Iridium spark plug in the Spree

[Scooterspal]

I ordered an NGK Iridium IX spark plug for my 1985 Spree. I have one in my other scooter and it has worked out well. Much faster starts, smoother running all around. It's worth the $7.00, I feel.

Has anyone else done the same?

[Keoni]

I have personally never tried the Iridium plugs but I have tried silver and gold plugs and i can tell you this...they are not worth the money for something you will change every few months. The Iridium plugs cost more then the Gold plugs so I'd perosnally stay stay away but thats just my 2 cents.

[CharlotteSpreeRider]

I'd say, if you really think they make a big difference, do a blind "taste test". Get 2 or 3 different kinds of plugs, and have someone else put one of them in and not tell you which one they are putting in. Ride it around, maybe for a day or a week or whatever, then have them change to a different plug, again without telling you which plug is it. That will remove the possiblity of your thinking that the Iridium plug is better from being a subconcious tendency to believe the marketing hype that everything that is more expensive is better (Monster cables for example).

I'm not saying that any plug is any better or worse than any other, just suggesting that it should be tested blindly for the sake of science.

-aseigler

[Cubey]

I think I'd rather stick to the $1.72 (w/ tax) normal NGK plugs than pay $7 for one.

[mopedman]

i pay the $7.00 and get the good s*** for my bike. it ant like the extra 5 bucks is going to brake the bank

[Cubey]

i pay the $7.00 and get the good s*** for my bike. it ant like the extra 5 bucks is going to brake the bank

Oil is one thing (GN2 vs cheaper oil), but normal plugs aren't lacking in quality assuming you buy a name brand. It adds up quick if you buy a lot of extra overpriced stuff.

[CharlotteSpreeRider]

Oil is one thing (GN2 vs cheaper oil), but normal plugs aren't lacking in quality assuming you buy a name brand. It adds up quick if you buy a lot of extra overpriced stuff.

Nobody has proven yet (to my knowledge) that normal plugs aren't lacking in quality. We need to do a scientific study.

[Cubey]

Nobody has proven yet (to my knowledge) that normal plugs aren't lacking in quality. We need to do a scientific study.

Exactly.

[Kenny_McCormic]

Only way for a plug to perform better is a hotter plug, which will require more fuel to keep it form leaning out. Or at least thats what i have found to be true playing with various old motors.

[Scooterspal]

A couple of points on the Iridium plugs.

1) You will not be replacing them often. They do not wear out like normal plugs so in the long run paying $7.00 for one vs $2.00 every few months makes sense $ wise.

2) They do not work by burning hotter, they work by firing exactly the same every time and will less voltage. Their point is very narrow so the spark fires in the same place every time. This results in a more even burn.

The fact that they can fire with less voltage means quicker starts (less battery drain).

I installed mine this weekend.

[CharlotteSpreeRider]

Ah, but they're designed for feul-injected 4 stroke motors, not carbed 2-stokes.

1. That would make sense, except that these bikes don't wear out plugs normally, they foul them all to * first.

2. The ignition is not supplied by the battery on these bikes, ever. The battery ONLY spins the starter motor and powers the turn signal and brake/tail light. The magneto/coil produces the power to spark the plug.

I still say that a scientific comparison is required to determine whether they are actually worth it or not. Using the manufacturer's propaganda doesn't work for me.

-aseigler

[Scooterspal]

What can I tell you. My scooter starts faster and runs smoother and with better pickup.

I don't own stock in NGK. Do what you want.

[mopedman]

i am still sticking with the good plugs