomb header from FMF. I tried searching for if mating the two would be possible but nothing came up. I wanted to see if I could put a Megabomb header on my wheeler with my RS-2 slip on. HunnerBunnerGo […] More »