F 650 GS Gearing

Discussion in 'Parallel Universe' started by GOROVN, Nov 24, 2008.

  1. Navaho

    Navaho Long timer

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    That was GPS speed. Yep, speedo shows faster.
    #21
  2. GOROVN

    GOROVN Adventurer

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    i put on the 15T on sunday and rode 30 miles of dirt as a shake down. I was pretty pleased. I did far less clutch slipping in slow tight maneuvers...which is good for a noob, one less thing to think about.

    I will get it on the road after the rain stops in phoenix this weekend and post RPM at cruising speeds.

    I bought the 16 as well. i will play with that a little later.
    #22
  3. Chairman

    Chairman Everyday is Friday

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    I have a rattle in my gearbox when I ride below 3000 RPM. My dealer said just go faster. I don't know anyone that has one so that I can ride their bike to see if this is normal. I really don't think BMW would build a bike that does this. I would like some input so I can have a little arguing power for my next meeting. I am also having problems finding neutral. Help
    #23
  4. GOROVN

    GOROVN Adventurer

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    It would be hard for you to ride mine given the distance...i can tell you Neutral is almost too easy to find on my bike. a lazy shift from 1st to second almost always leaves me in neutral.
    #24
  5. Navaho

    Navaho Long timer

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    Does it happen only when you are moving, or does it occur if you rev to a certain rpm in neutral?
    #25
  6. Chairman

    Chairman Everyday is Friday

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    It happens when moving.
    #26
  7. GOROVN

    GOROVN Adventurer

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    With the 15T and a TKC80 130/80 rear tire i see ~4750 RPM at 70 MPH (gps speed)
    #27
  8. jensht

    jensht Adventurer

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    Happens to mine and another F 650 GS that I know. I haven't looked into it much since I haven't ridden the bike lately (not hardcore enough for ice and snow :cry). But I haven't heard it mentioned in any bike reviews, so I wonder what is up with the noise. I will mention it to the dealer when i bring the bike in for the first 1000km service.
    #28
  9. Dave92029

    Dave92029 Been here awhile

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    If my bike had a rattlein the gear box I would immediately check the oil level and then the chain tension. If both were according to to owner's manual then I would insist that the dealer fix it! If the dealer you purchased the bike will not assist then I would write a polite letter to BMW requesting their support.

    Good luck. Please tell us how this situation is resolved.
    #29
  10. OaklandLion

    OaklandLion Been here awhile

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    Chairman - I don't have a rattle and N is very easy to get into. If you get to Nor Cal on business or pleasure, let me know and I'll let you ride my F650gs.

    Gentleman - please keep me posted on the gearing options. I appreciate it.

    Happy Holidays to all.

    BG
    #30
  11. Navaho

    Navaho Long timer

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    Today I took the 16T sprocket off the 650 and put the 17T back on. I prefer the lower engine speed at cruise. The 16t gave the bike great midrange pull. But the cruise speed was buzzier and the slow speed improvements really are not needed for a bike that will not see much slow speed technical riding.

    For comparison, I recorded the cruise speeds at two rpms. These are all ACTUAL speeds as recorded on the gps. Indicated speeds were much higher.

    With 16T sprocket: 4500 rpm = 69 mph, 5000 rpm = 76 mph
    With 17T sprocket: 4500 rpm = 75 mph, 5000 rpm = 82 mph

    With stock 17T sprocket, the bike is running easy at 4000 rpm and 70 mph actual. Fuel economy is in the mid 50's with the 17T and in the low to mid 40's with the 16T.
    #31
  12. NHBill

    NHBill Loosely Wrapped

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    I have the same rattle, although I have been wondering if it's engine knock or in the gearbox. Seems to happen no matter which gear I'm in so I'm leaning towards knock at this point. And yes, the oil is fulll and the chain is tight.

    As far as shifting goes, I haven't noticed any problems at all.
    #32
  13. Boggerboggette

    Boggerboggette Bogger

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    Check out wunderlich website. They offer 16 and 17 tooth sprockets and 41 and 42 teeth rear gears as well as chains for the 800gs and 650gs. Check out the cruise control too, it works backwards (read the customer review) but is pretty sweet on long highway rides.
    #33
  14. lmclamore

    lmclamore Citation Collector

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    I am plenty happy with Wunderlich's 16T sprocket and throttle control on my 798.
    #34
  15. nickgindy

    nickgindy KLR Basher

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    I recently went to a 16 /41 sprocket combo as well. The 16 definantly gives a stronger feel in first and 2nd gear off road. You sacrifice at highway speeds though. Its real buzzy at 80+mph. I am riding from indianapolis to coloraso springs and then up into upper montana in September and am debating on throwing the 17 backnon or having the 17 on until coloradi springs and then switch it out for the 16 in the hills. I defjnantlh love how better it pulls up hills with the 16. The 17 seemed like you were down shifting alot when it came to hills.
    #35
  16. itsatdm

    itsatdm Long timer

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    If you order through Touratech, get the higher priced sprocket. I have a 15 and 17 tooth for my F800. The 17 looks like it has been media blasted and slips right on, the 15 tooth is as cast and is too tight on the splines.
    #36
  17. Geoffster

    Geoffster Fool - Born This Way

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    I put a 16 on my F700 (NB: it came with a 42 tooth rear) and once I adjusted to how DIFFERENT the bike feels, I haven't looked back.

    I'm even toying with trying a 15 to see how it feels at low speeds off-pavement. The stall speed with a 16 tooth is still in the low teens. On my prior bike, a G650X-Country, I went to a 15 and my stall speed dropped to 9 mph on level ground. (Stall speed is defined as the speed at which the clutch must be pulled in to keep the engine from stalling with no throttle input, after the bike is already rolling, of course.)
    #37
  18. Barbadi

    Barbadi Been here awhile

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    ...changed my frond sprocket set to the f 800 GS's one. Factory BMW item the dealer got me with no problem.

    I 'm never going back to stock. Better shifting, better holding to course in tight bends, better off road, even better -slightly- fuel economy.

    just some rear tire sliping when I hurry off a traffic light. :evil

    Makes me wonder why the f@ck the Germans didn't put it there in the first place...
    #38
  19. The Beacon

    The Beacon n00b

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    My daughter has been riding a 2003 F650 GS and claims the bike is "skipping" gears. She was speaking through the scala and complained several times that the bike "went into neutral" from 3rd or 4th gear. Any suggestion what might be causing this? Appreciate any input before I approach the local dealer's shop, they don't inspire me with much confidence...
    #39
  20. Reaver

    Reaver Outta Here

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    You again!

    How's your clutch these days?

    The singles have many neutrals as it seems. You need to shift like you mean it. I often did that when tired and lazy shifted it. Seems to be common.

    If the chain's too tight it'll be hard to shift if that should happen.
    #40