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Best Transmission Oil For Harley 6 Speed (2024 Updated)

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When looking for transmission oil for your Harley 6 speed, there are five key points to consider. Firstly, you should look for a high-quality oil that meets the specifications outlined by Harley-Davidson. Secondly, you should consider the viscosity of the oil as this will affect how it performs in different conditions. Thirdly, you should consider the type of oil and whether it is suitable for the type of riding you plan to do. Fourthly, you should look for an oil that has been specially formulated for Harley-Davidson 6 speed transmissions. Finally, you should check the manufacturer’s instructions to ensure you are using the correct oil for your bike.

Choosing the right transmission oil for your Harley 6 speed is essential for ensuring the smooth running of your engine and maintaining your bike’s performance. It is important to select a high-quality oil that meets the specifications outlined by Harley-Davidson. The viscosity of the oil is also important as this will affect how it performs in different conditions. You should also consider the type of oil and whether it is suitable for the type of riding you plan to do. There are various types of transmission oils available, so it is important to select one that has been specially formulated for Harley-Davidson 6 speed transmissions. Finally, you should check the manufacturer’s instructions to ensure you are using the correct oil for your bike.

By following these five key points, you can be sure you are selecting the best transmission oil for your Harley 6 speed. This will help you to maintain your bike’s performance and ensure the smooth running of your engine. With the right oil, you can be sure your Harley 6 speed will be running at its best.

10 Best Transmission Oil For Harley 6 Speed

1. Jims Machining 6-Speed Transmission Rebuild Kit

The Jims Machining 6-Speed Transmission Rebuild Kit is perfect for those looking to completely overhaul their 6-speed transmission. This comprehensive kit includes all the parts and tools necessary for a successful rebuild, including gaskets, seals, locks, and bearings. All of the components are made in the USA and designed to be of the highest quality.

The rebuild kit comes complete with detailed instructions and diagrams to ensure proper installation. The rebuild kit can be used to refurbish a worn out or damaged transmission, or to upgrade an existing transmission to a 6-speed setup. The kit includes all the pieces necessary to build a 6-speed transmission from the ground up, including all the necessary parts to construct the transmission case, the gears, and the shift forks.

The kit also includes the necessary seals and gaskets to ensure the transmission is properly sealed and will not leak. The included gaskets are made from high-grade materials and are designed to last for the life of the transmission. The seals and locks included in the kit are also of the highest quality and will ensure a leak-free transmission for years to come.

The included bearings are designed to reduce friction and improve overall performance of the transmission. The kit also includes all the necessary hardware for installation, including screws, washers, and nuts.

The Jims Machining 6-Speed Transmission Rebuild Kit is perfect for those looking to completely overhaul their 6-speed transmission. With high-quality components and detailed instructions, the kit offers an easy and efficient solution for those looking to rebuild their transmission or upgrade to a 6-speed setup.

2. Red Line Red42804 V-Twin Transmission Oil, 1 Quart, 1 Pack

Red Line V-Twin Transmission Oil is a top-of-the-line product designed for high-revving, four-stroke motocross bikes and ATVs. This oil offers cutting edge, shockproof technology and is specifically engineered to reduce transmission noise and provide smoother shifting. With its improved performance, it dramatically reduces temperature and increases oil films between gear teeth. It also resists throw-off and will keep your transmission running better for longer.

Red Line has been established since 1979 and has since built a reputation for providing high-quality products that perform and protect better than any competitors on the market. This V-Twin Transmission Oil is no different and is sure to keep your transmission running quieter and smoother than ever before. This oil is also vehicle specific and has been designed to fit perfectly with your motocross bike or ATV.

If you are looking for a high-performance transmission oil that will not only keep your engine running better for longer but also reduce noise and provide smoother shifting, then Red Line V-Twin Transmission Oil is the perfect option for you. With its cutting edge technology, this oil will make a big impact against big impacts and keep your transmission running as smoothly and quietly as possible.

3. Maxima Racing Oils 40-01901 85w140 V-Twin Transmission/gear Oil – 32 Fl. Oz.

Maxima Racing Oils 40-01901 85w140 V-Twin Transmission/Gear Oil has been specially designed to deliver exceptional protection and performance for V-Twin motorcycles. This specially formulated oil is made from high-quality mineral base oil, which provides superior protection and performance for motorcycle transmissions and gears. It is designed to reduce wear on the internal parts and to help improve the overall performance of the motorcycle.

The oil helps to provide maximum protection for the transmission and gears, ensuring long-term performance and reliability. It is formulated to reduce noise and vibration, while providing a smoother and quieter ride. The oil also helps to reduce friction and heat buildup, helping to extend the life of the transmission and gears.

Maxima Racing Oils 40-01901 85w140 V-Twin Transmission/Gear Oil is formulated to provide superior protection against wear and tear, helping to extend the life of the motorcycle. The oil also helps to deliver better fuel economy and improved acceleration, due to its superior lubrication properties. The oil helps to reduce engine wear, helping to reduce the need for frequent oil changes.

