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Put a little spark in your life
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RAL88
Flying Brick Rider


Joined: 28 Apr 2004
Posts: 727
Location: New Mexico Land of Enchantment and 365 days of riding USA

PostPosted: Fri Sep 14, 2007 6:50 pm    Post subject: Put a little spark in your life Reply with quote

Well in my never ending search to make my bike run better, go faster and get better gas mileage I decide to try some NGK irridium plugs. Having grown up with Hondas and Kawasakis I always used NGKs and they worked great so I decide to try them in my K1100LT. I have run them for 3000 miles now and I have to say that they really made a difference. I was concerned that even though they were the replacement for the BMW plugs that they may not run at the right temperature. I checked the plugs every 200 miles for the first 600 miles and then every 500 miles after that. You can see in the picture below, and all the plugs look this way that there aren't any temperature issues. These plugs are not cheap. For 4 of them they cost me about $34. The NGK cross reference for the BMW plug # is DR7EIX and the number to order them by is 5686.

The first noticable thing was an increase in acceleration. This was a pretty good increase. My bike was not bad before (I synced the throttle bodies including the screws you are never suppose to touch and that calmed the vibration and smoothed out the throttle a lot). The response was better throughout the rpm range and the acceleration was better than average. The second thing was an increase of 2-4 mpg depending on how I was driving. I have a Fuel Plus and used that to gauge my increase. I was averaging 48 mpg and now I am at 50 mpg and on the way home today at a constant 70 mph and watching my heavy wrist I actually got 54 mpg.

So far I have not seen any negatives but I will keep an eye on them. If you would like to get a little more out of your bike for not to much money I would recoommend giving them a try.


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"If it ain't broke, take it apart and make it work better"
*************
'96' K1100LT-SE
'97' R850GS-R
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hockeyshifter
Flying Brick Rider


Joined: 01 Jan 2006
Posts: 170
Location: harpers ferry WVa.

PostPosted: Sat Apr 26, 2008 2:36 am    Post subject: Reply with quote

looks like i will be doing the plugs and a tire and a oil change and a brake job ... thanks for the post .. trying to find plugs for the rs is a pita
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dave n
Flying Brick Rider


Joined: 13 Dec 2003
Posts: 316
Location: Gastonia NC

PostPosted: Sat Apr 26, 2008 9:14 pm    Post subject: spark plug nivana Reply with quote

No thanks, it's Autolite 4163 for me @ $1.00 ea.
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tmoons
Flying Brick Rider


Joined: 09 Oct 2008
Posts: 161

PostPosted: Thu Feb 05, 2009 8:13 am    Post subject: Re: Put a little spark in your life Reply with quote

RAL88 wrote:
Well in my never ending search to make my bike run better, go faster and get better gas mileage I decide to try some NGK irridium plugs. Having grown up with Hondas and Kawasakis I always used NGKs and they worked great so I decide to try them in my K1100LT. I have run them for 3000 miles now and I have to say that they really made a difference. I was concerned that even though they were the replacement for the BMW plugs that they may not run at the right temperature. I checked the plugs every 200 miles for the first 600 miles and then every 500 miles after that. You can see in the picture below, and all the plugs look this way that there aren't any temperature issues. These plugs are not cheap. For 4 of them they cost me about $34. The NGK cross reference for the BMW plug # is DR7EIX and the number to order them by is 5686.

The first noticable thing was an increase in acceleration. This was a pretty good increase. My bike was not bad before (I synced the throttle bodies including the screws you are never suppose to touch and that calmed the vibration and smoothed out the throttle a lot). The response was better throughout the rpm range and the acceleration was better than average. The second thing was an increase of 2-4 mpg depending on how I was driving. I have a Fuel Plus and used that to gauge my increase. I was averaging 48 mpg and now I am at 50 mpg and on the way home today at a constant 70 mph and watching my heavy wrist I actually got 54 mpg.

So far I have not seen any negatives but I will keep an eye on them. If you would like to get a little more out of your bike for not to much money I would recoommend giving them a try.



What did you pay for them? the are abour 30 USD (converted) in europe... Sad
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RAL88
Flying Brick Rider


Joined: 28 Apr 2004
Posts: 727
Location: New Mexico Land of Enchantment and 365 days of riding USA

PostPosted: Thu Feb 05, 2009 1:11 pm    Post subject: Reply with quote

I paid about $34 USD in 2007. Here is a link to ebay and they have them a little cheaper but that is without shipping.

http://cgi.ebay.com/ebaymotors/FREE-SHIPPING-ngk-spark-plugs-iridium-4-pack-DR7EIX_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2el1116QQitemZ150294150133QQptZMotorcyclesQ5fPartsQ5fAccessories

Just for informations sake irridium is not found naturally on planet Earth. All the irridium that is found was brought here by meteorite and asteroid impacts so there isn't alot of it hence the expense.
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Rich

"If it ain't broke, take it apart and make it work better"
*************
'96' K1100LT-SE
'97' R850GS-R
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Phil Marvin
Rider in the Sky


Joined: 03 Apr 2003
Posts: 1389
Location: El Paso, Texas, USA

PostPosted: Thu Feb 05, 2009 1:50 pm    Post subject: Re: spark plug nivana Reply with quote

dave n wrote:
No thanks, it's Autolite 4163 for me @ $1.00 ea.


+1

Ride Safe,
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Saltcreek
Flying Brick Rider


Joined: 22 Oct 2008
Posts: 954
Location: New Hampshire

PostPosted: Thu Feb 05, 2009 5:45 pm    Post subject: Reply with quote

I did the math. At a 4% increase in mileage from 48 to 50, at $2.00 per gallon you would break even on the difference in plug cost at exactly 18,000 miles. As if you needed another excuse to ride!

