491cc Yamaha YZF Big Bore/Stroker Kit (Stealth)

   

$ 1,264.00 Bolt-on
$    960.00 We mod your cylinder
$    475.00 Optional install and blueprint

YZ491F Stealth Specifications:
Fits 2006-2007 YZ450F
Bore = 97mm Stroke = 66.4mm Displacement = 490.68cc

Engine Modifications Included:
Cylinder: Bore and plated with Apticote 2000 ceramic bore coating.
Piston: New Xtreme coated piston
Stroker: New Crankshaft (un-balanced) - Add $250 and 2-3 weeks for balance.
Compression: Customized to your fuel preference.
Crankcase: No crankcase mods required.
 
 
All of our engine kits are
built using Wiseco Pistons
  weisco
     
 
    
Benefits:
  • Horsepower gain
  • More torque
  • Externally undetectable
  • Good "bang for your buck" kit.
  • True "bolt in" kit - no Case mods required.

Kit includes:

  • Xtreme coated piston kit with piston, rings, wrist pin, circlips.
  • New stroked crankshaft.
  • Top/bottom end gaskets
  • Optional new cylinder

This kit requires you to send us:

  • Entire engine for assembly
  • Nothing for a bolt-on

Delivery: Call for availability.

Notes: Crankshaft balancing is not necessary, but it is recommended. Add $250 and 2-3 weeks.

 
 

 
  Order this kit Now!!!! (click here)  

                                                                                                                                                                                                                                                                         
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  Primary communication points:
  
Telephone: 608 224 2524
Fax:   608 224 0447
Email: techsales@maxpower-engines.com
Web: http://www.maxpower-engines.com
Max Power-RPM’s Inc.
3001 Progress Road
Madison
Wisconsin, 53716, USA
 
Secondary communication point:
Telephone: +44 (0)1452 300800
Fax: +44 (0)1452 500400
Email: aptec@poeton.co.uk
Web: http://www.poetonaptec.co.uk
APTEC Ltd
Southbrook Road
Gloucester
GL4 3DN, UK