The plug I use/sell in my builds is the NGK LKAR8A-9. KTM p/n 78039093000. It's a KTM specific plug. We have for sale on our site. IMO better quality plug than the Bosch.
KTM Store :: KTM Street Powerparts :: RC390 :: Engine Performance :: KTM PERFORMANCE SPARK PLUG LKAR8A-9
Hello everyone. I'm looking for higer performance spark plug. Could anyone give me advice? Thanks.
Has anyone tried Bosch ZR5TPP33S? Can it fit on RC390? Personally, I prefer to use Bosch Spark Plug though it's hard to get in Taiwan.
Hope someone could give me advice, thx.
Have you tried Brisk, its a silver tip electrode. MR12YS is the part no.
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Ok time for me to give my two cents. I shall give it for free.
I have tried the following Plugs in my Rc 390: Bosch VR5NE, Pulstar GG1H, NGK 1406. Out of these three the Bosch is ok, the Pulstar quit 4 months in, and the NGK is new.
I picked the 1406 because it was a grade hotter that the Bosch. As the Bosch and the Pulstar were not getting hot enough to preform self cleaning but hot enough not to foul.
I also picked Iridium for its longevity and disregarded its impedance, as all of the plugs have a resister built in to the plug. So i don't believe that one plug has less resistance than the next.
The last reason i picked this plug is because of the small point that the spark jumps from and the small point the spark jumps to. Forcing it to have a more consistent spark.
Other plugs i looked into are: NGK 93026, NGK LKAR8A-9, and Brisk Silver Racing MR12S. All good candidates. Hope this helps.