I answered originallyOEM plugs if you look back.The OP is not riding a 2 stroke or a top fuel dragster, nor are the folk cruising down the highway. For all of us...including the OP, OEM plugs are what is best suited for his ride. I'm not sure why some folk insist on going waaaay out in left field with 2 stroke engines and extreme racing engines to try and find something that MAY need a spark plug swapped. I'd bet LLoyd uses OEM plugs in a big bore, supercharged Vic. He may or may not add MSD coil and wires. The OP asked a question and I believe I gave the correct answer. My answer is based on my experience which is quite a lot. I wouldn't rely on most forum members "verifying" much in regards to the topic. Honestly, it doesn't matter to me how many years they been doing it because unless they were doing it in a professional shop for quite some time, my experience has probably passed them by. I don't say that to be rude and I mean nobody here any disrespect. I chose mechanics as my profession and I've done it day in and day out. I've probably diagnosed more performance issues in one single year than most have in a lifetime. That kind of experience you just can't get in a back yard. I point to LLoyd and Rylan as examples, these two guys work on Vics day in and day out. While they are probably young enough to be the grandsons of many members on here, these guys have passed each of us by and they know more about these bikes than all of us, including myself, will ever know. Again, because they do it professionally, every single day. I'm not saying that I won't ever be wrong regarding engine performance and engine repair (which is my area of expertise) but it'll take somebody of some legit credentials to sway me.
I hope this doesn't get interpreted wrong as I don't intend on ruffling anybody's feathers. I don't want a forum argument. cheers
What oldman47 said about plug heat ranges is 100% correct.
I also know exactly what Im talking about.
No need for great long posts about how good I am.
I like to keep it simple.
Spark plug science is the same basics from lawn mower to Top Fuel and everywhere in between.
Forums are a hive of misinformation on spark plugs and the job they perform.