Spark Plug Recommendation
I pulled the spark plug from a '88 TRX350D today and to my surprise it had an NGK D6EA plug in it, which isn't one of the ones listed in the service manual for the bike. It is carboned up pretty good. Which plug do you guys recommend for it? I see there are 3 NGKs (DR8ES-L, DR8ES, & DR7ES) listed as compatible in the manual. I'm thinking the fouling might get worse if I use the colder plugs.
I have a compression gauge, so I may as well check it before I put the new plug in. Any special procedures for doing that on these bikes, like hold the throttle down or etc?
Last edited by KoolBreeze; 04-26-2019 at 09:57 AM.