Spark Plugs question

[99yam40]

I don't know I ran into some shaved ones even back then

[TownsendsFJR1300]

I can say from experience, (as I used them in my 2007 Yamaha FZ6 motorcycle, 600cc, 95HP), iridium's DO NOT LAST longer than the stock plugs.

In fact, the gap opened (wore) quicker, (past spec's) than the stock, "dual ground" plugs (both styles are/were NGKs).

No noticeable difference at all.

Once these Iridiums wear out, stock NGKs are going back in.

IMO, stick with the OEM plugs.

[pstephens46]

I don't know I ran into some shaved ones even back then

They were quite a novelty back then. They even had their own magazines.

[99yam40]

They were quite a novelty back then. They even had their own magazines.

Don't know about the magazines, but I did know a few exotic dancers.

sure wish I knew where some of those pictures went to

[gtreanto]

FWIW I change my car plugs every 40K. I find its just about the right mileage/time so they don't get frozen in the aluminum heads. With overhead cam engines the plugs are up above so its an easy job. Even if you go with Iridium plugs a V6 is less than $50.00 from flea bay. Trucks using push rod engines are still a PITA. If they have cast iron heads then I'd push it longer. I was curious if outboards were different but reading the thread it doesn't look like it.

I like the small spark area of Iridiums compared to platinums. The only issue I've read with Iridiums is the tip can break and cause issues. I've never seen it in the 15 years I've been using them.

[TownsendsFJR1300]

The only issue I've read with Iridiums is the tip can break and cause issues. I've never seen it in the 15 years I've been using them.

The tips are easily damaged if gapping incorrectly...

[gtreanto]

I have never had to gap Iridiums. The factory gaps are set for the vehicle I'm putting them in. At least that has been my experience.

[boscoe99]

Biscoe is straying off course again......

Hairy beaver back in those days for sure

Hey, you must have known Rita. Described her to a T.

[pstephens46]

Hey, you must have known Rita. Described her to a T.

Was her last name Coolidge?

[boscoe99]

Was her last name Coolidge?

Don't I wish.

[99yam40]

I have never had to gap Iridiums. The factory gaps are set for the vehicle I'm putting them in. At least that has been my experience.

always good idea to check the gaps on all plugs to make sure before installing.
they could be bumped and changed somewhere down the line

[TownsendsFJR1300]

always good idea to check the gaps on all plugs to make sure before installing.
they could be bumped and changed somewhere down the line

Plus 1 ^^^...

Just use a WIRE GAUGE and if adjustment is necessary, use the proper tool to adjust the ground, DO NOT lean on the electrode..

[gtreanto]

I do check but have never had to adjust..