Anyone swap the 990 power plant for another brand?

Discussion in 'Dakar champion (950/990)' started by BigNastybrp, Dec 2, 2019.

  1. BigNastybrp

    BigNastybrp Big Nasty

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    Lately I have wanted a R1 or a motor 130+ in my 990. Has anyone done a swap? I like yamaha motors 27,000 miles before valve adjustment. Sick of it running hot.
    #1
  2. ncj01

    ncj01 Been here awhile Supporter

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    Following
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  3. singlewideteamusa

    singlewideteamusa Been here awhile

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    Might be fun to list some options/possibilities...
    How about the RC51 engine?
    #3
  4. BigNastybrp

    BigNastybrp Big Nasty

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    I was thinking the same
    touno 1100
    Vmax1200
    TL 1000
    But what will fit in the frame and between the tanks?
    #4
  5. Turbominivanman

    Turbominivanman Single track anyone?

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    The vmax won't work. Too wide and heavy. The Honda rc51 might work. The motor that was in my vtr1000 superhawk might have worked also.
    #5
  6. Bonnie & Clyde

    Bonnie & Clyde Wishing I was riding RTW

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  7. singlewideteamusa

    singlewideteamusa Been here awhile

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    Might be fun to stick an air cooled Ducati twin in an SE. No more radiator!
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  8. radmann10

    radmann10 Derf Supporter

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  9. BigNastybrp

    BigNastybrp Big Nasty

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    Less power. Not a gain. In my book.
    Don't get me wrong I love the 990, it has been good to me and in 27000 miles only had one time i could not ride it home. I am just power hungry.
    #9
  10. Simosez

    Simosez go ride your bike.

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    It's a 90deg L not a 75deg V. Front wheel clearance will be the issue with most motors. What about the Aprilia motor? 60 deg.
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  11. Salzig

    Salzig Long timer

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    Superduke 990R. 30ish HP more and direct swap.
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  12. tinwelp

    tinwelp Professional Idiot

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    An unusual approach, but whatever floats your boat. Almost any engine could be made to fit if you really want it, even a bloated lump from a car, if you really really want it. Maybe wise to consider how extensive you're prepared to go with the frame modifications though?

    A 990 SDR is the easiest, drop-in, instant power boost. What'll that give you? 130bhp if you choose well, a bit more maybe with some minor tweaking? Still not enough? Probably the next step up without huge frame modifications is a bigger v-twin from KTM, culminating in the 1290 SDR monster (do you really need more than 170bhp???). Structurally very similar of course, and you've the added bonus of others having gone before you to iron-out the difficulties. If you don't want KTM, but do want the convenience of not having to make most of a new frame, I'd stick with V-twins. There are a few that would work easily enough. For big power you'll need bigish capacity or high speed. Ducati would be an obvious choice... 90° though (but short stroke), so measure carefully. You may end up with no space for a radiator and therefore even bigger cooling issues than you have now! What about a big Rotax from a water-cooled Buell? 72° vee, 146bhp...

    Bear in mind you'll be needing better brakes, and maybe some suspension attention if you increase power a lot. Possibly cheaper in the long-run to just trade in your existing bike and buy something else? Or add another bike to the stable if you're lucky enough to be able to afford it? Not so much fun if you like to fiddle.

    Whatever you choose, please post your progress!!

    Cheers... Paul
    #12
  13. charlie264

    charlie264 Long timer

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    Less weight, better MPG.
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  14. Salzig

    Salzig Long timer

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    FTFY :D
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  15. NVTS

    NVTS Are you ennen oh eff tee Supporter

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    Buell 1125 Helicon?
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  16. LilYoda

    LilYoda Been here awhile

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    Also less seat height, and traded horsepower for more low end torque. Spent a couple hours reading the thread last night when I saw the link here. Amazing work he did there.
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  17. Zuber

    Zuber Zoob Supporter

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    Was less weight due to the engine swap? The Wee-strom motor is close to the 950 motor in weight. I suspect it is heavier.

    The 950/990 KTM is packaged very tight with a compact light engine. Swap in an SD or just get a 1190/1090/1290 bike.
    #17
  18. charlie264

    charlie264 Long timer

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    Cheers.
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