Has anyone figured out what the closest E3 Diamond fire spark plugs are yet? I would like to try them in the bike, but I didn't know if someone else has already figured out which plug to use. I bought a couple of stock HD plugs to take down to the local parts store to see if they could figure it out, just haven't gotten down there yet.

 

Don't know about bikes but i tried them In my Camaro in 2005 and e3 ended up buying them back from me after I replaced 6/8 of them. Couldn't keep them from fouling. Put some stock Delcos in it and ran perfect. I won't spend money on them.

 

what he said....stick with stock or similar...fancy plugs don't make any difference except to your wallet..

 

The correct E3 for your Sporty is an E3.36
But as the others have said, don't waste your money.

 

Well in my experience they have helped increase MPG in every vehicle I've installed them on. And I'm the **** type that records information on gas, mileage, and such. Usually I see about a 5% gain, but it depends on the vehicle. Before the E3 I used the Bosch Platinum +4's.

 

Run whatever makes you happy.

I ran a set of E3's for 8,000 miles a couple of years ago. They worked, but no better than a set of plain old Champion RA8HC's at $1.50 each.

 

There are no magic spark plugs, even a new plain Jane Champion will increase MPG a certain amount.

 

Agreed to what CHarley and 1200Cdriver have said. The fancy metals only reduce wear, which means you don't have to change them as often.

 

My favorite thing to do as an auto technician was to fix cars with a miss fire. Customer complaint of a miss fire even after they replaced the plugs, we'd make bets on what plugs were in the vehicle... 9/10 bosche plugs. Really horrid designs.

Just an FYI you aren't going to gain much by putting in special quad tip plugs because the physics of electricity will be the same inside that churning inferno of a motor.

the same spark voltage and amperage = same burn.

Look at it this way, the only things that can affect gas mileage would be your foot/hand, tuning, and the enviroment you are driving