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Thread: Motor swap help.

  1. #1
    Join Date
    Jan 2011
    Location
    mifflinburg
    --
    525

    Motor swap help.

    Thanks ounce again to every1 here.

    i have a 250sx 85 and a 83 185s, Wondering about the 185 what other engine could i get on there?
    I found a 200 but it has electric. looks like it would mount up but idk.. anyhelp

    Also the 250sx, i could only get a 86 250sx right? any difference?

    also. can i bore out the 185s? like 1mm what would that do for my speed?

  2. #2
    Join Date
    Mar 2010
    Location
    Pacific NW
    --
    4,255
    the 250 sx is the same as the 85 86 87 sx and es
    Difference is in the gearing they say.

    The 200 is only 15 or 12 cc larger than the 185 and most people say the difference is not noticable.

    Electric start 200?
    Will it fit?

    Someone surely knows.
    A cam can make a difference but they're not cheap.

    Over bore and larger piston is usually for a worn out engine and not sure if much is notable different.

    I have a couple with high compression pistons and yeah, they run great, like they all do but are a shoulder or kneecap ripper to start.

    The only difference I personally know of is if they start and if they run good and I don't have to walk home.

    Stock is best for me.

    But you'll have fun either way.

  3. #3
    Join Date
    Jan 2011
    Location
    mifflinburg
    --
    525
    Ok thanks again man, um i didn't know there was a 87 250sx

  4. #4
    Silverado's Avatar
    Silverado is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Apr 2009
    Location
    Whitby
    --
    331
    I think there were only 4000 ever made.

    Super rare.
    1985 250sx (Lemon)
    1985 250sx (Ruby)
    1985 250sx (Garnet)
    1985 200m (Hunter)

  5. #5
    Join Date
    Mar 2010
    Location
    Pacific NW
    --
    4,255
    Quote Originally Posted by Headsup View Post
    Ok thanks again man, um i didn't know there was a 87 250sx
    Rare.

    You can use the search key under 'production numbers'

  6. #6
    Join Date
    Jun 2009
    Location
    Tunkhannock,Pa
    --
    904
    i imagine the starter will hit the frame...
    1985 200X
    66mm H&S Piston
    Little Bit Bigger Cam
    Bassani Exhaust

    1985 350X With Bassani Exhaust

    1983 Honda 200E (PARTING OUT!!!!)

    1985 Yamaha Tri-Zinger


    My Feedback Threadhttp://http://www.3wheelerworld.com/showthread.php?105185-Feedback-for-RodKnockRacing&highlight=RodKnockRacing

  7. #7
    Join Date
    Jul 2010
    Location
    ontario
    --
    1,131
    if you want to use the engine with Electric start you will have to cut the frame to fit, or heat it up and heat it up and hit it with a hamer until it clears lol not the best idea you only need about 1/2 or so, if the engine with electric start was high and low range it want fit into the 185 frame because the gear box won't clear the frame as well so i have been told. whats wrong with the 185 engine?
    HONDA WITH A WING AND A PRAYER
    1984 110 project
    1984 125 parts bike
    1983 honda 200x
    19 85x2honda 200x
    1985 honda 250sx
    1985 honda 250es
    polaris p3 should be a parts bike ***gas tank wanted**

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