XS900RR XScream Engine Short Block

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