Quote:
Originally Posted by Fast_Freddy
From the Templar 250 Resource Guide:
"Spark plug: Torch D8TC (oem), NGK D8EA (copper), NGK DPREIX-9 (iridium) GAP: 0.6-0.8mm (.024-.031")"
Question for those running the iridium plug, did you re-gap the plug? 9mm is a pretty big gap for a little motorcycle coil.
I list the longer iridium plug because it's already been tested and found not to cause interference issues despite extending further into the combustion chamber than OEM but I do wonder who was the first brave/ignorant soul to install one and did they hand crank the engine first or just start it up?
Personally I went with the NGK D8EA direct replacement for the OEM Torch. So far so good but if I have any issues I may try the iridium. Back in the day I used to run palladium fine-wire electrode plugs in my 2-stroke moto-x bikes because they didn't foul like copper plugs did. |
I've been running the same DPR8EIX-9 ngk plug since 2018. I never once touched the gap. I am still using it even after swapping heads. Engine has no misfires or power issues. Keep in mind this is a bike with a cam, ported head, and a decked jug with a .8mm squish gap and a flat top piston (reads, much higher than stock compression). No spark blowout issues.
The advantage of Iridium is it's durability. It will probably outlast the rest of the bike. The other advantage is that the tip being so small on the Iridium plug means the spark has a smaller area from which to jump from, giving it a more concentrated and consistent arc that can jump a wider gap, which is why it works. I would not run a .9mm gap on a copper core plug personally, and likelydrop down to a .6-.7mm gap.