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Thread: How many spark plug sizes are there for an 03 R1150RT?

  1. #1

    Angry How many spark plug sizes are there for an 03 R1150RT?

    Hi,
    Recently purchased an 03 R1150RT, which I found out that it was made in 10/02. Not sure how that affects things like plug sizes or not. Just got a 14mm thin wall and it doesn't fit, looks to be too small. It also has and old style coil which uses wires that have a spring type fitting that they no longer make wires for. So I had to order a new coil and wires from the dealer ! Starting to think I should kept my Honda.

  2. #2
    Registered User kioolt's Avatar
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    I've got a 5/8" spark plug socket that I had a machinist turn down the outside so that it would fit into the recess for the spark plug. There are a lot of spark plug sockets that won't fit into the recess but will fit the spark plug. You need to find one that fits both.
    2004 R1150RT 186,800 miles , 1991 K100LT 128,700 miles, 1982 R100RT 106,900 miles
    Total 422,400 BMW miles
    AMA,BMWRA,BMWMOA
    The cheapest thing on a BMW is the nut that connects the handlebars to the seat.

  3. #3
    Liaison 20774's Avatar
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    Welcome to the forum! I tracked down what type of spark plug should be used in the bike as a NGK BKR7EKC.

    https://www.realoem.com/bmw/enUS/sho...diagId=12_1012

    I found an NGK site here:

    https://www.ngk.com/product.aspx?zpid=9354

    and it appears that the hex size is 16mm...or 5/8" which is a tad smaller across the flats.
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
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    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  4. #4
    Registered User rogerc60's Avatar
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    Did a factory tool kit come with your bike? If so you should find a spark plug wrench in there that works fine.

  5. #5
    Registered User
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    Quote Originally Posted by rogerc60 View Post
    Did a factory tool kit come with your bike? If so you should find a spark plug wrench in there that works fine.
    I use this.
    Signature

  6. #6

    Talking

    Thanks to all that offered advice about my spark plug issue !! Ended up as mentioned a 16mm thin wall. So after having to get a new alternator belt and a new coil and wires because the wires on my bike are not made anymore, I finally got the bike put back together and now thunderstorms for the next 2 days. I guess that's the fun of owning an older scoot !!

  7. #7
    Minnesota Nice! braddog's Avatar
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    Quote Originally Posted by wmichal View Post
    Thanks to all that offered advice about my spark plug issue !! Ended up as mentioned a 16mm thin wall. So after having to get a new alternator belt and a new coil and wires because the wires on my bike are not made anymore, I finally got the bike put back together and now thunderstorms for the next 2 days. I guess that's the fun of owning an older scoot !!
    Yeah....my newest scoot is a '94, so I get it. I think...
    -----------------------------------------
    Brad D. - Member #105766
    '77 R100RS - Black Beauty (big pipe, baby!)
    '94 R1100RS - Sylvia

  8. #8

    wrench

    Quote Originally Posted by wmichal View Post
    Hi,
    Recently purchased an 03 R1150RT, which I found out that it was made in 10/02. Not sure how that affects things like plug sizes or not. Just got a 14mm thin wall and it doesn't fit, looks to be too small. It also has and old style coil which uses wires that have a spring type fitting that they no longer make wires for. So I had to order a new coil and wires from the dealer ! Starting to think I should kept my Honda.
    use the spark plug wrench that came with your toolkit.

  9. #9
    Quote Originally Posted by RPGR90s View Post
    use the spark plug wrench that came with your toolkit.
    That is good advice with one big question. How should I attach my torque wrench.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

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