The 420 now utilises the same frame as the 500cc models. The frame is 20 percent stiffer than before. Meaning your ATV can really handle the tough stuff. The TRX420FM is one of Honda’s most loved and biggest selling ATVs and now it’s even better. It’s your do-everything benchmark seller with a fuel-injected 420cc, OHV liquid-cooled engine and a strong 5-speed manual transmission. This ATV has all the features to make easy work of hilly terrain.