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Thread: how to identify 83-84 atc250r 300 cylinder

  1. #16
    Join Date
    Sep 2003
    Location
    Elizabethtown PA
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    1,581
    Quote Originally Posted by firefirefire90
    I was just saying, I need something to practice on...so whatever. If you want to get rid of it, I will take it and pay shipping.

    i just want to make sure it's good 1st and i mite be able to sell it or trade something for it

    sorry if it sounded like i was mad about what you said,
    JASON LISKEY

    1985 atc 250r ---- finsh line axle,.fmf exhaust and rictor privateer silencer, prm grab bar.
    2008 KTM 525xc quad ----- HMF exhaust, HRE chromoly stem,
    86 trx 250r --- with after market chromoly frame and everything else done to it
    01 400ex --- with 86 trx 250r motor
    87 250x + 93 300ex both 350x powered
    2 = 86 atc 350x's
    86 atc 250r
    83 atc 185s --- from retired guy not ridden since 87
    Bandito framed 110 with 85 motor and yellow us90 fenders + tank

  2. #17
    Billy Golightly's Avatar
    Billy Golightly is offline Always finding new and exciting ways to not give a hoot in hell Catch me if you can
    Join Date
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    Live Oak, FL
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    15,070
    Blog Entries
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    Yeah I'm not sure if that is accurate or not jason. Perhaps another owner can chime in?

  3. #18
    Join Date
    Nov 2003
    Location
    wales..uk
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    1,318
    here's a pic of the 300r kit but the easiest way of telling is the 300 kit has 7 head bolts and the standard cylinder has 6 bolts
    Attached Thumbnails Attached Thumbnails 300r kit 3.jpg  
    Need Honda ATC TRX NOS restoration parts??? or come check out our ATC brochure site
    www.offroadvintage.com

  4. #19
    Join Date
    Sep 2003
    Location
    Elizabethtown PA
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    1,581
    since the spec page and what i'm measuring dont match is what has me confused.

    does wiseco make pistons for these? maybe that was why they could not get one or maybe the guy was cheap
    JASON LISKEY

    1985 atc 250r ---- finsh line axle,.fmf exhaust and rictor privateer silencer, prm grab bar.
    2008 KTM 525xc quad ----- HMF exhaust, HRE chromoly stem,
    86 trx 250r --- with after market chromoly frame and everything else done to it
    01 400ex --- with 86 trx 250r motor
    87 250x + 93 300ex both 350x powered
    2 = 86 atc 350x's
    86 atc 250r
    83 atc 185s --- from retired guy not ridden since 87
    Bandito framed 110 with 85 motor and yellow us90 fenders + tank

  5. #20
    Join Date
    Jul 2006
    Location
    United States
    --
    7,765
    http://www.qande.com/

    this place has everything to redo the old 300 hondaline cyls, sleeves/pistons/gaskets, everything, I got them saved so when mine goes down I dont have to go searching for parts.

  6. #21
    Join Date
    Jun 2008
    Location
    southern NJ
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    39
    a stock air fooler bore is found in the manual i belive it is 70mm
    life is short ride hard and drive fast!
    1982 250 r Sold
    1985 ATC 70 to get a rebuild has too much crankcase pressure and wont shift need piston, rings
    1985 ATC 200s(this is my mine again)
    need rear foot brake cable cheap tires
    1984 ATC 250r project i need stuff bearing carrier, carb, intake, wiring harness
    plastics,silencer,clutch perch, light and kill switches
    sprocket,handle bars ,handle bar clamps

  7. #22
    sbjones73's Avatar
    sbjones73 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Jun 2008
    Location
    wisconsin
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    414
    yes the bore is 70mm stock. you can do overbores out to about 72.00 i think that is the biggest i have seen. now that is with the stock cylinder.

    and yes the 300 kits have the 7 studs on them, not the 6.
    84 250r gone,
    87 suzuki lt250r trail machine, gone to fund ice racer,
    85 250r ice racing project started !!!!!!

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