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Thread: 1998 polaris 500 in a 250r?

  1. #1
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    Cool 1998 polaris 500 in a 250r?

    I have this awsome 2 stroke in my snowmobile and was thinking how awsome it would be to have that 2 cylinder 2 stroke power in a 250r. We timed this machine and it's a shredder!!! 0-60 mph in 5.2 seconds with an entirely stock 500cc engine. Pretty good if you ask me ESPECIALLY for having no gears The suspension was upgraded in factory to rocky mountain king edition suspension. It'd be interesting to see if i could fit that on a 250r swingarm. I would probably have to leave the centrifical clutch design the same as it would be odd to turn the engine into the transmission. I would think about using the same exaust and using it to put a footrest on. The biggest problems would be mounting the engine, finding somewhere to put the three radiators where they'll get enough wind to cool and stuffing the huge cooling and air intake system into the frame. But also remember that this engine isn't as tall as a stock 250r engine or even a 500r because it's a two cylinder and is wider. Here's a video of it running. http://www.youtube.com/watch?v=vDDxuIw62cs. Sadly i don't have any jumping or wheelie vids. Anyways here's some pics



    Any thoughts?
    Attached Thumbnails Attached Thumbnails CIMG3109.JPG   CIMG3108.JPG   CIMG3110.JPG   CIMG3111.JPG   CIMG3112.JPG   CIMG3113.JPG  

    3 wheelers:
    '85 ATC 110 (its my first restoration!!)
    Saving up for a 250r later this year!

  2. #2
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    Some more pics
    Attached Thumbnails Attached Thumbnails CIMG3114.JPG   CIMG3115.JPG   CIMG3116.JPG  
    3 wheelers:
    '85 ATC 110 (its my first restoration!!)
    Saving up for a 250r later this year!

  3. #3
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    ABORTION. Wouldnt even bother cutting a frame for it.

  4. #4
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    I'd trade you, but you're a little far away...
    I could use a snowmobile...

  5. #5
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    yeah man it woudl look horribel and require so much modificationa nd woudl only be good for one thgin drags and definitly not worth the effort
    ok here goes, 85 atc70,2 84 atc70's 83 alt50,83 atc110 , 70 us 90 parot green, 85/86 350x garage queen, stock rider 85 350x, project 85 350x 85 250r drag bike, 2 85 250sx's, alt185, , scat tracker?99blaster,85 250r rider,85 250r ice racer project ,93 kx500,99 xr200r, 91 dr250s ,89 lt500 quadzilla,88 lt250quadracer, 88 trx250r race full on race quad,, 01 yamahakodiak400, kawaki kd100,lt50 for my doughters,93 300ex, 230 quadsport, lt185, lt250 quadrunner,84200s, is that enough?

  6. #6
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    yep haha that's what i thought. it's just that i love this engine! it just has so much raw power! if you put this into a three wheeler you'd be roosting away faster than even the 500r's i think. it'd be fun to try though.
    3 wheelers:
    '85 ATC 110 (its my first restoration!!)
    Saving up for a 250r later this year!

  7. #7
    Join Date
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    Unless you only rode it at the drag strip, it would suck. You wanna go big, but rideable and reliable, use a cr500 motor.

  8. #8
    Join Date
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    Ab Canada
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    If you think that thing go's like stink, try the Dragon 800,
    1985 Tri-Z-

    Quote Originally Posted by mywifeknowseverything
    Just hit the Freakin Gas and Hold on!!!!!

  9. #9
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    Well i know something bigger would go better, but i'm talking about in the 500cc range. I've ridden a dirt cr500 and it was still dang fast, but because this is a two cylinder and has more beefed up parts, a 3 to 1 gear racio and no shifting, it'll honastly accelerate faster and hit a higher topp speed.
    3 wheelers:
    '85 ATC 110 (its my first restoration!!)
    Saving up for a 250r later this year!

  10. #10
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    i would do it man, im planning on using an older sled motor (smaller) in a trike at some point. if you want a badass 2 cylinder shove a banshee motor in, there thin, light and can make more power than any motor just depending on how big you go....

  11. #11
    outtaline is offline My keyboard has no punctuation keys Arm chair racerJust too addicted
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    Sounds like an abortion to me. I don't get the thing with a shee motor when a 250r will out run it

  12. #12
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    a banshee can make over 100 hp fairly inexpensively, a 250r can never....

  13. #13
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    That's why i chose the polaris 500. it's a very short motor and it would only be bout as wide as the bottom end on a regular 250r engine. i'd just have to rig up a clutch guard so i wouldn't hit lit calf on the centrifical clutch.
    3 wheelers:
    '85 ATC 110 (its my first restoration!!)
    Saving up for a 250r later this year!

  14. #14
    300rman's Avatar
    300rman is offline My other user 3WW ID was Nitebiker07. Teaching quads a lesson
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    Quote Originally Posted by hawaiirider View Post
    a banshee can make over 100 hp fairly inexpensively, a 250r can never....
    one word: SABERTOOTH. only problem is, the 250r bottom end doesnt hold up to it for very long. if you could fab the 250r motor/sabertooth top end to, say, a CR500 tranny, or accomodate the cr500 cases to accept the sabertooth parts, you'd have an insane machine, albiet it would get costly.

  15. #15
    300rman's Avatar
    300rman is offline My other user 3WW ID was Nitebiker07. Teaching quads a lesson
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    Quote Originally Posted by somekidwithanm4 View Post
    That's why i chose the polaris 500. it's a very short motor and it would only be bout as wide as the bottom end on a regular 250r engine. i'd just have to rig up a clutch guard so i wouldn't hit lit calf on the centrifical clutch.
    oh, take a look at Erectordales E.T. trike. he did something similar, and the thing hauls ass.

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