SKU: 29330077670

440cc 89mm Big Bore Jug Cylinder for Honda TRX400EX TRX400X Top End Rebuild Kit

Sale price$96.09 Regular price$106.77
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Ships within 48 hours · Estimated delivery Jul 17 - Jul 22

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Description

440cc 89mm Big Bore Jug Cylinder for Honda TRX400EX TRX400X Top End Rebuild KitReplacement Part Number: Cylinder: 12100 HN1 A70, 12100 KCY 670Cylinder Base Gasket: 12191 KCY 672Cylinder Head Gasket: 12251 HN1 003Cylinder Head Valve Cover: 12391 KCY 671Tensioner Gasket: 14560 KCW 851Piston: 13101 KCY 670Pin, piston: 13111 KCY 670Ring Set, piston: 13011 KCY 670Circlips, piston: 90601 KA5 000Fitments: Honda TRX400EX Sportrax 400 2x4 1999 2008 Honda TRX400X 2x4 2009 2014 Honda XR400R 1996 2004Features: Kit includes piston, rings,

Replacement Part Number:
Cylinder: 12100-HN1-A70, 12100-KCY-670
Cylinder Base Gasket: 12191-KCY-672
Cylinder Head Gasket: 12251-HN1-003
Cylinder Head Valve Cover: 12391-KCY-671
Tensioner Gasket: 14560-KCW-851
Piston: 13101-KCY-670
Pin, piston:13111-KCY-670
Ring Set, piston: 13011-KCY-670
Circlips, piston: 90601-KA5-000

Fitments:
Honda TRX400EX Sportrax 400 2x4 1999-2008
Honda TRX400X 2x4 2009-2014
Honda XR400R 1996-2004

Features:
Kit includes piston, rings, pin, clips & top end gasket kit (you get exactly what is pictured).
Cast piston has super-high silicone content for additional strength.
Piston skirts are Molybdenium Teflon coated to minimize resistance/wear and provide extended life.
Piston dome is anodized for superior heat resistance and longer lifespan.
The gaskets use performance materials to increase durability and provide greater reliability.
Includes all gaskets pictured to rebuild top end.
Kit is for big bore size - 89.00 mm.
All of the components within this kit are bolt-on ready for a hassle free installation.

Specifics:
Condition: Aftermarket 100% Brand New
Quantity: 1 Set
Piston Material: Forged Aluminum
Actual Displacement: 440cc
Bore Type: Big Bore
Bore Size: 89.00mm
Stroke: 70.00 mm

Package Includes:
1x Cylinder
1x Piston(Big Bore)
1x Piston Ring Set
1x Wristpin
1x Circlip(2)
1x Cylinder Base Gasket
1x Cylinder Head Gasket
1x Chain Tensioner Gasket
1x Cylinder Head Valve Cover


Note:
Ring end gaps are checked prior to shipment for proper sizing.
Please check out the product and size fits your motorcycle or not before you purchase.

Warranty:
Returns: Customers have the right to apply for a return within 60 days after the receipt of the product
24-Hour Expert Online: Solve your installation and product problems

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 29330077670

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Amazon Customer
Charlottesville, US
★★★★★ 1
Neck came frayed/cut
Size: Large, Color: White
Poor quality. The collar/neck area was cut up/frayed. Never had a chance to return this shirt in the allocated amount of time. Guess we have an expensive rag.
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Reviewed in the United States on February 18, 2026
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Samuel Peavy
West Palm Beach, US
★★★★★ 5
Warm
Very nice and warm for the weather
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Reviewed in the United States on January 18, 2026
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Amazon Customer
Lexington, US
★★★★★ 5
Am impressed
Warm and cozy feel.
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Reviewed in the United States on January 23, 2026
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James W. Hopkins
Grantham, US
★★★★★ 5
Only one minor issue
Color: Haze Blue, Dark Red, Black, Size: Medium
I got these I ran them through the laundry. They didn't seem to bleed at all. I like short sleeve because when I put a long sleeve on under a shirt the sleeves bunch up behind my elbow and I have a hard time pulling the inner sleeve forward. My only complaint is there is no neck tag to indicate which side is front and which is the back of the shirt.
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Reviewed in the United States on March 30, 2026
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Tony Sukiennik
Carnegie, US
★★★★★ 5
Keeps the Sun off my Neck comfortably
Color: Black, Army Green, Light Gray, Size: Large
I go out often in the heat buy must be careful about Sun exposure... These shirts are comfortable even I'm extreme heat and I like that the fabric has stretched... Comfortable to wear even in extreme heat...
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Reviewed in the United States on August 7, 2025

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