Discussion Starter · #1 ·
I currently and still using the Honda recomonded NGK plug. Running a HMF Optimizer and Exhaust I would assume a hotter plug would be better. I have seen a Indium Plug from NGK. Any one know the part number for the Indium plug in a 2007 Rancher 420. The E3 is a 3.36 but cant find one anywhere?