I race bikes in 125C and Sportsman in D16, but I raced quads once last year for the first time ever. I have a 400EX but rode my friend's 450R (a-arms, axle, bars, pipe) at Sugar Camp and took 5th, which I was happy with. I honestly think that if you aren't afraid to jump and can corner half way decent, B class is perfect with lots of competition and is a blast. I'm thinking about racing my 400 a few times this year for something new, but we'll see.
I'm from Medford, and have a few friends who race the GLQS. Jordan Richert, Brad Rodman, Wade Matyka, and Matt Noland. Know any of 'em? J/W also if you know Luke Konnick (sp?), he's from Stanley and I ride w/ him too.
04 YZ250F-GYTR upper clamps, pro-tapers, Yamaha of Troy graphics
00 400EX-White Bros. Slip-on, K & N filter, Maier Handguards, DG Nerfs, Renthal Bars, Houser +2 A-arms w/ 450R shocks, DG front bumper
96 Suzuki RM125-Pro Circuit exhaust, Uni-Filter, Renthal bars