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Thread: 250r hp & mph, and any good mods to suggest?

  1. #1
    Join Date
    Jul 2005
    Location
    arizona
    --
    550

    Lightbulb 250r hp & mph, and any good mods to suggest?

    sorry about all the posts lately guys, i know these kinda questions are annoying but i need to know what hp my 84 250r is putting out , and a ballpark on its mph. it has k&n directly on carb, bored .030 over, dg slip on, 15 tooth front sprocket. how fast would it go?, and how much hp is it giving? would i have any descent gains with a reed spacer, new reeds, or a thiner gasket? any other cheap mods to concider? would my bike beat a stock 400ex as it is? thanks for your insight.

    p.s. i think i might have an aftermarket carb, did the keihin pj carbs come stock on 84 r's?

  2. #2
    Join Date
    Oct 2004
    Location
    Anaheim
    --
    1,270
    84 R =28 horses, top end 65 miles a hour, my 84 will be throwing down close or at 45 horses when done, its a top-end power package from trinity, iam writting up a thread on .org about it, the whole kit cost 564 out the door, its a 272cc motor, pro/mx port job for VERY VERY aggresive mid to top band, the head is being milled to 19cc and beign turbo cut, end of the night it should have 210psi it will have a k/n ari filter, bolted to the back of a 34mm carb that will be jetted by trinity for peak performance, if you want keep a check up at .org in performance forum under R guys and tri-zs come in.
    adam
    86 ATC 500R the duner..
    85 ATC 500R...the not quite finished faster duner
    1985 ATC 250R Bone stock!!
    1985 ATC250R mx/duner
    1986 TRX370R MX/Duner
    94 Banshee 400PV Cheetah 105RWHP

  3. #3
    Join Date
    Oct 2004
    Location
    Anaheim
    --
    1,270
    yes thats a stock carb, it should measure 30mm, right now iam not sure if iam sticking on a 85 carb to my 84 or if iam going to have them bench flow/ bore it to 33 mm and just jet it up
    adam
    86 ATC 500R the duner..
    85 ATC 500R...the not quite finished faster duner
    1985 ATC 250R Bone stock!!
    1985 ATC250R mx/duner
    1986 TRX370R MX/Duner
    94 Banshee 400PV Cheetah 105RWHP

  4. #4
    Join Date
    Oct 2004
    Location
    Anaheim
    --
    1,270
    o yours should be at probly 68-70 with the 15 tooth from sprocket, but a stock R would whip yah in acceleration
    adam
    86 ATC 500R the duner..
    85 ATC 500R...the not quite finished faster duner
    1985 ATC 250R Bone stock!!
    1985 ATC250R mx/duner
    1986 TRX370R MX/Duner
    94 Banshee 400PV Cheetah 105RWHP

  5. #5
    Join Date
    Mar 2003
    Location
    West Monroe, LA
    --
    847
    If the R is stock it will run much better from bottom on up with a smaller front sprocket. 15 tooth is just to much for an stock air cooled R and for the liquid cooled R for that matter.
    Last edited by 86250RZ; 07-15-2005 at 03:04 PM.
    86Honda250R
    85Honda250R Sold
    82Honda250R
    Tiger 200 198? Sold
    Tiger 250 198?
    Tiger 80 (need engine) Sold
    85 Tri-Z
    86 Tecate


    Perfection consists not in doing extraordinary things, but in doing ordinary things extraordinarily well.

  6. #6
    Join Date
    Jul 2005
    Location
    arizona
    --
    550
    so i should go back to the 13? with the 15t my chain is about half an inch from touching the swinger, if i downsized on a sprocket would it rub the frame?

  7. #7
    Join Date
    Jul 2005
    Location
    arizona
    --
    550
    if i went back to the 13 tooth and drag raced a stock 400ex, how would i do on a dirt road, 500ft drag.

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