BMW K bikes (Bricks)

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1Back to top Go down    spark plug question-1985 k100rs on Sat Nov 08, 2014 7:49 am

jumpinjimmy

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Hi, I would like to replace the plugs in my 1985 K100rs and could only get my hands on the NGK D7EAR (with resistor) rather than the plug without resistance. Does anyone see a problem using these?

jumpinjimmy thanks you in advance for your response.

    

2Back to top Go down    Re: spark plug question-1985 k100rs on Sat Nov 08, 2014 8:07 am

Holister

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The NKG D7EA is the one to use, not the DR7EA. Have a read of this thread.
http://www.k100-forum.com/t8900-new-spark-plugs

Cheers


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

3Back to top Go down    Re: spark plug question-1985 k100rs on Sat Nov 08, 2014 8:49 am

Holister

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Bosch X5DC are the originals so if you can get those probably better.

Alternatively
http://www.sparkplug-crossreference.com/convert/NGK_PN/D7EA


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

4Back to top Go down    Re: spark plug question-1985 k100rs on Sat Nov 08, 2014 6:25 pm

indian036

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@jumpinjimmy wrote:Hi, I would like to replace the plugs in my 1985 K100rs and could only get my hands on the NGK D7EAR (with resistor) rather than the plug without resistance. Does anyone see a problem using these?

jumpinjimmy thanks you in advance for your response.
I would be OK with using them for a short time just to get you out of trouble, but only if they were better than the originals, and then just long enough to get a set of non-resistor plugs.

Cheers,
Bill


__________________________________________________
1985 K100RT Red. VIN 0028991K100RT ENG 104EA248523386
1985 K100RT Blue. VIN 0029036K100RT ENG 104EA25852071
1990 K100LT Black. VIN WB105060310190452
1984 K100RT White. VIN. 0023022K100RT ENG 104EA32848523
    

5Back to top Go down    Re: spark plug question-1985 k100rs on Sat Nov 08, 2014 7:42 pm

AL-58

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If using NGKs make sure you have the screw on tips. The thin threaded tip on the NGK plugs is not compatible with the plug lead caps.

Al


__________________________________________________
'87 K100RS/HRD sidecar (1100 motor)sc25
'92 K100RS-16v (Paint it Black)

'87 K100RT with Paralever backend

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

    

6Back to top Go down    Re: spark plug question-1985 k100rs on Sat Nov 08, 2014 7:56 pm

RicK G

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@jumpinjimmy wrote:Hi, I would like to replace the plugs in my 1985 K100rs and could only get my hands on the NGK D7EAR (with resistor) rather than the plug without resistance. Does anyone see a problem using these?

jumpinjimmy thanks you in advance for your response.
Why do you wish to change?


__________________________________________________
If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

7Back to top Go down    Re: spark plug question-1985 k100rs on Sat Nov 08, 2014 10:06 pm

Be made

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@jumpinjimmy wrote:Hi, I would like to replace the plugs in my 1985 K100rs and could only get my hands on the NGK D7EAR (with resistor) rather than the plug without resistance. Does anyone see a problem using these?

jumpinjimmy thanks you in advance for your response.
2 things here

1. How many K's has your bike done and if it is a lot then
2. Can you be certain the Leads are original type that has the resistor built in to it or are the leads aftermarket ones needing a resistor plug?

Just thinking that's all

Maybe if you are changing plugs and your machine is high K's then new leads would be of great benefit. Also . . it is an '85 so if the leads are original then they are nearly 30 years old and could well be overdue for replacement anyway

    

8Back to top Go down    Re: spark plug question-1985 k100rs on Sun Nov 09, 2014 2:10 am

jumpinjimmy

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To repsond to a few of the posts...This is a high mileage bike, 80,000 miles or more (speedo changed at some point). The reason I would like to change the plugs is that they are at least 7 years old and the bike has been sitting for a long time. I took out the plugs yesterday and had a look. They are NGK D8EA plugs and they only have the threaded ends on them and not the fatter tips. Very odd. Not sure how they could work properly given the type of plug wires caps that are mounted. Anyway, the plug wires are genuine BMW equipment and are most likely original to the bike, so almost 30 years old.

I'm thinking I'll go back to the original Bosch plugs and not use the NGK plugs.

    

9Back to top Go down    Re: spark plug question-1985 k100rs on Sun Nov 09, 2014 2:25 am

Holister

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Old leads can certainly cause performance problems as Be made can attest to, but imo, if they test ok, I wouldn't go to the expense. However, determining whether the leads are original resistance type and they do provide the correct resistance, would be a good idea. The thread (link I posted above) explains how to test leads and coils (thanks to RickG and others).
These are original resistor leads...


The D8EA plugs are a cooler plug, however some members report using them with no problems. Personally, I would find somewhere that can order the D7EAs in or buy them online.

You need to get the connector nut for the end. They don't come with the NKG plug.

Cheers


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

10Back to top Go down    Re: spark plug question-1985 k100rs on Sun Nov 09, 2014 2:32 am

jumpinjimmy

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yep, my leads are exactly like that and stamped BMW.

    

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