I ran a like 42 or soemthing a long time ago and it was a beast, then it messed up and i got a 38mm and they are just as good.
2002 Honda 440ex
Mods: 06 plastic, Noleen HVO exhaust, 440 big bore kit, Hotcams Stage 2, JE 13:1 High Preformance Piston, New valves and Springs, Freshly Rebuilt Carb, +1 A-arms, Stock axle with +4" spacers, aluminum air box, custom air box lid, Razr's on front, Kenda in back, Pro Armor Nerfs, Fly handle Bars, Oura Grips, New Black honda seat, Fresh Black Powder Coating all around, Air Scoops, K&N Filter with Sleeve, Aftermarket metal Thumb Throttle, and alot more but cant think of it.
2008 Yamaha Grizzly 660
Mods: 27in ITP Mudlites, 1000 pound warn winch, and um.. well stock pretty much...