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XS900RR XScream Engine Short Block

$9,400.00

XScream custom billet 7 port power valve cylinder featuring 2 auxiliary exhaust ports. This +10mm stroker amateur competition short block uses 85mm pistons for 885cc displacement (1 over bore remaining to 85.5mm).

Short Block Includes:
  • X Scream Custom billet 7 port power valve cylinder
  • XScream Billet Head & Domes
  • Wiseco Pistons
  • Modified Yamaha 62T cases - Includes XScream epoxy and finger port work, reinforcing front seal area with epoxy, installing a second pulse line fitting, CNC work to match the top case to larger transfer ports on our billet power valve cylinder and boring the cases to accept the +10mm stroker crank.
  • 78mm Billet Stroker Crankshaft (+10mm)


- Requires Boyesen RAD Valve intake, XScream XS900 Custom Intake or a Riva reed spacer

- Also available as top end kit


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  • Manufactured by: X-Metal


This product was added to our catalog on Friday 25 May, 2012.

Copyright © 2018 Team X Scream.