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Thread: interchangable heads?

  1. #1
    Join Date
    Mar 2012
    Location
    scotland
    --
    29

    interchangable heads?

    hey people i was workin on my 200s engine and found out the heads no use.now will a 200x head fit or even a 185 head bolt straight on and work fine withouth mods or anything?jst asking to see if anyone has done or tried this.any help would be greatlt appreciated.

  2. #2
    Join Date
    Sep 2010
    Location
    Fl-
    --
    64
    well any ATC 185/200 head will work, as well as the Xr200 head

  3. #3
    Join Date
    Mar 2012
    Location
    scotland
    --
    29
    cheers for that so does that mean the xr200 and the 200x head are the same also

  4. #4
    Join Date
    Mar 2006
    Location
    PA
    --
    3,515
    Back in the late 80s I used a 200s head on my 85 200x so yes they will fit.
    80s......185 atc, Yamaha tri-moto 200, 85 200x with tons of work
    90s......89 Suzuki quad racer 250 (raced 250 A class for 6 years, late 90s.. custom framed 250x with long travel shocks and a built 350x motor.... built Honda 110
    00s...... chomeoly framed 350 RX with all the goodies (thanks to my bro)
    2012.....Replaced the 350x motor for a 444cc YZ426
    WWW.HREATV.COM

  5. #5
    Join Date
    Sep 2010
    Location
    Fl-
    --
    64
    yep the top ends from all the 185/200 cc motors are swap-able from a 1980 185 to a 1985 200x! (and everything in between)
    and then the XR200 top end as well
    and also some Chinese knock offs as well ive seen

    NOTE: 86/87 200X is NOT the same!

  6. #6
    Join Date
    Sep 2007
    Location
    California, USA about 50 miles north of sacremento
    --
    976
    I thought I read in a thread you can swap in the 200x cam or the xr200 cam for higher performance. Might be smoking crack though.

  7. #7
    Join Date
    May 2010
    Location
    Pennsylvania
    --
    49
    Just went through the XR200 cam swap on my 200x and I bent a valve. The valve relief cuts aren't deep enough so I had the piston recut and now I'm waiting for my XR200 head. Kinda a frankenmotor XL185S bottom end, 200x cylinder and piston and XR200 cam and head. haha

  8. #8
    Join Date
    Feb 2003
    Location
    Australia
    --
    927
    The bent valve should not have happened. Valve timing was probably out.

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