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  1. P

    80 cylinder head assembly on 81 motor?

    Does anyone know if a cylinder head assembly from a 1980 model will fit a 1981? I checked the parts catalog and the part numbers are different for the cylinder head assembly between an 80 and 81, but that doesn't always mean they aren't compatible. Looking at pictures, they look identical.
  2. P

    Potential valve damage?

    I picked up a non-running 1981 XS400 Special. Long story short, the motor spun freely and the starter would spin the motor, but it refused to start. After digging into it, I found that the exhaust valve adjustment screw and locknut had completely fallen out of the rocker arm for the left...
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