Fitment is guaranteed or your money back plus free return
Don't waste time installing a product that doesn't fit. We
worked hard ensuring that this product is an exact fit on the
vehicles listed below.
DVX 400 2004-2008
CRF150R 2007-2009, 2013-2019
CRF150R Expert 2007-2009, 2012-2019
CRF250R 4-Stroke 2004-2017
CRF250X 4-Stroke 2004-2009, 2012-2017
CRF450X 2005-2009, 2012-2017
TRX450ER Sportrax 450ER 2006-2014
TRX450R Sportrax 450R 2004-2009
FE 250 2014
FC 250 2016-2020
FC 350 2016-2018
250 SX-F 2005-2020
250 XC-F 2007-2020
250 XCF-W 2006-2014
350 SX-F 2011-2012, 2016-2018
350 XC-F 2011-2012, 2016-2018
KRF750A Teryx 750 4x4 2008
KVF750A Brute Force 750 4x4i 2005-2007
KVF750D Brute Force 750 4x4i 2008-2011
KVF750L Brute Force 750 4x4i 2012-2014
KX250F 4-Stroke 2004-2018
ACE 900 XC 2016
RZR 4 900 EPS 2014-2016
RZR 900 2014-2016
RZR XP 4 900 2012-2013
RZR XP 4 900 Jagged X 2013
RZR XP 4 1000 2018
RZR XP 900 2011-2013
RZR XP 1000 2014-2018
Ranger Crew 900 2014-2015
Ranger XP 900 2013-2014
DR-Z400SM 2005-2009, 2012-2018
LT-R450 QuadRacer 450 2006-2009
LT-Z400 QuadSport 400 2003-2013
WR250F 2001-2013, 2015-2016, 2018
YFM700D Grizzly 700 FI 4x4 2014-2015
YFM700FG Grizzly 700 FI 4x4 2007-2013
YFM700FGP Grizzly 700 FI 4x4 EPS 2007-2013
YFM700P Grizzly 700 FI 4x4 EPS 2014-2015
YFM700R Raptor 700R 2006-2009, 2011-2018
YFZ450 ATV 2004-2009, 2012-2013
YFZ450R ATV 2009-2019
YFZ450X ATV 2010-2011
YXM7D Viking 700 2014-2017
YXM7P Viking 700 EPS 2014-2017
YXR7F Rhino 700 FI 4x4 2008-2009, 2011-2013
YZ250 2-Stroke 1999-2020
YZ250F 4-Stroke 2001-2018
Big bore power
out of 5
on December 21, 2016
Just what I need to get that much more grunt out of my bike. Awesome kit!
Questions & Answers
Can i change my cam to a stage three without having to change anything else or what should i do?
When you install big bore cylinder kit it's recommended to change your cams as well. Any time you change the displacement of the engine, you should match the valve diameter and cam lift to to the bigger set up if you want to get the most power out of the new set up.
Let us know what you'r working with and our team will be happy to help you find a complete kit with everything you need to get the most power from your ride.
Big bore kit additional parts
I have a 2007 yz450f. What aother engine parts should I change to get the most out of the big bore kit? Thanks.
I would suggest looking at the Hot Rods Stage 2 Camshafts for your 2007 Yamaha YZ450F. When used in conjunction with the Cylinder Works Big Bore Cylinder Kit this will give you a larger boost in performance over the stock cam profiles. You can find those cams by simply searching our store for "Hot Rods Stage 2 Exhaust Camshaft" and "Hot Rods Stage 2 Intake Camshaft"
2007 crf150rb when using this big bore kit do I need to replace my cylinder head as well??
The CRF150RB's big bore cylinder kit works with the OEM cylinder head. There's no need to replace it. Though, since you've got everything torn down, you might as well have some head work done as well and take advantage of that extra displacement.
I'm looking at getting this bore kit for my 2009 Kx250f what else should I also get new cams as well
Cylinder Works Big Bore Kits are designed to work with OEM or any aftermarket cams that fit the OEM cylinder head. Just be sure to choose the correct cam for the kind of power you're looking for and you should be all set!