HONDA 12100-KS6-830 Engine Motor Cylinder Head Jug Piston

( Manufacturer Part Number: 12100-KS6-830 ), ( Type: Cylinder Head )

Review HONDA Engine Motor Cylinder Head Jug Bore Piston fits CR125R 1987–1989

The Honda 12100-KS6-830 engine component set is specifically designed for the CR125R motocross bikes manufactured between 1987 and 1989. This complete kit includes crucial parts that are essential for maintaining optimal engine performance, including the cylinder head, jug, piston, and related hardware.

The cylinder head, part number 12100-KS6, is a critical component of the engine as it houses the combustion chamber and the valves. Honda engineered this head with a compact design to maximize power output while minimizing weight. It features two overhead camshafts, four valves per cylinder, and a sophisticated intake and exhaust port design to promote efficient gas flow. This head is made from durable aluminum alloy and comes fully gasketed for easy installation.

The jug, part number 12101-KS6, is the combustion chamber that sits atop the piston in the engine. It houses the spark plug and is responsible for compressing the fuel-air mixture during the intake stroke. The Honda 12101-KS6 jug is designed with a high-compression, hemispherical combustion chamber shape to ensure efficient burning of the fuel mixture. This design provides an excellent power output and throttle response.

The piston, part number 12102-KS6, is the reciprocating component in the engine that converts linear motion into rotational force. Honda engineered this piston with a lightweight, strong design to maximize power output and minimize weight. It features a forged aluminum construction, ring grooves for the piston rings, and a piston pin bore for the connecting rod. The piston also comes with a factory-installed piston ring set.

The piston pin, part number 12103-KS6, is the part that connects the piston to the connecting rod. It is made from heat-treated steel for durability and strength. The piston pin also comes with a factory-installed piston pin bushings for a perfect fit.

The kit also includes a set of gaskets and hardware necessary for a successful installation, including head gaskets, cylinder gaskets, and related hardware. These components are engineered to provide a tight seal between the engine components and ensure a leak-free operation.

In conclusion, the Honda 12100-KS6-830 engine component set is a crucial investment for any CR125R motocross bike owner from the 1987 to 1989 production years. This complete kit contains the essential parts for maintaining optimal engine performance, including the cylinder head, jug, piston, and related hardware. With its durable, high-performance design and easy installation process, this component set is an excellent choice for any motorsports enthusiast.

Buying a used Honda CR125R engine motor cylinder head, jug, and piston from a 1988 Honda 12100-KS6-830 could be a viable option for those looking to save costs on replacing these parts for their CR125R dirt bike. Below are some potential pros and cons to consider before making a purchase.

1. Cost-effective: Buying used parts can save significant money as compared to purchasing new ones from the dealership or authorized retailers.

2. Availability: Older parts like these may be easier to find on the used market, especially for out-of-production models like the 1988 CR125R.

3. Potential for rebuilding: If you are mechanically inclined, you may be able to rebuild the engine components yourself, which could save even more money and potentially yield improved performance.

1. Quality concerns: Used parts may have wear or damage that could impact their performance or longevity. It's crucial to inspect the parts thoroughly before installation to minimize the risk of issues.

2. Compatibility: Make sure the parts are compatible with your specific CR125R model and year. While the 1988 CR125R engine is similar to later models, there could still be differences that could cause compatibility issues.

3. Warranty: Used parts typically do not come with any warranty, so any issues that arise after the installation would be your responsibility to address and pay for.

Considering the pros and cons, buying used engine components like the cylinder head, jug, and piston from a 1988 Honda 12100-KS6-830 CR125R can be an attractive option for cost-conscious riders. However, it's essential to thoroughly inspect the parts for any damage, ensure compatibility, and be aware of the lack of warranty. If you're confident in your mechanical abilities and the parts' condition, this could be a worthwhile investment, potentially saving you a substantial amount of money. If you have any doubts or concerns, it may be worth considering purchasing new or refurbished parts from a trusted dealer or retailer.

Details:

1988 Honda 87-89 CR125R ENGINE MOTOR CYLINDER HEAD JUG BORE PISTON, This cylinder head is in usable condition but has some minor damage. Has some scoring on the bore. Removed From: 1988 Honda CR125R with miles, Please review all pictures to assess the condition of item. Will need to be Bored/Honed before installation.

Steel sleeve.

part #: 12100ks6830 prices

• $379.93-$399.99

specifications cylindermotorcycleiz:

• for models: Cr125r
• for makes: Honda
• for years: 1987-1989
• mpn: 12100-ks6-830
• type: Cylinder Head

offer cylindermotorcycleiz:

• options: Ship-to-home
• started: November 24, 2025
• quantity: 1
• sold: 0
• availability: In Stock

returns cylindermotorcycleiz:

• time: 30 Days
• policy: Returns Accepted
• paid by: Buyer

payments cylindermotorcycleiz:

• wallet: Paypal
• credit card: Visa
• other

general cylindermotorcycleiz:

• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Cylinder Heads
• condition: Used

seller cylindermotorcycleiz:

• # reviews: 1386
• rating: 99.0%
• city: Loomis, California

shipping cylindermotorcycleiz:

• service: USPS Priority Mail
• type: Fixed
• transit: 5-12 Days
• cost: $0.00
• class: Expedited
• carrier: USPS

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