OEM HONDA 12000-428-305 Top Head Cam Valves End 78

( Brand: Oem Honda ), ( Manufacturer Part Number: 12000-428-305 ), ( Part Type: Valve Head Cam ), ( Country/region Of Manufacture: Japan )

Review OEM HONDA 78 Xl Head Cam Valves Top End Etc fits 250S XR 250 1979–1980

The Honda 12000-428-305 78 80 XL 250S and XR 250 head cam valves top end refer to the cylinder head components from Honda's XL 250S and XR 250 motorcycles produced in 1978 and 1980. These valves are an essential part of the engine's combustion process, controlling the intake and exhaust gases flow into the engine.

The top end of the cylinder head houses the intake and exhaust valves, as well as the camshaft and related components. The intake valves allow the air-fuel mixture to enter the engine during the intake stroke, while the exhaust valves release the spent gases during the exhaust stroke. The camshaft, driven by the crankshaft via the timing gears, operates the intake and exhaust valves through the use of cam lobes and valve springs.

These Honda head cam valves top end are made of high-quality materials, ensuring durability and longevity. The intake valves have a diameter of approximately 30.5mm, while the exhaust valves measure around 25.4mm. The valve stems are designed to fit into the cylinder head, and the valve seats are engineered to provide a tight seal, minimizing gas leakage.

The camshaft is designed to provide the optimal intake and exhaust valve timing, ensuring efficient combustion and maximum engine performance. The cam lobes have the correct profile to operate the valves effectively, and the valve springs provide the necessary force to keep the valves in their correct position during engine operation.

These Honda 12000-428-305 78 80 XL 250S and XR 250 head cam valves top end are crucial components in the proper functioning of the motorcycle's engine. Regular maintenance and timely replacement are essential to ensure optimal engine performance and longevity. The installation process requires care and precision to ensure that the new valves are installed correctly, and the engine is properly reassembled.

In summary, the Honda 12000-428-305 78 80 XL 250S and XR 250 head cam valves top end are essential components of the motorcycle's engine, responsible for controlling the intake and exhaust gases flow. They are made of high-quality materials and are designed to provide efficient combustion and maximum engine performance. Regular maintenance and timely replacement are essential to ensure the engine runs smoothly and efficiently.

Honda XL 250 and XR 250 (1978-1980) Top End Head Cam Valves: A Buying Decision

These motorcycles, manufactured by Honda between 1978 and 1980, are popular choices among vintage motorcycle enthusiasts. Their air-cooled, single-cylinder engines are known for their reliability and performance. However, the top end head cam valves may need replacement after years of use.

i. Improved engine performance: New valves can help restore the engine's power and efficiency, resulting in a smoother ride.

ii. Increased longevity: Replacing the worn-out valves can prevent further damage to the engine and potentially save repair costs in the long run.

iii. Enhanced reliability: A well-maintained engine is less prone to breakdowns, ensuring a safer and more enjoyable riding experience.

i. Cost: Replacing the top end head cam valves can be a costly endeavor, especially if you choose to have a professional do the job. The cost includes the valves themselves, labor, and any additional parts that may need replacement due to wear or damage.

ii. Time-consuming: The process of removing the engine, replacing the valves, and reassembling can take several hours, depending on your mechanical skills and experience.

iii. Risk of damage: Working on the engine without proper knowledge or experience can lead to unintended damage, potentially resulting in additional repair costs.

The decision to buy new top end head cam valves for your Honda XL 250 or XR 250 depends on your budget, mechanical skills, and riding goals. If you value performance and reliability and are willing to invest the time and money, replacing the valves can be rewarding. However, if you're on a tight budget or prefer a more hands-off approach to motorcycle maintenance, you might consider selling or trading the bike for one in better condition.

a. Research and source high-quality aftermarket valves from reputable suppliers.

b. Consult online resources and forums for step-by-step instructions on the replacement process.

c. Consider hiring a professional mechanic to ensure the job is done correctly and efficiently.

d. Set aside a sufficient budget for the project, including the cost of new valves, labor, and any additional parts that may need replacement.

Details:

No other issues o'er areas of concern. Removed from a 1980 XL250S. Domes are clean, cam is nice and smooth, Journal surfaces have no issues. Fits 1878 79 80 XL250S and 1979 XR250.

Show physical condition and items included well fair. Threads, bungs, passages, and mating surfaces look good. No dings or repairs. Clean overall.

Most likely this part is no different. Daily!!!, Everything looks very nice.

part #: 12000428305 prices

• $69.95-$250.00

specifications cylindermotorcycleiz:

• for models: 250s, Xr, 250
• for makes: Honda
• for years: 1979-1980
• brand: Oem Honda
• mpn: 12000-428-305
• part type: Valve Head Cam
• country/region of manufacture: Japan

offer cylindermotorcycleiz:

• options: Ship-to-home
• availability: In Stock
• started: March 4, 2025
• sold: 0
• quantity: 1

shipping cylindermotorcycleiz:

• cost: $0.00
• transit: 4-10 Days
• class: Standard
• type: Fixed
• service: Standard

general cylindermotorcycleiz:

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

returns cylindermotorcycleiz:

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

payments cylindermotorcycleiz:

• wallet: Google-pay
• other
• credit card: Visa

seller cylindermotorcycleiz:

• city: Modesto, California
• # reviews: 297
• rating: 100.0%

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