Though I'd replace my 2 year old plugs in my hot rod because it has a slight misfire at full load high RPM. Advance Auto. Total with tax $64.76 :eek:
i pay about 11 bucks each at the dealer . they aint cheao but if the bikes tuned well they will last many years.
if you have a high rpm miss,,gap the plugs a bit smaller see if it cures it. my 0.02
All good with the new plugs. Runs great, 9500 rpm. They were gapped at .028" and that's how I installed them. How about getting a spark plug sand blast cleaner to clean the old plugs to like new? Weather finally got nice in the NE.
25 miles later. 25:1 oil in the premix.
id run 32:1. thats too oily imho.
should be way cleaner than that
I just went to order more BR9EIX plugs and saw them offered at NGK.com.
Ordered (4) and it was a total of $47.40 with the added shipping. Tax didn't show.
Know that counterfeit plugs, especially NGKs, are everywhere on eBay and Amazon.
They are getting almost impossible to spot visually, but are not correct when tested for resistance.
Buying from a reputable shop, factory store, or dealer is usually the safest - but of course more expensive than the online counterfeits.
The NGK.com plugs came in.
The 4 pc box lid has a serial number debossed on the inside and the box color printing is sharp. "Japan" stamped deep on the metal body and no tool marks on the curved "squeeze" area.
Iridium electrodes are spot on. They are genuine BR9EIX 3981 :thumbs:
Torque test channel did some tests on numerous real and fake plugs. Was pretty interesting. Some of the knockoff ones are just as good. Some aren't worth the box they ship in.