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Big Bore Cylinder Kit - 31001-K01

  • Part #:
    140405
  • Mfg Part #:
    31001-K01
  • OEM/Ref#:
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Big Bore Cylinder Kit - 31001-K01

  • Part #:
    140405
  • Mfg Part #:
    31001-K01
  • OEM/Ref#:
MSRP: $567.57

Price: $510.81 10% off!
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Cylinder Works Big Bore Cylinder Kit - 31001-K01

+3mm Big Bore Kit Makes it a 269cc

  • Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders
  • Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced engine noise
  • Nickel Silicon Carbide plated for long life
  • Kits come complete with gaskets, cylinder, piston, rings, pin and clips
  • Honed to exact size for easy piston installation
  • Big bore cylinders do not require machine work (unless noted)
  • Made in the U.S.A.

Compression Ratio: 12.6:1
Bore: 80mm

REPLACEMENT PARTS:

Replacement Big Bore Cylinder: MFG No. 31001
Replacement Big Bore Piston Kit: MFG No. 31001-P01
Replacement Big Bore Piston Rings: MFG No. 31001-R01
Replacement Big Bore Gasket Kit: MFG No. 31001-G01



Included Items:

(1) Cylinder
(1) Base gasket
(1) Exhaust gasket
(1) Head gasket
(2) C clips
(1) Piston pin
(1) Piston
(1) Spacer ring
(1) Top ring
(2) Rail rings
Instructions

Specifications
Bore Size 80 mm
Compression Ratio 12.6:1
Mfg #: 31001-K01
Part #: 140405
Type Big Bore Kit
Units Each
Weight 2.80 lbs
Alternate/OEM Part Number(s):
09310120
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Fitment for Cylinder Works Big Bore Cylinder Kit - 31001-K01

Part 140405 fits the following machines

Kawasaki
  • KX250F 2004-2008
Suzuki
  • RM-Z250 2004-2006
Reviews & Questions
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5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
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1 Star
2
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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