I'am brand loyal and would be doing a 250r to crf450 conv. One question i have is the tranny in the crf. Aren't the gears in the crf a tad bit narrow when compared to the trx450? So putting them in a quad for extented time will eventually fail? Would it be better to buy a hybrid frame from someone like walsh, lonestar, or using a stock frame pretty easy to setup.(Don't race) What are the other cost you guys with 250rs running into? Like you can't use a trx radiator, expensive exhaust, air box, possibly rear suspension setup? thanks for any info I don't have my heart set on building one just kicking the idea around.