19" rear wheel?

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by Gaz147, Aug 5, 2018.

  1. Gaz147

    Gaz147 n00b

    Joined:
    Aug 4, 2018
    Oddometer:
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    Location:
    UK
    I'm looking at buying and customising a 950 but still have a few unanswered questions and it would be great for a little help:

    1. Will a 19 inch rear wheel fit in all the swingarms? I seem to recall reading that the adv swingarm was a little longer, but do they all still provide the same rear wheel clearance, or at least enough for a 19"

    2. Are all the different versions basically the same without the bodywork on in terms of frame, intake etc? I've seen the frames all have different part numbers, but it seems there are only small differences like different brackets welded on, so like 99% similar. I will be making my own body work / fuel tank. (all the 950's have external fuel pumps?)

    3. Is there an engine management system that will throw up errors / engage limp mode / cut ignition if I run without switchgear / lighting / dash?

    4. Do the different models have differences in power / torque more than what could be explained due to intake and exhaust differences? I'm thinking if I end up with an adv then I'll get the smr header for a 2-1

    5. Higher mileage are ok for the most part? Loads around with circa 50k, seems hard to justify and extra £2k for a <30k miles bike

    6. Will the sm oil tank fit on the adv?

    That seems to be about all for now! I'm tempted by a 990 as they seem cheaper, but probably a lot more hassle with the fi system and removing abs for minimal power gain. Plus much easier to tune the carb for all the changes.

    Thanks!
    #1
  2. Racer111v

    Racer111v Long timer

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    Aug 21, 2011
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    1. Tire outside diameters on 19" tires are roughly the same as 18" tires. I use 18" and 19" rears back and forth on my YZ250 with out any issues.

    2. Not sure on the frames, but any bike with the carbs higher than the fuel petcock needs a fuel pump.

    3. Aside from the safeties for the sidestand and the clutch/starter, there is nothing on the 950s.

    4. I think the smr has different cams, and a little more peak power.

    5. 50k isn't an issue if the bike is in good shape. Not run underwater, over rev'd, dirty air filter, etc...

    6. Don't know about the sm oil tank fitment.
    #2
  3. Gaz147

    Gaz147 n00b

    Joined:
    Aug 4, 2018
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    Location:
    UK


    Thanks for the great reply. I'd be going from the 150/70-18 standard to 140/80-19, so I decided to actually do the math! The 19" is radially bigger by 19.7mm, the swingarm has 20mm adjustment and I imagine enough clearance between the tire at min wheelbase to allow me to get the right chain tension. Everything else sounds good, might have to get the wallet out
    #3
  4. Racer111v

    Racer111v Long timer

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    Aug 21, 2011
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    No problem. I have a new Motoz 140/80-18 on the bike now. Middle of the axle adjustment and it is about 1" from the plastic guard, and 2" from the swingarm. It's a 2004 950 adv.
    #4
  5. tomdubz

    tomdubz getting there

    Joined:
    Jun 29, 2010
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    £2k for 20k miles of future use seems like a good trade. 50k can be considered average half life. If going through the trouble of custom work, I'd opt for the <30k miles options. That said, I'll probably do the rebuilt custom dirt monster thing with my 75k 990 when the time comes because I like money pits.

    And have you HOWed yet? http://www.ktm950.info/
    #5
  6. shiftymike

    shiftymike Hooligan Schmooligan

    Joined:
    Jul 27, 2008
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    Location:
    Van down by the river!!
    If your bike never leaves the pavement and potholes dont exist in your world have at it. Noooooooo the 19" rear wheels came in vogue for lighter motocross bikes due to the lighter mass but will not survive on a 500++ pound bike. If you cant find an 18" tire to suit then consider a 17" where you can keep a hefty side wall to protect that rim.
    #6