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Thread: 84 250R swingarm bolts/bearings

  1. #1
    Join Date
    Feb 2004
    Location
    Tionesta, PA
    --
    5,747

    84 250R swingarm bolts/bearings

    Are swingarm bolts and bearings no longer available for the 1984 250R? I got this impression from another post. If not, what do you guys use to rebuild them? I used a 300EX swingarm rebuild kit for my 350X. Only modification I had to make was to cut down the inner tube by like 1 inch. A little help would be appriciated on this matter. Also - I would love to hear horror/success stories of the dreaded siexed swingarm bolt. My plans are to cut the bolt, then take the frame to the 20 Ton press. It appears someone has been bashing away at the swingarm bolt, as there is not even a nut on it.

    Thanks!
    RIP - Yamahondaman!! You will never be forgotten!
    RIP - Sam Brehm!! Gone but NEVER forgotten!
    RIP - Sandpuppi101 - You will live on in my mind - I miss you friend!

  2. #2
    Join Date
    Feb 2004
    Location
    CUYAHOGA FALLS, OHIO
    --
    1,242

    Discontinued

    Yeah that impression was from me. I really havent looked too hard but.... I know that they are discontinued from honda. Someone on here was talking about making them. I forget who though.
    3-85 ATC 70
    86 ATC 250R
    86 WETBIKE
    01 KX250
    2011 KAW SXR800- 35YR EDITION
    05 HERITAGE/SPRINGER/SOFTTAIL

  3. #3
    Join Date
    Jan 2005
    Location
    Great Bend
    --
    704
    a new bolt would not be hard to machine from raw material. its not a real detailed design. the bolt in my 83R came out with a push of my finger, I got really lucky. my 200X was a real pain in the arse. it took an 18" brass punch and a 10lb. sledge to knock it out. I had to buy a new one at $60 but it was worth it as the new one was in spec for roundnes, the old one wasnt. now for bearings you have a couple options, go to www.hyperparts.com and look up the swing arm bearings, call us if you go to the hospital, or you can get a hold of x.system and have him lathe up a set of nylon bushings.
    1985 KXT 250
    84 KX cylinder
    sprock racing head
    +2" Miltech swingarm
    frame mounted Rad

    1983 250R
    DG head
    290cc Big Bore
    CT pipe
    85R front end
    +1" Miltech swingarm
    2+2 axle NOS NASA
    18x10x9 Hoosiers

  4. #4
    Join Date
    Feb 2004
    Location
    Tionesta, PA
    --
    5,747
    OK - so here is a questions for you all - I think (I have to assume) that the swingarm bolt would be a hardended (heat treated) bolt. Is this true? Would a new one (machined) have to be hardened, or would standard bolt material work?
    RIP - Yamahondaman!! You will never be forgotten!
    RIP - Sam Brehm!! Gone but NEVER forgotten!
    RIP - Sandpuppi101 - You will live on in my mind - I miss you friend!

  5. #5
    Join Date
    Jan 2005
    Location
    Great Bend
    --
    704
    I'm sure the original is hardened as it is a load bearing surface. it isnt hard to harden a piece of steel. get it as hot as you possibley can without warping the bolt and then drop it in a vat of oil and let it cool to room temp and your done.
    1985 KXT 250
    84 KX cylinder
    sprock racing head
    +2" Miltech swingarm
    frame mounted Rad

    1983 250R
    DG head
    290cc Big Bore
    CT pipe
    85R front end
    +1" Miltech swingarm
    2+2 axle NOS NASA
    18x10x9 Hoosiers

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