sprockets for BMW F650GS

Discussion in 'Thumpers' started by canuck479, Jun 12, 2008.

  1. canuck479

    canuck479 Adventurer

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    Does anybody know a source for different size sprockets for the F650GS I am looking to get the RPM a little lower at highway speeds.:dunno
    #1
  2. johno

    johno Long timer

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    #2
  3. greer

    greer Long timer

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  4. RivahRider

    RivahRider Windrider

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  5. when the road bends

    when the road bends hello

    Joined:
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    Seattle
    How many miles do the sprockets and chain usually last on highway use?



    Has anyone ever tried any of the lifetime guarateed titanium sprockets?

    I wonder if they even fit our bikes.
    #5
  6. JDLuke

    JDLuke Ravening for delight

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    That's going to depend on many factors, including chain quality and your cleaning/lubrication habits.

    I've seen sprockets that were shot after a few thousand miles, and I've seen sprockets that have lasted 25K miles+ on these bikes. My current set probably has 10K miles on it and everything looks new (I've used both Chain Wax and currently ATF)

    Never tried a Titanium sprocket.
    #6
  7. johnalex

    johnalex Rider of rides.

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    #7
  8. kubiak

    kubiak Long timer

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    if you cant find the right tooth ratio sprocket specialist or specialties cant remember the name correctly can custom make any size you want. they also have sprockets ready in a few sizes for the dakar. i have a 14 and 15 tooth front from them since i wanted more offroad gear ratios.
    #8
  9. jnorton1

    jnorton1 Been here awhile

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    I bought jt sprockets available all over the Internet.
    #9
  10. kubiak

    kubiak Long timer

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    yea i see the jt sprockets all over ebay. i got a few front jt sprockets off there.
    #10
  11. JimR

    JimR Been here awhile

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    If you go over to the "Chaingang" web forum they sell different aftermarket sprockets, you may find a set that suits you.

    As for the high RPM's at highway speeds, the Rotax is designed, and some say it likes, to run at high revs for extended periods of time. At one time Rotax advertised on its website that the engine could run 7,500 rpm's continuously between engine services.

    I get 24k miles out of the OEM chain and sprockets. Very little dirt riding, some gravel, mostly paved roads and commuting. I clean with WD40 and protect from rust with with Honda chain lube every two weeks, more if I've ridden in the rain. IMHO rust, not dirt is the chief enemy of the "O" ring chain. Everyone has there own method, but as stated earlier cleaning and protecting are paramount. Regards, Jim.
    #11
  12. MiamiPhoto

    MiamiPhoto Adventurer

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    Would a 17 front sprocket and a 47 rear sprocket teeth combination good? How do you calculate the front / rear sprocket "teeth" ratio?
    #12
  13. AlwaysGrowin

    AlwaysGrowin Adventurer

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    #13
  14. MiamiPhoto

    MiamiPhoto Adventurer

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    #14
  15. leafman60

    leafman60 Long timer

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    17-tooth front sprockets are readily available from JT Sprockets.

    Manufacturer number is JTF 402.17
    #15