On my 08 DS450 with an FMF Tuner HMF slip on, what spark plug should I be using?
rickwhoo · Registered Joined Jan 24, 2021 · 11 Posts Discussion Starter · #1 · Mar 23, 2022 View full thread On my 08 DS450 with an FMF Tuner HMF slip on, what spark plug should I be using?