Stock 85mm Cylinder Piston Gaskets Top End Rebuild Kit For Honda TRX 400EX 400X
SKU: 67758718274

Stock 85mm Cylinder Piston Gaskets Top End Rebuild Kit For Honda TRX 400EX 400X

Sale price$102.39 Regular price$113.77
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Stock 85mm Cylinder Piston Gaskets Top End Rebuild Kit For Honda TRX 400EX 400XStock bore 85mm Cylinder Jug Barrel For Honda TRX 400EX 400X Top End Rebuild Repair Kit Piston Gaskets Features: If your cylinder blows through, the compression is too low, or even a piston seizure has occurred, then this kit is exactly the right thing for you. Kit includes cylinder, piston, rings, pin, clips & top end gasket kit (you get exactly what is pictured). Piston is anodized for superior heat resistance and longer lifespan. The gaskets use

Stock bore 85mm Cylinder Jug Barrel For Honda TRX 400EX 400X Top End Rebuild Repair Kit Piston Gaskets

Features:
If your cylinder blows through, the compression is too low, or even a piston seizure has occurred, then this kit is exactly the right thing for you.
Kit includes cylinder, piston, rings, pin, clips & top end gasket kit (you get exactly what is pictured).
Piston 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 standard size - 85 mm x 70 mm stroke, 20mm steel piston pin.
This kit is excellent as a low-cost replacement for defects in the original cylinder.

Specifications:
Condition: Aftermarket 100% Brand New
Quantity: 1 Set
Material: Aluminum
Displacement: 397cc
Bore Type: Stanard Bore
Bore Size: STD 85mm
Stroke: 70mm
Pin Diameter: 20mm

Replacement Part Number:
Cylinder: 12100-KCY-670, 12100-HN1-A70
Cylinder Base Gasket: 12191-KCY-671, 12191-HN1-A71
Cylinder Head Gasket: 12251-HN1-003, 12251-HN1-A41
Cylinder Head Cover Gasket: 12391-KCY-671
Starter Cover Gasket: 11377-HN1-010
Oil Pump Gasket: 15151-KCY-671
Tensioner Gasket: 14560-KCW-851
Piston (Std): 13101-KCY-670
Pin, piston: 13111-KCY-670
Ring Set, piston: 13011-KCY-670
Circlips, piston(1.2x20): 90601-KA5-000
O-Ring(1.5x9.5): 91306-MG3-000
O-Ring(35.5x3): 91301-428-003
Exhaust Gasket: 18291-MN5-650
Intake Manifold O-ring(45x2.5): 91303-397-000
Valve Stem Seal: 12209-KL4-005

Fits Models:
Fit for Honda TRX400EX Sportrax 1999-2008
Fit for Honda TRX400X 2009-2014

Fit for Honda XR400R 1996-2004

(Compatibility Chart is for Reference ONLY!!!)
(Please Compare with Your faulty unit and the image we provided to Decide Fitment)

Package includes:
1x Cylinder
1x Piston(STD)
1x Piston ring set
1x Wristpin
1x Circlip(2)
1x Cylinder base gasket
1x Cylinder head gasket
1x Cylinder head cover gasket
1x Chain tensioner gasket
1x Starter cover gasket
1x Oil pump gasket
2x Exhaust gaskets
1x Intake manifold O-ring(45x2.5)
5x O-Rings(1.5x9.5)
4x O-Rings(35.5x3)
8x Valve stem seals

Note:
Carefully compare to your old parts to be sure this is the correct part for your machine.

The product on offer is an accessory or spare part and thus is not an original product of the vehicle manufacturer.
The name of the vehicle manufacturer is stated only as an indication of the determination of the product being offered as an accessory or spare part, to clarify, for which vehicle the product on offer Fits.


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: 67758718274

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.5 ★★★★★
Based on 2495 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
A
Verified Purchase
Albert
Lowell, US
★★★★★ 5
Comfortable and Affordable
Color: Black
I normally dislike chairs like this, but with the budget I had I had to go with something more affordable. It is perfect and love how the handles go up to make a little bit more flush with the desk giving me some more room. The cushion is amazing, lumbar support is perfect for me. Very stable and I sometimes almost catch myself reclining back and wanting to fall asleep. Quality sturdy materials make it easy to attach any additional neck accessories to the chair. 10/10 would recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 2, 2026
A
Verified Purchase
Amazon Customer
Waukegan, US
★★★★★ 4
Comfortable and Stylish Office Chair
Color: Black
The NEO Chair Office Desk Chair Computer High Back is a great addition to my workspace. It was easy to assemble and feels sturdy once put together. The high back provides good support, especially during long hours at my desk. The cushioning is comfortable, and the chair rolls smoothly without any issues. Overall, it looks professional and offers solid comfort for the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 28, 2026
G
Verified Purchase
Giovanna Surace
Belleville, US
★★★★★ 5
Perfect for College Students!
Color: Grey
I first bought this chair back in August of 2023. I used it nearly everyday for several hours. The chair just broke recently- the metal frame bent on the bottom of the chair (probably due to long term sitting and leaning to one side). This a great chair for college students looking for a more affordable but comfortable chair. The wheels move nice and smooth, the arm rests move up and down, and the back mesh of the chair is supportive, comfortable and breathable. To me, the seat of the chair is slightly bigger than a normal desk chair. It reclined decently far back and had a wide range of height adjustments. I just reordered this chair because I love it so much! I recommend this for anyone looking for a affordable, but comfortable desk chair!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 6, 2026
M
Verified Purchase
me
Dallas, US
★★★★★ 5
as great as any 400 $ chair for so much less
Color: Black
This chair is wonderful. Easy to assemble, great home office size, not to overwhelming, very soft seating , great back support, adjustable in height and back. This chair meets all the expectation of a great chair.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
A
Verified Purchase
Amazon Customer
Birmingham, US
★★★★★ 5
This is the chair! Stop looking! You found it!
Color: Grey
Seriously, it's just a great chair. It's comfy, it works, it's well made and it's a fantastic price. I picked this up after trying a "criss cross" style chair that simply was NOT working for everyday, all day home office work. This chair is great and I love that the arms can go up, which turns it into a great art chair as well! The back support is solid, although it's not cushioned at all so you may find putting a little lumbar pillow will help (it hasn't bothered me but over time the elasticity of the mesh has worn a bit) It was very easy to put together and I've been using it everyday, for 8-10 hours a day for several months now. For price you can't beat it. It's also wide enough of a seat I can sit cross crossed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 26, 2025

recommand products