I have them in me car, but they have a recomended life of 60000 mile and are standard fitment in it.
I had some cold splitfire plugs in me FZR when i got it and it was a right bitch, would flood all the time and foul up very moment you wasnt wide open. The best thing i ever did was put it back to standard. I would maybe use them in a race bike but deffo not on a road bike.
But if there in it already i would leave them in if it runs well enough.
Cheers
Ian

reverse cylinder jim wrote:I never use them either.
I do prefer Nippon Denso plugs to ngk's in my nc though

Interesting, why do you prefer NDs over NGK???
I'm sure I get better mpg from NDs over NGKs in the Transalp.....

I did try Iridiums once & saw no advantage in any way, shape or form.

Phil

Cammo wrote:

lizard821000 wrote:on a similar note, why is it that the tiny vfr plugs are so fking dear!?

Because they are 8mm (tiny!) and there are only 3 models of bikes that use them.

New tooling to manufacture them plus less volume equals higher cost!

If you think the ER9/10's are dear then try the ngk 8mm race plugs.

Sorry for getting off topic...

I was hoping for a reply from somebody who'd used them.. to see if they had good or bad results.. with the ZXR I found it actually ran better on the standard plugs!

Next time I change the plugs i'll just get standard.

But to go off topic.

Cammo... the NGK raceplugs (The ones without electrodes) I can get a set about the same price as the normal plugs are they suitable for a road bike?

I have denso ones in my bike plus 8 spare ones (new)
So I think I'm gonna b sticking to my denso ones for a while lol
I have never used STD plugs in my nc35 and my bike runs fine

phil x wrote:

reverse cylinder jim wrote:I never use them either.
I do prefer Nippon Denso plugs to ngk's in my nc though

Interesting, why do you prefer NDs over NGK???
I'm sure I get better mpg from NDs over NGKs in the Transalp.....

I did try Iridiums once & saw no advantage in any way, shape or form.

Phil

Since using ND's ive never had any running problems with my bike (fouled plug etc) like ive had when running NGK's. Plus i swear it feels more alive with ND's fitted!

i used them in my 2 poker and once fouled they wont fire.... there shit imo lol

used them in my old 99 rrx blade and i could not tell the diference have them in a cb13 only reason was the claimed longer service life as they claim the tips don;t erode away like a conventional plug , have had no issues with them so far. wether they are worth the extra cost over normal plugs the jurys still out : only really bought them for the blade at the time for the claimed extended service life as getting plugs in and out an old blade is a bstd job vfrs are a doddle by comparisin.

Neosophist wrote:Cammo... the NGK raceplugs (The ones without electrodes) I can get a set about the same price as the normal plugs are they suitable for a road bike?

I haven't had any issues with them in my racebike, but I was told (by a reputable bike mechanic) that they were more suited to engines with higher compression than standard and can foul more easily in a standard engine.

I think they only come in 10 and 11 heat range so not really suited to my roadie.