Irridium plugs.. opinions

[zore]

I just ordered 3 and wanted some opinions? Anyone?

[Pilsbury]

I had them in my old VFR and they were the dogs wotsits and certainly with the K&N filter it improved performance and fuel consumption

[Ron_F_D]

I put on a set on my old SV650. I can't say for power and milage however they did make for easier starting especially when cold. According to documentation they are also less prone to fouling and last longer.

[Diego]

> I can't say for power and milage however they did make for easier starting especially when cold. According to documentation they are also less prone to fouling and last longer.

That's pretty much their real advantage, IMO.

Anyone who sees a power difference after the change had to be running plugs that were already deteriorated. <u>If</u> Plug A and Plug B both start the combustion process consistently at the moment of sparking, there physically cannot be much difference in the outcome. The geometry of the plug tip is simply not that big a factor in the performance of the combustion chamber as a whole.

But if Plug B begins to foul easier or develops internal leakage currents or is susceptible to other problems, then Plug A is clearly the better one to be running...not because it can give you more performance than Plug B did initially, but because it will still give you that performance long after Plug B can't.

[DragonDan]

Sounds interesting, where did you order/ pick them up from Zore?

My bike always spins about 7 times before it starts up. Even after new plugs. Maybe sparkers like these would make it snap sooner. Not a big deal, I know, but worth a shot.

DD

[Stlakid]

I put them in for a few reasons.

1. They are supposed to require less voltage because of the small diameter electrode. (my thinking was that less load on the coils might keep me from ever needing to replace one, knowing Triumph prices...probably a stupid reason I know)

2. They are supposed to start better. I haven't noticed that on mine.

3. They were only a dollar more than the 'Standard' dual ground plugs Triumph installed which if there is any truth to spark shrouding these would be the worst plug to have.

I opened the gaps on mine just a bit to .030 I have not noticed any real difference from stock, but they were basically the same price and I don't have to worry about changing them for quite a while. They are a bit of a pain to get at if thats all you're going to do.

A word of warning a lot of the plug charts I looked at on line were WRONG on the model of plug my bike came with! My bike has the VERY small 10mm version and many of the plug charts listed it as the older 12mm plugs.

[ST]

I fitted them in my honda VTR 1000 and found cold start was better ( carbs and a choke lever !! no fuel injection).
They were marginally more expensive but i didnt notice any miraculous improvements on performance.