E3 Spark Plug E3.34 Powersports Spark Plug, Pack of 1

Every engine I have put the E3 plugs in has come alive like never before wont use anything else I would highly recommend E3 plugs

These have become my plug of choice in my 1972 Norton Commando. The primary reason I like them is that the Commando is kickstart only (no electric start), and my bike has been retrofitted with a Mikuni carburetor, which doesn't have a conventional choke. So cold starting is quite a big deal. With other plugs, it has taken multiple kicks to get the engine to roll over. With these, if the engine is stone cold and the carburetor is set in "fuel enrichment" mode (the rough equivalent of choking a conventional carburetor), unless the engine has sat long enough to wet sump, it'll start on the second kick every time. (The first kick is required to get a charge down the intake runners, so it really doesn't count.) If the engine is warm, the tiniest little kick will send it over and running on one try. And if the engine has wet sumped, it make take a few additional kicks but the plug will run hot enough quickly enough not to oil foul. With a wet sumped condition in the crankcase, you'll get a puff or two of gray smoke as the extra oil burns off. But the plugs resist fouling quite nicely. And I can't say that about a lot of other plugs. I have yet to try cleaning, regapping, and reinstalling old plugs. But since I only have to supply two plugs (it's an old British twin, so it only has two cylinders), the cost of just putting in new ones is hardly prohibitive, even at the roughly $8 cost per plug. The nose and electrode lengths are also correct for the conventional plug to which they cross, at least in the case of my motorcycle. So there've been no problems with pistons colliding with plug electrodes. Clearance seems good for this application. In the attached photos, you can see this plug compared to the Autolite plugs that were in the bike when I bought it several years back. Note that I am running a Tri-Spark electronic (aftermarket) ignition system that's a bit more responsive than the stock point setup. I'm also running 7mm solid core plug wires without resistive suppression to get the hottest spark possible. (And I have a lot of series inductive and parallel capacitive bypass in the completely-rewired electrical system to keep noise to a minimum.) Overall, a somewhat pricier plug than most. But since I only replace two of them once a year, I can live with the added cost.

I used it on my 07 V-Rod went on a 3000km trip no issues

change these yearly for my Ariens snow thrower. we live in the West, 12-16ft of snow per year, temps below zero in January. these and strong and reliable, they fire up every time. they burn clean; one year I had to use an alternative that didn't last half the snow season and was churning out black smoke. top quality, I'll never use anything else in this 'thrower. can't recommend more highly!!

It’s burning like hell, it restored my engine power, adding that my car has 250k never changed spark plugs as it seems, even with double platinum ones. Don’t forget that they don’t solve a miss fire! Only if your engine burns oil… will be better than normal ones