KTM 690 Enduro R sprocket change advice needed

Discussion in 'Thumpers' started by SportsGuy, Apr 23, 2015.

  1. renogeorge

    renogeorge Let's ride!!

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    I'll be re gearing mine in the next few days and I can let you know. I am guessing the OEM chain will work with 15/48. But it will be close. I have about 1/2 " of forward movement left with adjuster block on the short side. I am also going 48 rear and hope to be able to change between 15, 16 and 17 front. But I will replace chain.

    BTW, I couldn't find a 14 from KTM. Maybe available aftermarket. CS sprocket is different from smaller singles and 950/990s.
    #21
  2. DrKayak

    DrKayak Retro Rider

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    I went from stock 15/45 to 14/45 this weekend. Wow... what a difference. Should have done it day one.. Was a little shocked how soon I was in 6th on the back roads. Now 6th in not just for freeways.
    #22
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  3. The Letter J

    The Letter J Long timer

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    The older LC4 (625,640, etc.) front sprockets are exactly the same as the 690. For example, 58033029014 is a KTM OEM 14 tooth front sprocket that will fit the 690 (from the 2005 640 Enduro parts fiche.)
    #23
  4. DrKayak

    DrKayak Retro Rider

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    Is this a dampened 14T? Is there a reason to stay with a dampened CS? I put a non-dampened Sun Star 14T on mine.
    #24
  5. The Letter J

    The Letter J Long timer

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    I'm pretty sure the part number I posted is NOT rubber damped, I was just pointing out that you can buy an OEM KTM 14T that fits as some people prefer to stick with OEM counter shaft sprockets. I couldn't hear or feel any difference using a standard sprocket. I'm not personally concerned with it since the cush hub does a great job at absorbing drivetrain shock and even the rubber dampened sprockets are the same as a standard sprocket, with the rubber just sandwiching over each side, I.E.: the inner and outer portion of the sprocket cannot move separately from each other like a cush hub does. Put a flathead screwdriver between the stock sprocket's steel and rubber and pry it open a little and you will see what I mean.
    #25
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  6. renogeorge

    renogeorge Let's ride!!

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    Good to know on the 640 sprockets fitting. I can't see that the rubber on the OEM sprockets does anything on my 690 or 990.....
    #26
  7. cal08

    cal08 Been here awhile

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    I was trying to find that out as well. The word on other threads is that the dampened sprockets help to meet mandated noise specifications. Others may know more.
    #27
  8. MeinMotorrad

    MeinMotorrad Long timer

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    I've never experienced any difference between the damped oem and non damped after market ones. I wouldn't pay it any thought.
    #28
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  9. Thumper Dumper

    Thumper Dumper Been here awhile

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    Even though the rear foot rests don't affect the performance they still bug me.:photog
    #29
  10. LannisterImp

    LannisterImp Winter is coming...

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    I guess this is an older post. I went 14 on front of my 2016 and does 75 comfortably and gives a better low end off road. I am in process of ordering a 51, so I will go 15/51 because I like the dampened stock counter sprocket (less chain noise). Maybe I should go 15/48 and then throw the 14 on if I am doing technical single track. I want to be able to crawl up those steep rocky or rutted sections. Thoughts? With 15/48 can I get away with my stock chain? Have a chain in the cart too. Love Rocky mountain ATV.com
    #30
  11. N22WLZ

    N22WLZ Been here awhile

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    I installed a 47t on my 2016 when it was new, the stock chain was too short however some have reported them being long enough.
    #31
  12. sprouty115

    sprouty115 Long timer Supporter

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    If you flip the chain adjuster blocks it should fit a 118-link chain.
    #32
  13. LannisterImp

    LannisterImp Winter is coming...

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    Thanks! I just ordered a 48. I will let you know how it goes with the stock chain.
    #33
  14. sprouty115

    sprouty115 Long timer Supporter

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    Count links first! I may have cocked-up the advice:
    - 118links will work with the 15/48 combo, but, in checking the microfiche looks like 116 is the stock length for all model-year bikes.

    But...I have read on the Wunderfest thread that some inmates swear their bikes came with 114-link chains from the factory. So as I stated above - count the links.
    #34
  15. LannisterImp

    LannisterImp Winter is coming...

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    Good point. Counting links only takes a minute. Might save me an hour. Thanks!
    #35
  16. motocopter

    motocopter Long timer

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    Jumping in here since I would like to get a 47t sprocket for the back with the OEM chain (118l) and front sprocket (15t). Sounds like the 47t is not a problem if the chain length is correct.
    #36
  17. motocopter

    motocopter Long timer

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    Guess after counting 114l two times, I have my answer. The chain tension axle blocks are turned around with the extension bump facing aft. Seems like the 118l as called for in the parts breakdown would be too long with the 45t sprocket.
    #37
  18. sprouty115

    sprouty115 Long timer Supporter

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    I think you're right, there have been several people that have used a 118 link chain with 14/15/16T fronts and a 48T rear, but I haven't heard of anyone confirming 118 works with a 15/47 combo.
    #38
  19. motocopter

    motocopter Long timer

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    Wonder if the dealer would offer the 118l chain if I mention this to them. In a stretch, it could be considered a warranty item as the incorrect chain length is not installed?
    #39
  20. sprouty115

    sprouty115 Long timer Supporter

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    Well, I think you'd be hard-pressed to make a case that you have the "wrong" length chain when it fits on the correct OEM sprockets. Sounds like a good way to piss your dealer off?:1drink
    #40