XS1000 Engine Short Block

Our XS1000 Short Block uses an XScream billet power valve 7 port cylinder with a custom +10mm Stroker Crank. This engine delivers extreme power with unmatched reliability for the enthusiast that demands the best. We provide tuning recommendations and support to ensure complete satisfaction with our engine long after delivery.
The XS1000 is also available as top end kit for use with 62T cases.

XScream Power Valves:

• The most innovative valve design available
• Lower profile means they clear Factory B pipe without modification to the head pipe.
• No spacer required.
• Less expensive and more reliable than any other power valves

XS1000 Short Block Features:

• XScream Freestyle Cylinder Porting
• 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, installation of "Disaster" plate and boring the cases to accept a stroker crank.
• XScream Custom Sleeves (90mm to 91mm bore)
• Wiseco Forged Pistons
• Custom cut domes for pump, aviation or race fuel
• +10mm stroker crankshaft with OEM Yamaha bearings
• OEM Yamaha Crank Seals

XS1000 Piston Options: 90mm, 90.5mm and 91mm Custom Wiseco Flat Top Pistons

• 90mm bore = 992cc
• 91mm bore = 1014cc

- XScream Short Blocks require a Boyesen RAD Valve intake or Riva Reed Spacer.
- Custom engraving and colors available, contact us for more information.