thumper left logo thumper right logo four stroke performance ktm and quad
thumper lower mid logo thumper mid mid logo
vert line vert line vert line vert line
right navbar
lower left logo my parts
MAKE
MODEL
navbar right
body protection
DVD
gallery
tech articles
specials
thumper news
about thumper racing
contact thumper racing
YZF_WR450Yamaha
Yamaha YZF_WR450
Scream offroad or on the track. We can help you make yours scream, yet maintain reliability
big bore kits
YZF/WR470 Big Bore Kit
YZF/WR470 Big Bore Kit
$352
more info
YZF/WR470 Big Bore Kit With sleeve installed
YZF/WR470 Big Bore Kit With sleeve installed
$502
more info
YZF/WR470 Big Bore Kit Installed in your motor
YZF/WR470 Big Bore Kit Installed in your motor
$677
more info
  -  
ktm 250 to 320 big bore kit
Call: 661.424.1800
top left corner top left corner
| | | | | |
lower left corner lower right corner