Hi I have a 2001 kx 500 im running a pro circuit plat 2 pipe with a 304 silencer, v force reeds and a k and n air filter, im running a 170 58 air screw 1.75 turns out needle postion 3rd. This setup is wat it ses on the pro circuit website.... but its just not idling right wen it sounds like it idleing okayish, il pull back the throttle and the revs will stay up to long and it will idle to high once again, there are no leaks cracks or leaks. Ive also got a 180, 175, 165 50, 62. any help will be most apreticated. Thanks luke