SKU: 74972241054

90CC CYLINDER REBUILD ENGINE KIT FOR HONDA TRX90 TRX 90 C90 C90M CUB XR90 CRF90

Sale price$71.79 Regular price$79.77
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Description

90CC CYLINDER REBUILD ENGINE KIT FOR HONDA TRX90 TRX 90 C90 C90M CUB XR90 CRF9047mm Cylinder Head Piston Gasket Top End Rebuild Kit 90cc For Honda TRX90 C 90 ST 90 CRF XR 90 Features: Complete engine cylinder Top end rebuild kit for Honda 90cc. 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, cylinder head, piston, rings, pin, clips & top end gasket kit (you get exactly what is pictured). Includes all

47mm Cylinder Head Piston Gasket Top End Rebuild Kit 90cc For Honda TRX90 C 90 ST 90 CRF XR 90

Features:
Complete engine cylinder Top end rebuild kit for Honda 90cc.
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, cylinder head, piston, rings, pin, clips & top end gasket kit (you get exactly what is pictured).
Includes all gaskets pictured to rebuild top end.
Kit is for standard bore size - 47mm, 13mm 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, Steel
Displacement: 86cc
Bore Type: Standard Bore
Bore Size: STD 47mm
Intake Valve: 23mm
Exhaust Valve: 20mm
Pin Diameter: 13mm
Pin Overall Length: 38.5mm

Replacement Part Number:
Cylinder: 12101-GB1-900
Cylinder Head: 12200-GN8-920
Cylinder Head Cover: 12301-GB6-910
Cylinder Head Cover Gasket: 12391-GW8-680
Cylinder Head R Side Cover: 12331-GB0-910
Cylinder Head R Side Cover Gasket: 12394-GW8-680
Cylinder Head L Side Cover: 12341-GB6-910
Cylinder Head L Side Cover Gasket: 12395-GW8-680
Oil Drain Plug(x2): 12361-035-000
Cylinder Base Gasket: 12191-GW8-681
Cylinder Head Gasket: 12250-GAN-770
Piston (Std): 13101-GT0-000
Pin, Piston: 13111-GB0-910
Piston Ring Set (Std): 13011-HF7-305
Circlips, piston: 94601-13000
Valve Stem Seals: 12209-GB4-681
Carb Insulator Gasket: 16201-HF7-000

Fits Make/Model/Year:
Fit for Honda TRX90 Sportrax 1993-2005
Fit for Honda C90 Cub 1986-2002
Fit for Honda C90M Cub 1985-2003

Maybe also fit Chinese 90cc ATV, such like Kazuma Falcon 90, Baja 90 90U 90R Trail ATV, Baja 90 Wilderness, Roketa 90,Coolster 90,Suni 90 ,Taotao 90 and more.

Will not fit Honda CT90, ST90 - Flat Top Piston will not fit models with domed piston.

Please compare our kit with your original part to make sure this is the correct kit that you want.

(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 Cylinder Head
1x Cylinder Head Cover
1x Cylinder Head Cover Gasket
1x Cylinder Head R Side Cover
1x Cylinder Head R Side Cover Gasket
1x Cylinder Head L Side Cove
1x Cylinder Head L Side Cover Gasket
2x Oil Drain Plug
1x Cylinder Base Gasket
1x Cylinder Head Gasket
1x Flat Piston
1x Piston Pin
1x Piston Ring Set
2x Circlips
2x Valve Stem Seals
1x Carb Insulator Gasket
1x O-Ring kit

Note:
Please note that this kit is intended to be installed in it's entirety.
It is built to work as a unit and will not necessarily be an exact swap with individual existing components on different Honda 90 models.
Please confirm that the engine in your bike is the year and model you expect.
Some of these bikes are over 50 years old now and are not always all original.

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: 74972241054

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Gearheaddaddy
Houston, US
★★★★★ 5
Black but don’t worry it is supposed to be. It works!
Size: 1 Liter
This stuff looks like used motor oil but don’t worry that is the molybdenum disulfide (MoS₂) which is black. This stuff in a small engine makes it smooth as silk. I used it all season in my leaf vacuum small engine. I could hear the difference. It was quieter and smoother.
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Reviewed in the United States on December 7, 2025
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Matthew Vaughn
Los Angeles, US
★★★★★ 5
High Quality Oil
Size: 5 Liter
Good quality oil! I was just buying the mos2 separate until now
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Reviewed in the United States on January 15, 2026
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Francisco Antonio
Fort Morgan, US
★★★★★ 5
Recomendado
Size: 5 Liter
Uno de los mejores aceite
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Reviewed in the United States on March 11, 2026
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DanPurserMD
Belleville, US
★★★★★ 5
Works just like the Mercedessource guy said it would.
Size: 5 Liter
After viewing a Mercedessource video (trusted Mercedes repair advice Youtuber and blogger) on which oil he liked for higher mileage Mercedes he pointed this out Semi-synthetic 10w-40 out. Called it “muddy” oil. Said it possibly helped with small oil seal leaks and seemed to slow oil loss in higer miles Mercedes. Also made the engines run more quietly. So I have been using in my wife’s high mileage Mercedes (185,000miles W211 2004 E500 4matic) which we baby and I work on. A true very high compression super car, everything he said at Mercedessource has turned out to be accurate. No more leaks. Quiet lifters. Cooler running. Wow. I had been using Mobil 1 full synthetic 0W-40 European Car Formula exclusively but tried this for the seal protection. Works great and no, it is not Mercedes spec but I will see when the harsh Utah winter hits. May switch to the Liqui-Moly 5W-40 Leichtlauf full synthetic (which does meet Mercedes 722.9 oil spec) for winter (I change the oil every 6 months regardless). Thanks for reading.
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Reviewed in the United States on July 12, 2018
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Dale Bailey
Lowell, US
★★★★★ 3
I typed in 5 QT Containers in search line.
Size: 1 Liter
Containers were not 5QT. like I had typed into search bar. They Are 1QT. Lots of Money for ONE QUART OF OIL
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Reviewed in the United States on February 25, 2024

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