The oil is also formulated to resist oxidation and thermal breakdown, helping to extend the life of the engine. It also helps to reduce the formation of deposits, helping to improve the overall performance of the motorcycle. The oil is also compatible with all types of V-Twin engines and transmission systems.

Maxima Racing Oils 40-01901 85w140 V-Twin Transmission/Gear Oil is available in 32 fl. oz. bottles and comes with a manufacturer’s warranty. This oil is ideal for use in V-Twin motorcycles and is designed to provide superior protection and performance for your machine.

4. Harley/ultima 5/6-Speed Shifter Pawl Gasket Seal Rebuild Kit

This comprehensive Transmission Shifter Pawl Gasket Seal Rebuild Kit is compatible with Harley and Ultima 5 & 6-Speed Models. This kit contains all the necessary components to rebuild and restore your transmission, including a top cover gasket (#78-461A), clutch release cover gasket (#78-455A), trap door gasket (#78-452A), Main Shaft Seal (#95-791), quad seal (#95-717), and oil shifter seal (#95-787).

This kit is designed to ensure your transmission is up to the highest standards, making sure you have a reliable and secure ride. With the help of this kit, you can rest assured that your transmission will be as good as new. If a problem arises, our customer service team is always available to help you out.

This Transmission Shifter Pawl Gasket Seal Rebuild Kit is an excellent choice for those who want to restore their transmission to optimal condition. All parts are quality checked, and we advise customers to double-check their model serial numbers to ensure they are purchasing the correct kit. With this kit, you can guarantee your transmission will be running smoothly and safely.

5. Maxima Racing Oils 40-02901 80w90 V-Twin Transmission/gear Oil – 32 Fl. Oz.

Maxima Racing Oils 40-02901 80w90 V-Twin Transmission/Gear Oil is a superior, mineral based oil designed to provide superb protection and performance in motorcycle transmissions. It is ideal for use in 4-, 5- and 6-speed high performance gear boxes and provides high film strength, allowing gear shifts to remain smooth even under the most intensive loads and RPMs. This oil is specially formulated with extreme pressure additives, as well as surface active chemistry, to protect gears from wear, deposits and ensure trouble-free operation.

Maxima Racing Oils V-Twin Heavy-Duty Transmission & Gear Oil is an excellent choice for protecting your motorcycle's gearbox and ensuring smooth, reliable operation. It is designed to reduce viscosity loss and wear, while also providing superior protection against shock loads. The oil's ultra-clean detergents will help keep your gearbox clean and free of deposits, allowing it to run more efficiently and smoothly.

Whether you're a professional racer or an amateur enthusiast, Maxima Racing Oils 40-02901 80w90 V-Twin Transmission/Gear Oil is the perfect choice for protecting your gearbox and ensuring smooth, reliable performance. Its superior-quality mineral-based formula will help keep your bike's transmission running smoothly, even under the most intense loads. Plus, its ultra-clean detergents will help keep your gearbox free of deposits, allowing for trouble-free operation. So, if you're looking for a gear oil that provides superior protection and performance, look no further than Maxima Racing Oils 40-02901 80w90 V-Twin Transmission/Gear Oil.

6. Transmission Gasket/seal Rebuild Kit For Harley And Ultima 5 & 6-Speed Models

This Transmission Gasket/Seal Rebuild Kit from JINFANNIBI is the perfect choice for Harley and Ultima 5 & 6-Speed Models. Made from 100% high quality rubber, this kit is designed for maximum pressure resistance and reliability. The kit includes an oil cover gasket (#78-461A), clutch release cover gasket (#78-455A), trap door gasket (#78-452A), main shaft seal (#95-791), quad seal (#95-717) and oil shifter seal (#95-787). All of these parts are presented with JINFANNIBI's signature box packaging and are backed by a 1-year warranty. Restoring your motorcycle's transmission to its original condition has never been easier.

For the ultimate in reliability, trust JINFANNIBI's Transmission Gasket/Seal Rebuild Kit for Harley and Ultima 5 & 6-Speed Models. With its high quality materials and professional packaging, this kit is sure to provide you with the results you need. Plus, with its 1-year warranty, you can be sure you're getting a quality product that will stand the test of time. So, don't wait any longer; get your Transmission Gasket/Seal Rebuild Kit from JINFANNIBI today and start restoring your motorcycle's transmission to its original condition.

7. 50 Pack – #11105 O-Ring Replacement For Harley Davidson Oil Drain Plug Oring (Orange Color)

This 50 Pack of Orange Harley Davidson 11105 O-Rings is a must-have for any motorcycle enthusiast. These top quality OEM material replacement parts serve as a direct replacement for your existing oil drain plug o-ring.

