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Big Bore Cylinder Kit - 41001-K01

  • Part #:
    140420
  • Mfg Part #:
    41001-K01
  • OEM/Ref#:
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Big Bore Cylinder Kit - 41001-K01

  • Part #:
    140420
  • Mfg Part #:
    41001-K01
  • OEM/Ref#:
MSRP: $595.85

Price: $536.27 10% off!
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Cylinder Works Big Bore Cylinder Kit - 41001-K01

+4mm Big Bore Kit Makes it a 434cc

  • 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: 11.3:1
Bore: 94mm

REPLACEMENT PARTS:

Replacement Big Bore Cylinder: MFG No. 41001
Replacement Big Bore Piston Kit: MFG No. 41001-P01
Replacement Big Bore Piston Rings: MFG No. 41001-R01
Replacement Big Bore Gasket Kit: Dennis Kirk No. 26-3954



Included Items:

(1)  Cylinder head

(1) Piston

(1) Wrist pin

(2) Cir-clips

(1) Top ring

(1) Second ring

(1) Spacer ring

(2) Oil rings

(1) Base gasket

(1) Engine case gasket

(2) Exhaust gaskets

(1) Head gasket

No instructions

Specifications
Bore Size 94 mm
Compression Ratio 11.3:1
Mfg #: 41001-K01
Part #: 140420
Type Big Bore Kit
Units Each
Weight 4.40 lbs
Alternate/OEM Part Number(s):
09310135
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Fitment for Cylinder Works Big Bore Cylinder Kit - 41001-K01

Part 140420 fits the following machines

Arctic Cat
  • 400 DVX 2004-2008
  • 400 DVX Tony Stewart Edition 2006-2007
Kawasaki
  • KLX400R 2003
  • KLX400SR 2003
  • KSF400A KFX 2003-2006
Suzuki
  • DR-Z400 2000-2004
  • DR-Z400E 2000-2007
  • DR-Z400S 2000-2009, 2011-2019
  • DR-Z400SM 2005-2009, 2013-2019
  • LT-Z400 Quad Sport Z 2003-2009, 2012-2014
  • LT-Z400Z Quad Sport Z Limited Edition 2004, 2009, 2012
  • LT-Z400Z Quad Sport Z Special Edition 2008
Reviews & Questions
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5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
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