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 »

A brand new 2-Stroke quad? Yup! The last production 2-stroke was the Yamaha Banshee, which ceased production in 2006. However, resourceful ATV enthusiasts still have the option to run a brand new performance tuned 2-stroke thanks to a company called Panthera Motor Sports out of Quebec. Calling it the PM07-18, this 550cc monster puts out […] More »

Does not need premix. Dear ATVC: I have a 2007 or 2008 Polaris Sportsman 90 that I thought was a 2-stroke. I filled a gallon gas can with fuel and mixed it with 2-stroke oil 50:1 ratio. Now it has no power once the throttle is opened too far and can’t climb any sort of […] More »

Going to be a tight fit. Dear ATVC: I want to convert a 1250 Suzuki Bandit into 4-wheeler. What would be the best frame to mount my 2007 1250 Bandit engine into? jeremyb93 Well for starters, no matter what ATV frame you decide to go with, plan on EXTENSIVE modifications to be in order for […] More »

From the air cooled 2-stroke era. According to the calendar, spring has sprung. The days are getting longer and your ATV Connection editors are, as always, scouring SprocketList in the hopes of passing along a good deal on a machine to make those epic early season rides a reality. That said, this week’s ad takes […] More »

Will the glory days return? Dear ATVC: My friend says Honda is manufacturing an all new fuel-injected, environmentally friendly 2-stroke engine for racing. Does this mean we expect a return of the 250R? Your friend speaks the truth- Honda did indeed file for a patent for a unique (modern) 2-stroke engine design back in 2015 […] 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 »