i have a wr450f 2003 / left over got a good deal. so far i opened up the exhaust and air box , dont think i will do the grey wire thing . but on the throttle stop i saw in here to buy one for a yz 450 . the only difference i can tell is the length , has anyone just ground one down and if so how short do i make it ? also it is a bear to start cold i do keep a 1amp charger on the battery at times to keep it fully charged seems to help but has anyone got a trick to start it cold ?