Advanced multi-functional formula for both domestic and foreign motorcycles. Excellent in air-cooled motorcycle engines due to high heat resistance. Can be used in engines, transmissions and the primary chaincase. Not recommended where an API GL-4 or GL-5 gear oil is required.
AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil is a premium oil designed for those who demand the absolute best lubrication for their motorcycles. It is the result of extensive research and is specially formulated to excel in all areas unique to motorcycles, including the high temperatures of air-cooled engines such as Harley-Davidson* V-twins, wet-clutch lubrication, extreme-pressure regions of gears and chains and rust common to short trips and storage. AMSOIL Synthetic V-Twin Motorcycle Oil is multi-functional and fulfills the requirements of both domestic and foreign motorcycles.
AMSOIL Synthetic V-Twin Motorcycle Oil contains a heavy treatment of anti-wear additives to reduce wear regardless of the operating conditions. It is thermally (heat) stable and contains maximum levels of oxidation inhibitor additives. After 250 hours (13,647 miles) on an engine dyno, AMSOIL Synthetic V-Twin Motorcycle Oil eliminated piston scuffing and wear for long engine life and maximum power.
AMSOIL Synthetic V-Twin Motorcycle Oil is a premium oil designed for those who demand the absolute best lubrication for their motorcycles.It is the result of extensive research and is specially formulated to excel in all areas unique to motorcycles, including the high temperatures of air-cooled engines, wet-clutch lubrication, extreme-pressure regions of gears and chains, and rust protection.
AMSOIL 15W-60 and 20W-40 Synthetic V-Twin Motorcycle Oil provides Indian and Victory riders the confidence and security that comes with receiving maximum protection and performance for their bikes. It presents a premium alternative to higher-priced manufacturer-branded oils.
AMSOIL Synthetic V-Twin Motorcycle Oil is a premium oil designed for those who demand the absolute best lubrication for their motorcycles.It is the result of extensive research and is specially formulated to excel in all areas unique to motorcycles, including the high temperatures of air-cooled engines, wet-clutch lubrication, extreme-pressure regions of gears and chains, and rust protection.
Provides Anti-Wear Protection for Gears and Chains
AMSOIL Synthetic V-Twin Motorcycle Oil is shear stable and resists thinning from mechanical activity. It performs like a gear lube without the negative effects of extreme-pressure additives, such as poor wet-clutch performance.
The AMSOIL V-Twin Oil Change Kit (HDCK) combines everything needed to perform an AMSOIL oil change on most 1999-2016 Harley-Davidson* motorcycles in one convenient package.
The AMSOIL V-Twin Oil Change Kit includes the following:
* Harley-Davidson owns the trademark rights to Harley-Davidson and the motorcycle models listed. No affiliation or endorsement claim, express or implied, is made by their use.
Oil Filter Wrench GA251 ( fits the filter EaOM134C)
AMSOIL SAE 60 Synthetic V-Twin Motorcycle Oil is a premium oil designed for those who demand the absolute best lubrication for their motorcycles. AMSOIL Synthetic Motorcycle Oil is the result of extensive research, and it is specially formulated to excel in all areas unique to motorcycles, including high engine rpm, wet-clutch lubrication, extreme-pressure regions of gears and rust common to short drives and storage. SAE 60 Synthetic V-Twin Motorcycle Oil features superior heat resistance and wear protection. It is shear-stable and helps maintain proper oil pressure in elevated temperatures. It stops viscosity breakdown (loss), protects gears and chains, and meets SAE 140, API GL-1 gear oil requirements. It is multi-functional and fulfills the requirements of both domestic and foreign motorcycles. SAE 60 Synthetic V-Twin Motorcycle Oil outperforms other conventional and synthetic motorcycle oils.
AMSOIL V-Twin Synthetic Transmission Fluid is specifically designed for bikers who prefer a dedicated transmission fluid over a multi-use lubricant. Its frictional properties deliver smooth shifts and it helps quiet transmission noise, letting riders focus on enjoying the ride. V-Twin Synthetic Transmission Fluid is Warranty Secure™ and will not void your motorcycle’s warranty. It is a cost-effective, high-performance alternative to original equipment manufacturer (OEM) fluids.
