440 kit head on a 558 - Polaris Riders
 
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post #1 of 1 (permalink) Old 02-20-2018, 05:19 PM Thread Starter
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Join Date: May 2003
Location: Spotsylvania
Posts: 229
440 kit head on a 558

The head cracked between the water jacket and timing chain on my predator, not sure if its repairable. I put a 558 big bore in it years ago. Was thinking about picking up a used 440 kit head to replace. Has anyone heard if/how a 440 kit head will run with a 558 big bore?

2003 Predator. HPD 558 big bore kit, thin head gasket-13:1 compression, HPD valve springs, Mikuni 45mm pumper w/ twist throttle custom jetted by Nicholas Cycle, Nicholas cycle head porting, Vortex programmable CDI, Pure Polaris slip on open ended, UNI clamp on.
dudenhymer is offline  
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