An oil change is an important part of regular maintenance for any motorcycle and replacing the o-ring during each oil change can help prevent leaks. This product stands out with its signature orange color that is molded throughout the o-ring, not just a surface coating.

Harley Davidson is known for its superior quality and durability, and this product is no exception. Manufactured and warrantied by Captain O-Ring LLC, you can rest assured that your bike will be in excellent condition.

These O-rings are designed to be easy to install, and with the 50 pack you will have plenty to last you for a long time. With their superior quality and superior color, these O-rings will not only keep your bike running in tip-top shape, but they will also look great on your bike.

If you're looking for a reliable and durable O-ring replacement for your Harley Davidson Oil Drain Plug, then this 50 Pack of Orange Harley Davidson 11105 O-Rings is the perfect solution. With superior quality OEM material and the signature orange color, you can rest assured that your bike will remain safe and secure.

8. Carbpro Transmission Gasket/seal Rebuild Kit For Harley And Ultima 5 & 6-Speed Models

The Carbpro Transmission Gasket/Seal Rebuild Kit for Harley and Ultima 5 & 6-Speed Models is a high quality, brand new product that is perfect for restoring your bike’s transmission. This kit includes a top cover gasket (78-461A), a clutch release cover gasket (78-455A), a trap door gasket (78-452A), a main shaft seal (95-791), a quad seal (95-717), and an oil shifter seal (95-787). All of these parts are essential for transmission maintenance, so it’s important to make sure you have the right ones.

The Carbpro Transmission Gasket/Seal Rebuild Kit is designed to provide you with all the necessary components to properly rebuild your transmission. The gaskets and seals are made from high-quality materials that are designed to last, ensuring that your bike runs smoothly for years to come. The kit also includes detailed instructions so you can easily put the pieces together and get your bike back up and running in no time.

In addition, each product in the Carbpro Transmission Gasket/Seal Rebuild Kit has undergone a strict inspection process to ensure that it meets the highest standards. However, mistakes can happen, so it is important to inspect the parts carefully before installation. If any issues arise once you have received the kit, please contact us and we will do our best to help you resolve the problem.

The Carbpro Transmission Gasket/Seal Rebuild Kit is an excellent product that provides you with everything you need to restore your transmission. With its quality parts and easy-to-follow instructions, you can have your bike back on the road in no time.

Best Transmission Oil For Harley 6 Speed FAQs

Can I use 20 50 oil in my Harley transmission?

Yes, 20W50 oil can be used in a Harley transmission. It is recommended to use a motorcycle-specific oil such as Harley-Davidson Syn3 20W50 in your Harley transmission as it provides superior lubrication and protection for your transmission. 20W50 motor oil is thicker than other motor oils and it can provide better protection in extreme temperatures, which is beneficial for Harley transmissions. It is also important to use an oil that is designed for motorcycles, as they are formulated to protect against the extreme conditions that are common with a Harley engine. Additionally, 20W50 oil can help reduce engine vibration and help reduce wear on engine and transmission components.

Can you use 75w90 in Harley transmission?

Yes, 75w90 can be used in Harley transmissions as it is an appropriate viscosity grade for motorcycles. This type of oil is specifically designed to reduce drag and wear on gears, which is important in a Harley transmission that typically has higher torque and operating speeds. Additionally, 75w90 oil is designed to handle extreme temperatures, which is beneficial in Harley transmissions that must operate in both cold and hot climates. The oil also contains additives that protect the transmission from corrosion and oxidation, which is beneficial in a Harley transmission that can be exposed to a lot of moisture and humidity. Ultimately, 75w90 is an excellent choice for Harley transmissions due to its ability to reduce drag, wear, and corrosion while providing protection against extreme temperatures.

How much oil does a 6 speed Harley transmission take?

The exact amount of oil needed for a 6 speed Harley transmission will depend on the model and year of the motorcycle, as well as the type of oil used. Generally, Harley-Davidson recommends between 1.8 and 2.2 quarts of oil for most 6 speed transmissions. However, it is important to refer to the owner’s manual for the exact amount of oil needed for the specific model and year. Additionally, it is important to use the recommended oil viscosity for the transmission. Harley-Davidson recommends using a 10W-40 or 20W-50 motor oil for most 6 speed transmissions. If a different oil viscosity is used, it may cause excessive wear and damage to the transmission.

What oil goes in a Harley transmission?

The type of oil to be used in a Harley-Davidson transmission depends on the model and year of the bike. Generally, the recommended oil for Harley-Davidson transmissions is 20W50 motor oil with the API service designation "SH" or higher. It is important to note that many Harley-Davidson models require the use of a synthetic oil, such as AMSOIL Synthetic 20W-50 Motorcycle Oil. It is important to read the owner’s manual to determine the type of oil that is recommended for the specific model of Harley-Davidson motorcycle. It is also important to use the right amount of oil in the transmission in order to ensure proper lubrication and performance.

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