AMSOIL V-Twin Synthetic Primary Fluid is purpose-built for bikers who prefer a dedicated primary chaincase lubricant. Its balanced formulation delivers consistent clutch feel for confident takeoffs, helping riders avoid killing the engine. It also protects components against wear to help riders get the most out of their bikes. V-Twin Synthetic Primary Fluid is Warranty Secure™ and will not void your motorcycle's warranty. It is a cost-effective, high-performance alternative to original equipment manufacturer (OEM) fluids.
Synthetic Metric Amsoil Motorcycle Oil is designed for metric bike owners who demand the absolute best lubrication for their motorcycles. Whether riding aggressively, cruising or in stop-and-go traffic, AMSOIL Synthetic Metric Motorcycle Oil delivers the benefits most important to riders, including premium wear protection; smooth, confident shifts and cool, clean performance. With AMSOIL Synthetic Metric Motorcycle Oil, riders enjoy the confidence and security that comes with providing their bikes maximum protection and performance. It is Warranty Secure™ and will not void your motorcycle's warranty.
AMSOIL Synthetic Metric Motorcycle Oil is designed for metric bike owners who demand the absolute best lubrication for their motorcycles. Whether riding aggressively, cruising or in stop-and-go traffic, AMSOIL Synthetic Metric Motorcycle Oil delivers the benefits most important to riders, including premium wear protection; smooth, confident shifts and cool, clean performance. With AMSOIL Synthetic Metric Motorcycle Oil, riders enjoy the confidence and security that comes with providing their bikes maximum protection and performance. It is Warranty Secure™ and will not void your motorcycle's warranty.
AMSOIL Synthetic Metric Motorcycle Oil is designed for metric bike owners who demand the absolute best lubrication for their motorcycles. Whether riding aggressively, cruising or in stop-and-go traffic, AMSOIL Synthetic Metric Motorcycle Oil delivers the benefits most important to riders, including premium wear protection; smooth, confident shifts and cool, clean performance. With AMSOIL Synthetic Metric Motorcycle Oil, riders enjoy the confidence and security that comes with providing their bikes maximum protection and performance. It is Warranty Secure™ and will not void your motorcycle's warranty.
AMSOIL INC., the premier manufacturer of synthetic motorcycle lubricants, focuses on improving lubricant performance so riders can focus on improving their performance on the trail or track. That's why AMSOIL is the Official Oil of Monster Energy Supercross, AMSOIL Arenacross and the AMSOIL GNCC.
Engineered to deliver the performance attributes most requested by on- and off-track dirt bike riders, including consistent clutch feel. Consistent clutch feel is the result of “friction durability,” so whether deep into a race or deep in the woods, riders can feel confident their clutch will perform from start to finish. AMSOIL-exclusive advanced chemistry provides outstanding engine reliability for worry-free operation under severe conditions.
Delivers Confidence in Clutch Feel
AMSOIL Synthetic Dirt Bike Oil's superior friction-durability properties help minimize clutch slippage, fade and chatter, giving riders consistent clutch feel during takeoffs or when maneuvering around obstacles on the trail. In an extreme simulated-start test, AMSOIL Synthetic Dirt Bike Oil continued to deliver consistent clutch feel following 32 simulated race starts, while a leading original equipment manufacturer (OEM)-branded oil demonstrated inconsistent clutch-lever action and poor clutch feel after 16 starts. The clutch plates lubricated with AMSOIL Synthetic Dirt Bike Oil remained clean and in good overall condition, while the plates using the OEM oil revealed discoloration and wear. AMSOIL Synthetic Dirt Bike Oil’s superior performance helps instill in riders the confidence that their bikes will perform consistently in all types of riding conditions.
Protects Against Wear
AMSOIL Synthetic Dirt Bike Oil withstands high-rpm operation, extreme heat and mechanical shear. Its synthetic base oils naturally resist viscosity loss and provide a protective film against wear to gears, bearings and pistons. Its anti-wear additives provide an extra measure of protection, promoting long component life to help riders get the most out of their bikes.
