Dennis Kirk Inc.
Legendary Service... Ask Your Friends - Since 1969
Need Assistance?
Over 150K Powersport Items - In-Stock and ready to ship today! View tires, apparel, helmets, exhaust and more!

Cometic +1mm Big Bore Complete Cylinder Kit - 256cc - 12001-K01

  • Part #: 140669
  • Manufacturer Part #: 12001-K01

MSRP Price: $649.95

Our Price: $584.96

You Save:
$64.99 (10%)
Ships In 3-4 Business Days

Overview of Cometic +1mm Big Bore Complete Cylinder Kit - 256cc - 12001-K01

  • Direct bolt-on, ready-to-install cylinders; require no replating and look virtually identical to the OEM
  • Nickel Silicon Carbide plated for long life
  • Honed to exact size for easy piston installation
  • Big bore cylinders do not require machine work (unless noted)
  • Big bore cylinder kits come complete with gaskets, cylinder, piston, rings, pin and clips

Specs for Cometic +1mm Big Bore Complete Cylinder Kit - 256cc - 12001-K01

Type Cylinder Kit
Type - Top End Kits Top End Kit w/Cylinder
Units Each
Weight 3.05 lbs

Specs for Cometic +1mm Big Bore Complete Cylinder Kit - 256cc - 12001-K01

Type Cylinder Kit
Type - Top End Kits Top End Kit w/Cylinder
Units Each
Weight 3.05 lbs

Fitment for Cometic +1mm Big Bore Complete Cylinder Kit - 256cc - 12001-K01

See if this part fits your ride

Part 140669 fits the following machines

Honda
  • 2013 Honda CRF250R
  • 2012 Honda CRF250R
  • 2009 Honda CRF250R
  • 2008 Honda CRF250R
  • 2007 Honda CRF250R
  • 2006 Honda CRF250R
  • 2005 Honda CRF250R
  • 2004 Honda CRF250R
  • 2009 Honda CRF250X
  • 2008 Honda CRF250X
  • 2007 Honda CRF250X
  • 2006 Honda CRF250X
  • 2005 Honda CRF250X
  • 2004 Honda CRF250X
5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
2
0
0
0
0
Fit
5.0 / 5
Quality
4.5 / 5
Style
4.5 / 5
Value
4.5 / 5
Fit
5 / 5
Quality
5 / 5
Style
5 / 5
Value
5 / 5
Great up-grade
I put this big bore kit on my bike , and wow everything fit excellent and it was so easy. I got so much more power now when i'm up in the mountains and over on the track. It was well worth the money and it was so quick to change out. I'm satisfied and happy with my choice.
March 2, 2010
Fit
5 / 5
Quality
4 / 5
Style
4 / 5
Value
4 / 5
No Review Title Entered By User
Great power increase in my WR450. The C-clips for the piston wrist pin are a bit difficult. I think the design would need a lock ring...All over good choice. Recommend rejetting your carb and a quick shot excellerator pump cover for best performance.
August 7, 2011
Start typing your question and we'll check if it was already asked and answered. Learn More
No questions have been asked about this item. Be the first!

Instructions and Manuals for Cometic +1mm Big Bore Complete Cylinder Kit - 256cc - 12001-K01