V-TWIN MANUFACTURING 12-1478 Oil Pump Bypass Valve Kit

( Brand: V-twin Manufacturing ), ( Manufacturer Part Number: 12-1478 ), ( Country/region Of Manufacture: United States ), ( Item Height: 0.75 ), ( Item Length: 4.50 ), ( Item Weight: 0.15 ), ( Item Width: 3.00 ), ( Type: Oil Pump Bypass Valve )

Review V TWIN MANUFACTURING Oil Pump Bypass Valve Kit

Introducing the V-Twin 12-1478 Oil Pump Bypass Valve Kit, a must-have upgrade for your Harley-Davidson motorcycle's engine system. This kit is meticulously designed to improve the performance and longevity of your bike's oil pump and lubrication system.

The V-Twin 12-1478 Oil Pump Bypass Valve Kit includes high-quality, CNC-machined billet aluminum valve bodies that are anodized for durability and corrosion resistance. These valve bodies house the bypass valves, which are designed to help regulate oil pressure, prevent cavitation, and reduce engine wear.

The kit also includes two adjustable bypass valves, each with a 1/8 NPT threaded inlet and outlet. These valves allow you to fine-tune the oil pressure in your engine, ensuring optimal performance under various riding conditions. The valves are made from stainless steel, ensuring they will withstand the rigors of regular use and the harsh conditions of the road.

The installation process is simple and straightforward. The kit comes with all the necessary hardware, including stainless steel lines and fittings, making it a true plug-and-play solution. The installation instructions are clear and easy to follow, ensuring that even the most novice of mechanics can complete the installation with confidence.

By upgrading your motorcycle's oil pump system with the V-Twin 12-1478 Oil Pump Bypass Valve Kit, you'll experience improved engine performance, increased fuel efficiency, and extended engine life. The kit is compatible with a wide range of Harley-Davidson models, making it a versatile and valuable addition to any V-Twin enthusiast's toolbox.

In summary, the V-Twin 12-1478 Oil Pump Bypass Valve Kit is a high-quality, performance-enhancing upgrade for your Harley-Davidson motorcycle's engine system. With its durable, CNC-machined valve bodies, adjustable stainless steel bypass valves, and easy installation process, this kit is an essential addition to any serious Harley-Davidson rider's toolkit.

Buying a V-twin 12-1478 oil pump bypass valve kit can be a consideration for motorcycle owners looking to improve their engine's oiling system. Here are some potential pros and cons of purchasing this part:

1. Improved engine performance: A bypass valve kit can help ensure proper oil pressure and flow to the engine, leading to improved performance and longevity.

2. Better cooling: By allowing excess oil to bypass the oil pump during high RPMs, the engine stays cooler, reducing the risk of overheating.

3. Reduced engine wear: Proper oiling is crucial for reducing engine wear, and a bypass valve kit can help ensure that the engine receives the necessary oil supply.

4. Preventing oil starvation: During hard acceleration, the oil pump may not be able to provide enough oil to the engine, leading to oil starvation. A bypass valve kit can help prevent this issue.

1. Cost: The cost of a V-twin 12-1478 oil pump bypass valve kit may be a significant investment for some motorcycle owners.

2. Installation complexity: Installing a bypass valve kit may require some mechanical skills and tools, and the process can be time-consuming for those without experience.

3. Maintenance: A bypass valve kit may require occasional maintenance to ensure proper functionality.

A V-twin 12-1478 oil pump bypass valve kit can offer several benefits for motorcycle owners, such as improved engine performance, better cooling, reduced engine wear, and prevention of oil starvation. However, the cost, installation complexity, and maintenance requirements may be drawbacks for some. Ultimately, the decision to purchase a bypass valve kit depends on the individual's budget, mechanical skills, and priorities for their motorcycle.

If you are a motorcycle enthusiast who prioritizes engine performance, longevity, and cooling, a V-twin 12-1478 oil pump bypass valve kit may be a worthwhile investment. However, if the cost and installation complexity are concerns, it may be worth exploring alternative solutions, such as using a high-quality oil or adjusting your riding style to minimize engine stress. Ultimately, the decision should be based on a careful consideration of your budget, mechanical skills, and priorities.

Details:

Type Oil Pump Bypass Valve. V-Twin Manufacturing Oil Pump Bypass Valve Kit: Part #: 4908925. This item fits the following machines:: , Harley-Davidson, 1941-1963Servi-Car G, GA, 1941Servi-Car GD, GDT, 1964-1973Servi-Car GE, 1937-1948UL, 1938-1941ULH, 1933VL, 1933-1936VLD, 1935VLDD, 1936VLH, 1941-1942, 1944-1951WL, 1941-1945, 1950-1951WLA, 1941-1944WLC, 1941-1942WLD. Manufacturer Part #: 12-1478.

Overview of V-Twin Manufacturing Oil Pump Bypass Valve Kit: pump bypass valve kit includes spring, plug and screw.

part #: 121478 prices

• $17.66-$149.95

specifications filtertake:

• brand: V-twin Manufacturing
• mpn: 12-1478
• country/region of manufacture: United States
• item height: 0.75
• item length: 4.50
• item weight: 0.15
• item width: 3.00
• type: Oil Pump Bypass Valve

payments filtertake:

• other
• wallet: Google-pay
• credit card: Diners-club

seller filtertake:

• rating: 99.0%
• city: Rush City, Minnesota
• # reviews: 100352

general filtertake:

• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Oil Filters
• condition: New

returns filtertake:

• paid by: Seller
• policy: Returns Accepted
• time: 60 Days

shipping filtertake:

• service: UPS Ground
• class: Standard
• type: Fixed
• transit: 3-5 Days
• cost: $7.99
• carrier: UPS

offer filtertake:

• sold: 0
• quantity: 1
• options: Ship-to-home
• started: August 23, 2025
• availability: In Stock

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