Harley Davidson Motorcycle Engine Vents
- Kuryakyn®Bluegrass Breather KitBluegrass Breather Kit by Kuryakyn®. Unfortunately, almost all Harley-Davidson engines that vent the crankcase through the cylinder heads also expel oil through the same passages. Venting directly into the air cleaner, especially a...Not Available for Sale in the State of CaliforniaThoroughly developed for unbeatable quality and enduring value$74.69
- Kuryakyn®Breather BoltBreather Bolt by Kuryakyn®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Thoroughly developed for unbeatable quality and enduring valueMade with experience and proven by quality$11.69 - $13.49
- Kuryakyn®Rubber BootsRubber Boots by Kuryakyn®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials...Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance$8.09 - $11.69
- Biker's Choice®Crankcase Breathers Replacement Filter (74065A)Crankcase Breathers Replacement Filter by Biker's Choice®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance$14.09
- Kuryakyn®1 1/4" Breather Bolt (9975)1 1/4" Breather Bolt (9975) by Kuryakyn®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Thoroughly developed for unbeatable quality and enduring valueMade with experience and proven by quality$12.56
- Kuryakyn®Long Leg Bluegrass Breather Kit (9930)Long Leg Bluegrass Breather Kit (9930) by Kuryakyn®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance$74.69
- Kuryakyn®Rubber Boots (9900)Rubber Boots (9900) by Kuryakyn®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance$8.09
- Kuryakyn®Short Leg Bluegrass Breather Kit (9932)Short Leg Bluegrass Breather Kit (9932) by Kuryakyn®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance$74.69
- Kuryakyn®TC Style Breather Bolt (9927)TC Style Breather Bolt by Kuryakyn®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Thoroughly developed for unbeatable quality and enduring valueMade with experience and proven by quality$11.69
- Biker's Choice®Breather Bolt KitBreather Bolt Kit by Biker's Choice®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Designed to provide unrivaled value and maximum reliabilityExpertly crafted from the highest grade materials$15.00 - $20.43
- Biker's Choice®Breather KitBreather Kit by Biker's Choice®. Includes breather bolts, washers and hardware. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of...One-piece chrome tube designIncludes breather bolts, washers and hardware$45.38
- Biker's Choice®Crankcase BreatherCrankcase Breather by Biker's Choice®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance$12.03 - $17.87
- HardDrive®Breather KitBreather Kit by HardDrive®. Use these brackets and breather kits when installing an aftermarket air cleaner. If a custom breather system is used, some support brackets are available without the breather system.Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials$117.86 - $201.56
- JIMS®Breather Valve GearBreather Valve Gear by JIMS®. Made in the USA from aerospace grade steel, this is another quality JIMS® product. Use JIMS® Breather Hole Reamer Tool. A damaged breather hole used to be a costly problem, now it is not....Unique design to meet your tastes and preferencesManufactured to deliver incredible quality$119.12
- S&S Cycle®Breather Conversion KitBreather Conversion Kit by S&S Cycle®. Improved breather hardware for Super E & G air cleaner kits. Banjo fittings are sealed with silicone coated washers instead of O-rings. The washers are much more durable and seal better to...Precise engineering ensures the latest in qualityExpertly manufactured from highly reliable materials$44.96 - $64.95
- S&S Cycle®Breather GearBreather Gear by S&S Cycle®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Precise engineering ensures the latest in qualityExpertly manufactured from highly reliable materials$110.95 - $152.95
- S&S Cycle®Crankcase Breather Reed ValveCrankcase Breather Reed Valve by S&S Cycle®. Consists of three steel reeds that are normally in the closed position. When pistons travel downward in the cylinders, the air in the crankcase is compressed and pressure in the crankcase...Easy-to-install when changing cams or servicing oil pumpPrecise engineering ensures the latest in quality$144.95 - $160.95
- Biker's Choice®Breather Bolt Kit (120230)Breather Bolt Kit by Biker's Choice®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Designed to provide unrivaled value and maximum reliabilityExpertly crafted from the highest grade materials$20.43
- Biker's Choice®Breather Bolt Kit (120231)Breather Bolt Kit by Biker's Choice®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Designed to provide unrivaled value and maximum reliabilityExpertly crafted from the highest grade materials$15.00
- Biker's Choice®Breather Kit (120166)Breather Kit by Biker's Choice®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...One-piece chrome tube designIncludes breather bolts, washers and hardware$45.38
- Biker's Choice®Crankcase Breather (120094)Crankcase Breather (120094) by Biker's Choice®. With Bolt. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance$12.03
- Biker's Choice®Crankcase Breather (74065S2)Crankcase Breather (74065S2) by Biker's Choice®. With Chrome Cap. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance$17.87
- HardDrive®Bracket with Bolts and Breather Tube (120238)Bracket with Bolts and Breather Tube (120238) by HardDrive®. Use these brackets and breather kits when installing an aftermarket air cleaner. If a custom breather system is used, some support brackets are available without the breather...Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials$76.46
- HardDrive®Bracket with Bolts and Breather Tube (120117)Bracket with Bolts and Breather Tube (120117) by HardDrive®. Use these brackets and breather kits when installing an aftermarket air cleaner. If a custom breather system is used, some support brackets are available without the breather...Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials$62.06
- HardDrive®Breather Kit (120427)Breather Kit (120427) by HardDrive®. Use these brackets and breather kits when installing an aftermarket air cleaner. If a custom breather system is used, some support brackets are available without the breather system.Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials$201.56
- HardDrive®Breather Kit (120428)Breather Kit (120428) by HardDrive®. Use these brackets and breather kits when installing an aftermarket air cleaner. If a custom breather system is used, some support brackets are available without the breather system.Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials$201.56
- HardDrive®Breather Kit (120426)Breather Kit (120426) by HardDrive®. Use these brackets and breather kits when installing an aftermarket air cleaner. If a custom breather system is used, some support brackets are available without the breather system.Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials$117.86
- HardDrive®Breather Kit (120425)Breather Kit (120425) by HardDrive®. Use these brackets and breather kits when installing an aftermarket air cleaner. If a custom breather system is used, some support brackets are available without the breather system.Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials$117.86
- Hayden Enterprises®Crank Vent Plus Crankcase Venting System (KVP)Crank Vent Plus Crankcase Venting System by Hayden Enterprises®. More than simply venting your crankcase fumes, the Krank Vent Plus controls the air under the pistons by maintaining the proper amount of vacuum in the crankcase at any...Made in USAThoroughly developed for unbeatable quality and enduring value$128.38
- JIMS®Steel Breather Valve Gear (2337S)Steel Breather Valve Gear by JIMS®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance$119.12
Four-stroke engines need ventilation. As soon as they are cranked, the working temperature is still low, creating combustion byproducts and condensation within the crankcase. Engine vents allow the circulation of air and keep the engine clean. But there is another reason for their use related to the construction of motors. Atmospheric pressure and a small percentage of combustion gases reach the crankcase even in the most perfect motors, creating a dangerous internal pressure that could cause all the seals to break. Vents and breathers are designed to maintain the pressure in the crankcase within the set limits.
In large motors, such as those installed in Harley Davidson bikes, most extra pressure is caused by the phenomenon known as blowby and by malfunctioning pistons. When they are worn out or not placed properly, they cause damage to the piston rings, which can no longer seal the combustion chamber. Breathers and vents trap fuel vapors and water preventing the pressure in the crankcase from reaching an alarming level. Browse our online store to find a large selection of Harley Davidson motorcycle engine vents and related components, including bolts, filters, and fittings.
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