ive seen a few can ams break up control arms and one guy i ride with lost his motor on his 800 with 600km. reliability is not a problem with the brute if you treat it good it will be good to you and for the big bores amr and fundy are very reliable the brute motor is bullet proof as long as u dont swamp it. its a hit or miss for any motor when it goes under. my brute has 2800 km all with 30 inch mudlites and 29.5 outlaws and have had no problems