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Powroll

13840 Commercial Lp

Crooked River, OR

97760

 

Mail:

PO Box 920

Redmond OR  97756

 

Phone

541-923-1290

 

Fax

541-923-5637

 

Email

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Powroll - 4 Stroke Performance
 
 

 

STOCK SPECIFICATIONS:   

2004-2005    95mm BORE X 62mm STROKE 

11.9:1 COMPRESSION

2006 & Later:  95mm BORE X 63.4mm STROKE 

11.4:1 COMPRESSION (no Powroll products for this engine)

STROKER +1.4mm

#15901

$400.00

Get a true 450cc’s out of your YFZ!

Better torque and throttle response.

We stroke your stock crank assembly, and modify your new OEM piston.

INCLUDES: Work done on your crank and piston.

REQUIRES: Send your new OEM piston for modification. Send in your crank for modification.  Download our Stroker Booklet for details.

RECOMMENDATIONS: For engines with over 200 hours of use, we recommend replacing the rod assembly.

Get more power from your stock 04-05 YFZ!  Powroll recommends the 4 R's:

  • Remove or modify the airbox lid

  • Run a freer flowing muffler

  • Rejet

  • Retard exhaust cam timing

These modifications can boost the YFZ power by 20-25%!

Free from Powroll - instructions for retarding your exhaust cam timing HERE

Powroll Motor Performance

13840 Commercial Lp  Crooked River, OR  97760     Phone (541) 923-1290    Fax  (541) 923-5637

Copyright © 2010 Powroll Inc.  All rights reserved.  All photos and text are the intellectual property of Powroll and cannot be reproduced without permission.

Descriptions and pricing are subject to change without notice.