my 400ex is piped, ported, high compression piston, new cam, new valves. It also has works triple rate shocks with rezzies and +2 lone star a arms. It has almost $3000 in upgrades. I want to know if I should sell it and buy a 450. Or put like a sparks 465 kit in it since i have alot of money into it? Also will the 450's soon go down in price?

 

the 416 i built with a cam, fcr, pipe, and porting was faster then a stock 450r with a pipe on the mx track.