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

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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

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R
Ryan Y.
Houston, US
★★★★★ 5
Heavy-Duty Solution for Large Towers — Rock Solid
This CPU holder is exactly what I needed to reclaim my desktop workspace. I wanted to get the computer off the desk to clear up room for projects, but I didn't want to put it on the floor where it’s susceptible to static and pet hair. This mount keeps the tower tucked away under the desk but still within easy reach. Build Quality & Weight: The unit is impressively well-built with sturdy steel. While the specs state it can hold up to 44 lbs, my current build is closer to 20 lbs, and it handles it with zero flex or wobble. It feels very secure once locked in. Design & Airflow: One of the best benefits I’ve noticed is the noise reduction. Having the case mounted under the desk surface helps shield the sound of the fans, creating a quieter workspace. The open-frame design is also great for airflow and keeps all the ports easily accessible. It’s highly adjustable (width 7.7” to 11.8” and height 20” to 25.8”), so it should fit almost any full-size case. Installation Tip: Installation was straightforward, though I’d recommend measuring your desk thickness first to ensure it can support the weight. If you’re looking for a solid, full-size PC holder to keep your system off the floor, this is a great choice. It feels like a professional-grade mount that will last through several different builds.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
R
Richard
Alexandria, US
★★★★★ 4
Great way to keep your PC off the floor, especially with a standing desk
This mount is a great solution if you want to get your desktop tower off the floor and clean up the space around your desk. The construction feels very solid and once installed it holds the PC securely without any wobble. I like that the frame is adjustable so it can fit different case sizes, and the open design allows for good airflow while still supporting the case well. It is especially helpful if you have a standing desk. Keeping the tower mounted under the desk means all of the cables move with the desk when it raises or lowers, which makes everything much cleaner and easier to manage. Installation takes a little planning to line things up correctly, but once it is mounted it feels very secure. If you want a cleaner workspace and a better setup for a standing desk, this mount works really well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2026
V
Viner369
New York, US
★★★★★ 5
Built Like a Tank… Maybe Too Big
This thing is solid. The build quality is exactly what you want when you’re hanging a PC under a desk—sturdy steel, secure mounting, and plenty of adjustability to fit larger cases. It definitely does its job of getting your tower off the floor and out of the way. That said, size matters here—and this is built for big cases. If your setup is more compact, it is overkill. Definitely measure before you commit, because while the adjustability is nice, it’s clearly designed with larger towers in mind. Pros: Very sturdy, confidence-inspiring build Adjustable to fit a wide range of larger PC cases Keeps PC off the floor (less dust, more space) Can mount under desk or on wall Cons: Oversized for smaller or mid-sized builds Requires careful measuring before install Bulkier than some alternative mounts Bottom Line: A heavy-duty mount that does exactly what it promises—just make sure your PC actually needs something this big before you commit.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026
J
Justin P.
Cuba, US
★★★★★ 5
My god
Build Quality The steel construction is very solid and feels durable enough to support a desktop tower or similar device. The powder-coated finish also helps protect against scratches. Comfort / Ergonomics Mounting a PC under the desk helps free up floor space and improves overall desk organization. It also keeps the computer elevated away from dust and improves airflow. Features The adjustable frame allows it to fit a variety of PC sizes, which makes it versatile. The mounting brackets feel strong and secure once installed. Ease of Use / Installation Installation requires basic tools but is fairly simple. Once mounted, the adjustable brackets make it easy to secure the computer in place. Cleaning / Maintenance Keeping the PC off the floor makes cleaning around your desk easier and helps reduce dust buildup in the computer itself. Overall Impression This mount is a great solution for anyone wanting a cleaner desk setup. It’s sturdy, adjustable, and keeps your computer safely mounted under the desk. Excellent for improving workspace organization.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 13, 2026
J
Ja
West Palm Beach, US
★★★★★ 5
Rock Solid and Computer / Wall Safe! Last PC Mount you'll ever need.
This is the hardware that you want in your office: robust, no-nonsense, and able to boss you around its workload. I installed a full size PC case/server in it, and it is rock solid once you lock it in. The open-frame design also merits a mention here as it greatly improves airflow and allows you to access ports on the motherboards and other hardware on your rig should you want to during your gaming sessions without bringing too much heat inside and causing headaches. The width of the holder can be adjusted (approximately 7.7” through 11.8”) in width and (approximately 20” through 25.8”) in height so it fits a large variety of towers, so you don't have to worry whether it could fit your set-up or not. Smaller towers may have substantially more wiggle room though. The mount's weight limit is no joke—up to 44 lbs—so you're not sacrificing stability just to save a few bucks. The shells are quite secure, although some people may have wished for a little more tightening bite; they still prevent your equipment from falling off if you accidentally bump on a wall, which is more important than you may think. A little nitpick: the lower wall-mount bracket could have a couple of extra pilot holes to reduce twisting over time. Not a breaker, just a heads-up for all of you who are looking to the long term. Altogether, it's a reliable, solid fix that is well worth the cost, particularly if you're cramming space and airflow in a tight configuration.
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Reviewed in the United States on December 27, 2025

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