SKU: 57320487924

1979-1983 Honda CT 125 Cylinder Barrel Piston Kit 12100-383-030 12191-330-306

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Description

1979-1983 Honda CT 125 Cylinder Barrel Piston Kit 12100-383-030 12191-330-30656. 5mm Cylinder Piston Gasket Top End Rebuild Kit For Honda CB125S CL125S SL125 XL125 TL125 CT125 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). The cylinder is made of aluminum for good cooling with an internal cast iron jacket (unlike

56.5mm Cylinder Piston Gasket Top End Rebuild Kit For Honda CB125S CL125S SL125 XL125 TL125 CT125

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).
The cylinder is made of aluminum for good cooling with an internal cast iron jacket (unlike which has a nicasil treatment).
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 bore size - 56.5 mm, 15mm 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: 124cc
Bore Type: Standard Bore
Bore diameter: 56.5mm
Pin diameter: 15mm
Pin Overall Length: 48mm

Replacement Part Number:
Cylinder: 12100-383-030
Cylinder Base Gasket: 12191-330-306
Cylinder Head Gasket: 12251-437-P00
Piston: 13101-383-030
Pin, Piston: 13111-440-000
Piston Ring Set (Std): 13011-383-621
Circlips, piston (2): 94601-15000

Always compare part numbers to your parts schematics and cross reference appropriately.

Fits Make/Model/Year:
Fit for Honda CB 125 S (1976-1985)
Fit for Honda CT 125 (1979-1983)
Fit for Honda CL 125 S (1973-1974)
Fit for Honda SL 125 (1971-1974)
Fit for Honda TL 125 (1973-1988)
Fit for Honda XL 125 (1976-1978)
Fit for Honda XL 125 S (1979-1987)

In 1976, Honda implemented significant modifications to the 125s cylinder head assembly, transitioning from a single-unit design to a two-piece configuration.
While retaining the cylinder's fundamental architecture, engineers enlarged the bore diameter from 56mm to 56.5mm, resulting in increased displacement from 122cc to 124cc.
This revised 56.5mm cylinder assembly, introduced with the 1976 model year updates, maintains complete compatibility with earlier 125s motorcycles despite these technical enhancements.

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

Package Includes:
1x 56.5mm Cylinder
1x Piston
1x Piston Ring Set
1x 15mm Wristpin
1x Circlip(2)
1x Cylinder Base Gasket
1x Cylinder Head Gasket
2x Valve Stem Seals

(Comes exactly as pictured.)

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: 57320487924

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4.4 ★★★★★
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Chelsea H.
Los Angeles, US
★★★★★ 3
Weird smell
Color: White-cooling Basic, Size: Queen(Pack of 2)
The pillows are great for someone looking for something cool and comfortable. We loved them so much that we bought a second pair. However, we were seriously disappointed with the odor of our last purchase. They give off a strong and indescribable chemical/burning plastic smell so nauseating that it’s difficult to sleep with. We’re hoping this issue will resolve with a couple more washes of the pillow cases, but am worried the source is the stuffing itself.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
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Verified Purchase
Ken Hill
Houston, US
★★★★★ 5
helped treat my sore neck
Color: White-cooling Basic, Size: Camping Pillow(Pack of 1)
This pillow — after dialing in the right amount of shredded foam — has greatly helped my sore neck. Initially, I had to remove some foam. Then I gradually added foam until it reached optimum comfort and support. It is also CPAP-friendly — especially when I position my head near the pillow's edge. (I am a left-side sleeper.) I like the travel size because I use a bulky hugging pillow to ease stress on my shoulder and elbow. That makes my side of the bed feel cramped if using a larger head pillow. A smaller pillow is easy to flip end-to-end in the middle of the night. I have spent lots of money on pillows over the years, but this is the best I've ever had for relieving [1] neck pain and [2] CPAP mask seal problems. Very comfortable, supportive, and affordable. I did not notice any unpleasant smell — and I am usually sensitive to that kind of thing. Would highly recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026
M
Verified Purchase
Molly Farrell
San Leandro, US
★★★★★ 5
Love them!
Color: White-cooling Basic, Size: Queen(Pack of 2)
Love them! After 10 years with our MyPillows, they finally lost their fluff. The reviews I read of the MyPillows of today were not good; they didn’t have as much filling as they used to. These pillows remind me of how fluffy our new MyPillows were 10 years ago!! You sink right into them and can mush them however and they stay. These are way cheaper than the Coop and it’s the same concept; add or remove the filling as needed. The cooling side is a huge plus too! You won’t be disappointed with these pillows!
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Reviewed in the United States on May 22, 2026
P
Verified Purchase
Precise Disarray
Bozeman, US
★★★★★ 5
super smooth, silky, stays comfortable feeling. DO NOT DRY or wash with heat
Color: Blue, Size: Queen (U.S. Standard), Set name: Stretchy and Soft, Color: Blue, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
I'm impressed. I have used cooling pillow cases before, and found them effective, but the cooling material have always been on just one side. These are 100% cooling material. The material is super smooth and silky feeling. It is great feeling against hair and skin (even better than my old polyester satin I was using before cooling pillowcases). The material is cool, and does not seem to get hot hot. The pillow cases are super stretchy with a small hidden zipper. They grab onto the pillow and dont loosen up. Makes my pillow look neat and clean, not sloppy from loose material. I can even have two pillows stacked and somehow despite being a smooth material, the pillows dont just slide off each other. The cooling aspect works by not trapping heat, not allowing heat to get to the pillow and hold it there. So yeh, the pillow case will feel warm eventually but if you have a fan, or AC, or flip the pillow, then it is is truly cool. Otherwise in my experience when I use a pillow without this, the pillow just gets hot, stays hot, and even with flipping it feels hot.. because the pillow itself has trapped the heat for remainder of night. Yuck. One thing to know and this is very important-- as I learned the hard way-- DO NOT DRY IN DRYER. DO NOT WASH IN HOT WATER. Heat will destroy the material ability to feel and stay cool. Do you want a regular heat trapping pillow case? Then go ahead and dry these in the dryer a few times and you will have a regular pillow case. HOw do I know? I bought these to replace another set (different brand, same idea, same instructions that I failed to remember). I always dried them in the dryer, and one night after having gloriously cool pillows, I noticed that my pillow was HOT night after night. It was then when looking for another set of pillow cases that I learned that they cant be exposed to heat like that. SO PLEASE, just AIR DRY. And so, after I got these and put them on my pillows, I had a much better nights rest. I remember thinking that I wasnt waking to rearrange my pillows. They were just comfortable all night long. Sure, I'd love an even colder pillow, but our room is on the warm side. But at least I wasnt noting the hot hot pillows anymore.
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Reviewed in the United States on June 6, 2021
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Verified Purchase
Grace
Omaha, US
★★★★★ 5
A must try for hot sleepers!
Color: Blue, Size: Queen (U.S. Standard), Set name: Silky, Color: Blue, Size: Queen (U.S. Standard), Set name: Silky
If you are a hot sleeper these pillowcases are for you! Not only are they silky and beautiful, but they are cool to the touch!The Arc-Chill fabric absorbs heat and instantly cools your skin! If you are prone to insomnia, night sweats, give these a try! They come in a 2 pack and have a few different colors to try out. Highly recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026

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