Sticker shock

[1976RD400C]

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 

[m in sc]

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

[1976RD400C]

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.

[1976RD400C]

25 miles later. 25:1 oil in the premix.

[m in sc]

id run 32:1. thats too oily imho.

should be way cleaner than that

[2steve]

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.

[JKV45]

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.