Bosch +4 Platinum Plugs

[ZLTFUL]

Anyone ever use these on their Monsters?

The Bosch stock number that crosses from NGK D8EA is Bosch 4477. Found them in stock at the local OReilly's and am picking up a pair after work.

I guess I will see if there is a difference...

[LA]

IMHO, a waste of money.

Having said that, I got Iridium's.

LA

[ZLTFUL]

2 things I m looking for out of them...

1. Longevity. Iridiums last forever...platinums not quite as long but still awful durable.
2. Multiple spark paths/less shrouded flame kernel. I have noticed a huge difference between a stock plug electrode and when I trim it back. Problem is, they also wear out rather fast...

I'll buy em. Worst case scenario, I am out $12.

[Slide Panda]

Now you've got me curious.  On the Bosch website they say they come pre-gapped and you needed mess with them.  So, sersiously, no more gap gauge before I thread 'em in?

And what places sell them?  I can find them online - but my local autoparts store website want me to search by make and model of the vehicle manufacturer (of course no Ducs listed) and won't allow searches by 'Bosch 4477'

[hypurone]

I went with Iridiums. Hope they work out for ya. But having changed out so many sets in cars when I was a wrench makes me think not. but let us know. They were in my new(used) Chevy truck and it had a miss at idle and ran just OK. I replaced them with NGK double platinums (couldn't find Iridiums) and voila! Idled/Ran like a demon

[Smokescreen]

What is the plug number for iridium plugs on a DS motor?  Does anyone have this?  I'm about to do a maintanance and I'd like to go ahead and replace plugs too.

[hypurone]

I did a quick search on the NGK site: DCPR8EIX

You can double check my findings here:
http://www.ngksparkplugs.com/part_finder/motorcycles/step4.asp?id=654&type=ir

[DEVO!]

I did a quick search on the NGK site: DCPR8EIX

You can double check my findings here:
http://www.ngksparkplugs.com/part_finder/motorcycles/step4.asp?id=654&type=ir

Those are the ones I got, does anyone know if they come pre-gaped?

[Popeye the Sailor]

Those are the ones I got, does anyone know if they come pre-gaped?

I regap plugs before I install them. It's safer.

[hypurone]

Those are the ones I got, does anyone know if they come pre-gaped?

I regap plugs before I install them. It's safer.

Also, be aware that Iridiums take less energy to fire and use a smaller gap by design. Also, be very careful when gapping them as the center electrode is very fine and you can break it even if you are not hamfisted with it. Here are some guidelines from the site:

3. Gapping

Since the gap size has a direct affect on the spark plug's tip temperature
and on the voltage necessary to ionize (light) the air/fuel mixture, careful attention is required. While it is a popular misconception that plugs are pre-gapped from the factory, the fact remains that the gap must be adjusted for the vehicle that the spark plug is intended for. Those with modified engines must remember that a modified engine with higher compression or forced induction will typically require a smaller gap setting (to ensure ignitability
in these denser air/fuel mixtures). As a rule, the more power you are making, the smaller the gap you will need.
A spark plug's voltage requirement is directly proportionate to the gap size. The larger the gap, the more voltage is needed to bridge the gap. Most experienced tuners know that opening gaps up to present a larger spark to the air/fuel mixture maximizes burn efficiency. It is for this reason that most racers add high power ignition systems. The added power allows them to open the gap yet still provide a strong spark.

With this mind, many think the larger the gap the better. In fact, some aftermarket ignition systems boast that their systems can tolerate gaps that are extreme. Be wary of such claims. In most cases, the largest gap you can run may still be smaller than you think.

[DEVO!]

Where can i get the gap info for a 695?

[hypurone]

Should be .027 according to a couple of spark plug sites I checked but it should also be in your manual...