4+1 front would be fine, i have stock on mine, but the 9x9's would be fine also, it won't be enough for you to notice. but i cut my rear spacers in half to give the bike a wider rear for better handling. this is a tip rocket ron gave me. you guys should give him a call and pick his brain.
4/156 front (same as Yamaha YFZ 450)looking to get a ktm what bolt pattern are they??
thanks
kyle