My son has been trying to jet his Kawasaki KDX220. I tried to advise him but you know kids. I praise his willingness to hang in there with it. We all know we can get it close one minute then it goes crazy. Since I have hearing loss and it's hard for me to hear the rpm on the huskies I purchased a hand held single cylinder tach. He came over confused but I got him involved and we set the balance/pilot jet close we need smaller jets. But it's 2 turns out on the balance screw, close. She runs great. I could hear the rpm on the kawie. Seeing the rpm change is awesome. I think santa may bring him a tach. http://www.ebay.com/itm/Strandix-WI...4-Cycle-Engines-0-TO-15-000-RPM-/112257893827
