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Thread: rebuilding the '83 r

  1. #1
    Join Date
    Jun 2005
    Location
    Mississippi
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    24

    rebuilding the '83 r

    i'm in the process of rebuilding my 83 250r and setting it up for 1/8 mile asphalt drag. the rod bearing is wore out so i am going to go ahead and put new crank bearings and a new rod in. how much would the labor cost to get the bottom end taken apart and put back together?

  2. #2
    Join Date
    Sep 2002
    Location
    Washingtons Crossing, Pa.
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    2,977
    Should be around $50 to $100 for the shop to completely break it down for an "inspection". Putting it back together is anyones guess - but - I'm sure they wont let you supply the "best price" parts for their rebuild so expect to pay top dollar. I would also be suprised if they would even do just the bottom end, and not the whole motor. Anyway - The motor is so simple, You should really consider doing it yourself.
    J. Jonny D, --- Quad - Trike relations committee Chairman and all around swell guy.

    Rides: '91 Warrior, '87 TW200, 1984 YTM225DX, 1984 ATC125M, '71 CL350 Scrambler

  3. #3
    Join Date
    Jun 2005
    Location
    Mississippi
    --
    24
    i have alot of knowledge with motors i just have never been on the inside of the bottom end. i'm only 14 so i don't have the most experience

  4. #4
    Join Date
    Sep 2004
    Location
    Phoenix, AZ.
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    6,719
    Blog Entries
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    Just get a good manual. If you have a digital camera it's a good idea to take a few pics during the tear down also.

  5. #5
    Join Date
    Jun 2005
    Location
    Mississippi
    --
    24
    i've heard that the crank is pressed in the flywheel side case. is this true? if so how do i get it out? who do i take my crank to, to get the rod put on?

  6. #6
    Join Date
    Apr 2003
    --
    394
    I just had our air R cases split. If you do the crank it will need to go to a specialize machine shop to disassemble the crank, install a new crank pin and bearing. The rod might be suspect as well. A "hot-rod kit" is what youll need.
    The crank bearings are going to be a bit of a job as well. There all press fit and youll have some work ahead of you there too...... Good luck..............
    Attached Thumbnails Attached Thumbnails splitcase.jpg  
    ...... ............
    ..

    84'R pic page; http://magoos.wheatfarm.com/pictures/index.php

  7. #7
    Join Date
    Jun 2005
    Location
    Mississippi
    --
    24
    do you think i could handle this job? is there any obstacles i'm looking at in the teardown process

  8. #8
    Join Date
    Aug 2004
    Location
    Ab Canada
    --
    4,368
    You should be able to do it yourself fine, if you get stuck putting it back togeather just look at parts fiece's on bikebandit or powersportspro.com the crank bearings and rod bearing will have to be pressed out, normally you can get the crank out of the case by tapping the end of it with a rubber mallet
    1985 Tri-Z-

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

  9. #9
    Join Date
    Jul 2004
    Location
    minnesota
    --
    689
    no job too big nor too small for the 20 shop press, which i will be purchassing in a short while.
    my trikes:
    1983 honda atc 200x-k&n filter
    2002 yamaha raptor 660r, yoshimura slip on, prm grab bars
    1978 chevy nova, 454 v8, bds blower, 150hp shot of nitrous, full roll cage, a real power house.
    1991 chevy s10 4x4 350v8.
    1986 250sx
    YES its fast NO you cant ride it.

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