1990 and newer KX500 Cylinder and Piston Specs

[Sandblaster]

1990 and newer KX500 Cylinder and Factory Piston Specs.
If you are using any other piston be sure to check with the manufacture of that piston for the specs.
Yes, forged pistons need more clearance then cast.
Be safe, go the piston manufacture for clearance specs!!!
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Cylinder Diameter New
86.020-86.035mm OR 3.3866-3.3872" ----- Service Limit 86.10mm OR 3.390"
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Piston New
85.905-85.920mm OR 3.3821-3.3827" ----- Service Limit 85.76mm or 3.3764"
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Piston to cylinder clearance (Stock cast piston)
.100-.130mm OR .0039-.0051" ----- Service Limit .0052"
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