If you're riding mx the stock suspension is definately un-safe... If all you ride is mx... and by mx I mean nothing but actual tracks... I would look into another option (ltr, yfz, trx)... It'll cost you a good 2g's to get a 'shee (or anything for that matter) close to mx spec..... Even with a perfect setup 'shee... it's no match for a 450 with the right setup... Which is what your competition will be... I don't even think I could ride a stock 'shee... I'd prolly kill myself...
Mike