J-P CYCLES 16-B1 Crankcase Breather Big 4300150 PRE-93

( Brand: J-p Cycles ), ( Manufacturer Part Number: 16-B1 ), ( Type: Air Filter ), ( Machine Type: Street Motorcycle ), ( Oe/oem Part Number: 4300150 ), ( Items Included: Crankcase Breather Assembly ), ( Material: Metal ), ( Country Of Origin: United States )

Review J P CYCLES Crankcase Breather Assembly #4300150 Fits Harley Big Nib fits TWIN

The 16-b1 crankcase breather, part number 4300150, is an essential component for Harley-Davidson Big Twin motorcycles manufactured before 1993. This breather is designed to help manage the pressure inside the crankcase, ensuring optimal engine performance and longevity.

The crankcase breather is a rubber hose assembly with a diameter of approximately 1 inch and a length of around 12 inches. One end of the hose is fitted with a breather filter, which helps prevent contaminants from entering the crankcase. The other end terminates in a metal fitting that attaches to the engine's breather port.

This breather is specifically engineered for Harley-Davidson Big Twin engines, which are known for their powerful V-twin configuration. The unique design of the crankcase breather allows it to effectively manage the pressure inside the engine's crankcase, which can build up during operation due to the combustion process.

The breather filter is made of a high-quality, micron-rated material that can trap even the smallest particles, ensuring that only clean air enters the crankcase. The filter is also easily accessible for replacement or cleaning, making maintenance a breeze.

The 16-b1 crankcase breather is a crucial part for any Harley-Davidson Big Twin motorcycle, especially those with higher mileage or those that have been modified. Regular use can lead to the build-up of moisture and contaminants inside the crankcase, which can negatively impact engine performance and longevity. By effectively managing the crankcase pressure and keeping out contaminants, this breather ensures that the engine continues to run smoothly and efficiently.

In summary, the 16-b1 crankcase breather, part number 4300150, is a vital component for any Harley-Davidson Big Twin motorcycle manufactured before 1993. Its unique design effectively manages crankcase pressure and keeps contaminants out, ensuring optimal engine performance and longevity. The breather filter is easily accessible for replacement or cleaning, making maintenance a breeze.

Pros and Cons of Buying a 16-b1 Crankcase Breather (4300150) for Harley Big Twin Pre-93

a. Essential Component: A crankcase breather is a crucial part of a Harley-Davidson engine's cooling and emission system. It helps in preventing crankcase pressure, which can lead to oil leaks and engine damage.

b. Improved Engine Performance: Installing a new crankcase breather can result in improved engine performance by allowing the engine to breathe more efficiently, leading to better combustion and increased power.

c. OEM Part: Using an OEM (Original Equipment Manufacturer) part like the 16-b1 Crankcase Breather (4300150) ensures a perfect fit and compatibility with your Harley Big Twin engine.

a. Cost: Replacing a crankcase breather may seem like an insignificant expense, but the price of an OEM part like the 16-b1 Crankcase Breather (4300150) can be higher compared to aftermarket alternatives.

b. Installation Complexity: The process of installing a crankcase breather can be more involved than some other motorcycle maintenance tasks, requiring patience and attention to detail to ensure proper installation.

The decision to buy a 16-b1 Crankcase Breather (4300150) for your Harley Big Twin pre-93 depends on your priorities as a motorcycle owner. If you value the peace of mind that comes with using an OEM part and the potential benefits of improved engine performance, then the investment is worthwhile. However, if cost and installation complexity are major concerns, you might consider exploring aftermarket alternatives.

Based on the information provided, it is recommended to consider the benefits and drawbacks of purchasing a OEM 16-b1 Crankcase Breather (4300150) for your Harley Big Twin pre-93. If you prioritize the assurance of a perfect fit and potential engine performance enhancements, this part is a sound investment. However, if budget and installation complexity are significant concerns, you may want to explore aftermarket alternatives while still ensuring compatibility with your engine model.

Details:

Originally retailed for significantly more, now offered at a great value. Built with a durable metal housing and integrated breather filter, it helps manage crankcase pressure while maintaining proper engine ventilation. This J Cycles crankcase breather assembly is a quality replacement part designed for Harley-Davidson Big Twin engines manufactured prior to 1993. Ideal for restoration projects, maintenance, or replacement of worn factory components, this breather assembly comes new in original packaging and is ready installation.

Condition: New, unused, and unopened. A trusted aftermarket solution from a well-known motorcycle parts manufacturer. MEASUREMENTS / FITMENT: designed to fit Harley-Davidson Big Twin engines manufactured before 1993 .Please verify fitment using the part number prior purchase. SPECIFICATIONS: Brand: J Cycles Part Type: Crankcase Breather Assembly Number: 4300150 Compatibility: Harley-Davidson Big Twin engines Fitment: Pre 1993 model's Material: Metal housing with breather filter condition: New, sealed in original packaging.

Packaging may show minor shelf wear.

part #: 16b1 price

• $21.95

specifications scoofilters:

• for models: Twin
• for makes: Harley
• brand: J-p Cycles
• mpn: 16-b1
• type: Air Filter
• machine type: Street Motorcycle
• oe/oem part number: 4300150
• items included: Crankcase Breather Assembly
• material: Metal
• country of origin: United States

shipping scoofilters:

• transit: 5-11 Days
• service: USPS Ground Advantage
• cost: $8.46
• type: Calculated
• class: Standard
• carrier: USPS

offer scoofilters:

• options: Ship-to-home
• started: March 20, 2026
• sold: 0
• best offers: True
• availability: In Stock
• quantity: 1

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seller scoofilters:

• city: Concord, California
• rating: 100.0%
• # reviews: 236

returns scoofilters:

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

general scoofilters:

• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Air Filters
• condition: New