I have a 06 wr450 that seriously has no top end power, I have done all the derestriction stuff and just installed a jd jet kit thinking that might be the problem but it didn't really do much besides get rid of some top end surging I was experiencing. Basically in order to wheelie this thing in third I have to yank the hell out of the bars while clutching it. This wouldn't be so bad if I wasn't running 14-50 gearing. This thing should be a wheelie machine with that gearing. I've ridden a buddies 04 wr450 and it rips I can pull that up in 3rd no problem power or clutch. What gives? Why does my bike suck ass?