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NGK Plugs
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6899
Mad Brick Rider


Joined: 11 Oct 2006
Posts: 103
Location: Indianapolis, IN

PostPosted: Tue Apr 20, 2010 3:56 pm    Post subject: Reply with quote

Apparently next time I will order the plugs when I get ahold of terminal nuts before replacement time. Smile
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1996 K1100LT, 73K (bought at 61K on 2006)
1977 R100/7, bought new, rode 97K in 29 yrs before parting out
1970 R50/5, bought used, rode 40K & sold

BMWMOA #6899 since 1976
Indy BMW Club since 1975
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max
Flying Brick Rider


Joined: 22 Aug 2005
Posts: 309
Location: NZ

PostPosted: Fri Nov 05, 2010 8:25 pm    Post subject: Reply with quote

Flying Duck wrote:
Why do K75s have different spark plug leads than a K100? Got me.


Because each coil on a 75 only fires ONE plug... 3 coils (for assymetrical timing), 3 plugs.

4cyl engines use the "wasted spark", so one coil always fires 2 plugs.

(Useless info or what?)
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Flying Duck
PsyKotic Waterfowl


Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA

PostPosted: Sat Nov 06, 2010 7:36 am    Post subject: Reply with quote

max wrote:
Flying Duck wrote:
Why do K75s have different spark plug leads than a K100? Got me.


Because each coil on a 75 only fires ONE plug... 3 coils (for assymetrical timing), 3 plugs.

4cyl engines use the "wasted spark", so one coil always fires 2 plugs.

(Useless info or what?)


I understand that. I still don't get why a K75 would need a different plug lead with the resistive gap. Then again I'm no ignition expert.
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86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
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Bob T
Mad Brick Rider


Joined: 11 Oct 2010
Posts: 120
Location: Carol Stream, IL

PostPosted: Sat Nov 06, 2010 8:11 am    Post subject: Reply with quote

Scott_Anderson wrote:
I got a set of caps with the Realm plug wires, so I think that I'm set for the moment.


The Magnecor wires I just bought also came with plug caps...
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