How does that Fuel Plus connect?
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Jim

1994 K1100LT Mystic Red, bfd, 37000 miles, sold Sad
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Scott_Anderson
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Joined: 05 Sep 2006
Posts: 2863
Location: Central Iowa, USA

PostPosted: Thu Feb 05, 2009 6:39 pm    Post subject: Re: spark plug nivana Reply with quote

Phil Marvin wrote:
dave n wrote:
No thanks, it's Autolite 4163 for me @ $1.00 ea.


+1

Ride Safe,


Jury's still out on that one for me.

When my bike was in the shop for the burnt valve replacement, they tried to blame it on everything from the Autolites that I was running to the Audiovox CC that I installed and even the gas I was using. Anything that wasn't BMW issued.

Needless to say I don't think I'm going back there anytime soon.
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Jim
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Joined: 17 May 2003
Posts: 3622
Location: WHERETHEFUNNEVERENDS

PostPosted: Thu Feb 05, 2009 7:16 pm    Post subject: Fuel+ Reply with quote

Saltcreek wrote:
How does that Fuel Plus connect?


This is the new version: http://www.fuelplus.com/

The old version that was made only for K bikes and replaced the BMW clock is no longer made. The fuel plus is pretty cool.
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Jim
1997 K1100LTSE 89,900
1995 R100RT Classic 10,000 Beemered
1991 K75RTP 46,000 - in the shop
1992 R100R 22,000 - FOR SALE

"A virtuous man's honesty exists only in proportion to the pyre upon which he atones for it." Lambchop
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RAL88
Flying Brick Rider


Joined: 28 Apr 2004
Posts: 727
Location: New Mexico Land of Enchantment and 365 days of riding USA

PostPosted: Thu Feb 05, 2009 10:18 pm    Post subject: Reply with quote

The fuel plus connects to the motronic brain through the plug and senses the firing of the fuel injectors. It is preprogrammed with how much fuel is used by the injectors which also allows it to accurately give me the remaining fuel in the tank, much better than the gauge. You can also set it for a k100/k1100 or a K75.

Considering the increase in the acceleration and response I got using the NGK I look at it as an investment in the added funfactor of these bikes and that alone, for me over time pays for itself.
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Rich

"If it ain't broke, take it apart and make it work better"
*************
'96' K1100LT-SE
'97' R850GS-R
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Off the grid
Chaotic Good


Joined: 05 Jul 2006
Posts: 3414
Location: At the local taco truck waiting for Jo.

PostPosted: Thu Feb 05, 2009 10:36 pm    Post subject: Reply with quote

Quote:
Considering the increase in the acceleration and response I got using the NGK I look at it as an investment in the added funfactor of these bikes and that alone, for me over time pays for itself.


+1

Plugs are one of those things I refuse to skimp on, like oil filters and tires.
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Saltcreek
Flying Brick Rider


Joined: 22 Oct 2008
Posts: 954
Location: New Hampshire

PostPosted: Fri Feb 06, 2009 8:38 am    Post subject: Reply with quote

RAL88 wrote:


Considering the increase in the acceleration and response I got using the NGK I look at it as an investment in the added funfactor of these bikes and that alone, for me over time pays for itself.


Don't misunderstand my comment. I did the math out of curiosity. I actually expected the payback to be shorter. I think anything we do to increase fuel economy is good. At the end of that 18,000 miles you saved 15 gallons of fuel. And if you actually could get your average up to 54 the benefits are trippled!
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Jim

1994 K1100LT Mystic Red, bfd, 37000 miles, sold Sad
2009 Wilderness Systems Zephyr 155 ST
2002 Litespeed titanium
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Flying Duck
PsyKotic Waterfowl


Joined: 27 Jan 2005
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PostPosted: Wed Mar 18, 2009 8:52 pm    Post subject: Reply with quote

What did you do gap-wise on the DR7EiX plugs? Have you checked/adjusted the gap when you pull them?
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SugarHillCTD
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Joined: 10 Oct 2007
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Location: Livin' at Castle Anthrax, NH, USA

PostPosted: Wed Mar 18, 2009 9:01 pm    Post subject: Reply with quote

Saltcreek wrote:
I did the math. At a 4% increase in mileage from 48 to 50, at $2.00 per gallon you would break even on the difference in plug cost at exactly 18,000 miles. As if you needed another excuse to ride!

How does that Fuel Plus connect?


Jim,

As was mentioned, the older "fuel plus" replaces the digital clock on the dash. My RS came with one already installed. Know what the ONLY function I use is? The digital clock. If someone would like mine, they can have it if I can have their digital clock in a swap.

John
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RAL88
Flying Brick Rider


Joined: 28 Apr 2004
Posts: 727
Location: New Mexico Land of Enchantment and 365 days of riding USA

PostPosted: Wed Mar 18, 2009 10:44 pm    Post subject: Reply with quote

Flying Duck wrote:
What did you do gap-wise on the DR7EiX plugs? Have you checked/adjusted the gap when you pull them?


I check the gaps on all the plugs I install whether it is the bike or the car.

I set the irridium plugs on the K to the factory specs of 0.6-0.7mm (0.024-0.028 in). I only had to re-adjust one. you have to be careful when adjusting because the center electrode is thin and you can break it easier than on a standard plug.

I haven't pulled them in a while and it is probably time to check them. The last time I pulled them is when they had 3000 miles on them and they were fine.
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Rich

"If it ain't broke, take it apart and make it work better"
*************
'96' K1100LT-SE
'97' R850GS-R
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