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Thread: Tri z domes, and porting,help advise .PLEASE

  1. #16
    Join Date
    Mar 2013
    Location
    Baldwin, Wi
    --
    592
    I run a Sprock tri-z head on my 85YZ cylinder. Coolant hoses all fit perfect. I ordered YZ domes for the head and the one labeled "pump gas" has 230PSI I don't remember what the squish was but I run 110 with no issues. I've never even tried the "race gas" dome. I am using a YZ piston and matched the arch on the skirt to the cylinder and added the 2nd boost port. I've added the 2nd boost port to 3 different cylinders with no welding and never had an issue.

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