RACING IS RESEARCH™
AMSOIL Synthetic Dirt Bike Oil underwent extensive on-track testing in the bikes of AMSOIL-sponsored professional riders on the GEICO/AMSOIL/Honda Factory Connection and Team Babbitt's racing teams. A combination of racer feedback and lab testing allowed AMSOIL to fine-tune AMSOIL Synthetic Dirt Bike Oil for outstanding wear protection and consistent clutch feel – benefits riders demand.
Most people who ask have an underlying question they really mean to ask: Can I use the same motor oil in my motorcycle, dirt bike and ATV/UTV?
Sure, you can use a single oil formulation for all your toys (assuming you use the correct viscosity in each). But you shouldn’t. Kind of like you can dump Filippo Berio Extra Virgin Olive Oil into your machines, but you shouldn’t.
Why? Because each application presents unique challenges to motor oil that one formulation can’t meet. We’ll break them all down to see why.
But first, let’s look at what the motor oil must do regardless of the application.
Whether in a Harley-Davidson, Kawasaki sport bike, UTV or dirt bike, the oil has to protect against wear and fight the damaging effects of extreme heat. These include deposit formation, which robs the engine of efficiency and power. It also includes “oxidation,” which is a ten-cent word that means chemical break down. The sooner the oil breaks down, the sooner it fails to guard against wear and deposits as well as it should. And the sooner it requires changing, wasting time and money.
That’s simple enough. And years ago it was possible to make one motor oil to protect all those applications. But today’s engines aren’t so simple.
Take your classic air-cooled V-twin, like the engine found in most Harley-Davidson motorcycles. These engines get hot. How hot? In our 2012 Harley-Davidson Street Bob we tested in our mechanical lab, we saw cylinder temperatures reach 383ºF (195ºC). In contrast, our liquid-cooled 2017 Indian Scout running the same test demonstrated cylinder temps on average of 200ºF (93ºC).
Heat that intense can wreak havoc on the motor oil. The oil can lose viscosity and thin out, effectively turning your 20W-50 into a 10W-40, or worse. A lighter viscosity than what the engine is designed to use can fail to protect parts against wear. Extreme heat also hastens chemical break down.
In fact, the rate of oxidation doubles for every 18ºF (10ºC) increase in oil temperature. That means for every 18ºF increase in temperature, oil life is cut in half.
It’s vital that the oil meant for your air-cooled V-twin is formulated to withstand such intense heat. To accomplish that, we formulate AMSOIL Synthetic V-Twin Motorcycle Oil with added resistance to extreme heat. Its naturally heat-resistant synthetic base oils maintain viscosity despite extreme heat and the shearing force of transmission gears “cutting” the oil’s molecular structure. That translates into reliable protection in the toughest riding conditions.
What about a metric sport bike? Can’t be much different than a V-twin, can it?
In this case, foam is one of our biggest enemies. A metric bike can easily surpass 10,000 rpm. The mechanical action of the crankshaft spinning that fast can whip air into the oil, causing foam.
If the oil isn’t formulated with fast air-release properties, foam bubbles will travel throughout the engine. When they collapse between meshing gears or bearing surfaces, nothing is left behind to provide protection except air.
We all need air, but it’s worthless at protecting high-performance engines against wear.
That’s why we formulate AMSOIL Synthetic Metric Motorcycle Oil specifically to resist foam. Its anti-foam additives weaken the surface tension of air bubbles, helping eliminate foam. This results in excellent wear protection no matter how heavy you lay into the throttle.
Your ATV/UTV is a whole different animal. Here, oil film strength takes on additional importance. That’s because these units are frequently used to perform heavy work at slow speeds.
My Honda Rancher ATV offers the perfect example. It goes days and even weeks without getting out of first or second gear. I pull a trailer loaded with firewood quite a but. I also pile the racks with a couple chainsaws, splitting maul, pry bar, gas cans and the other accoutrements of a fine time spent in the woods.
Slow, methodic operation when heavily loaded places increased stress on the engine bearings. If the oil’s film strength can’t hack it, the increased pressure will rupture the oil film, allowing the bearings to wear out.
AMSOIL Synthetic ATV/UTV Motor Oil is engineered with robust synthetic base oils that allow formation of a durable protective film in the toughest conditions.
You might think, “Sure, but my Harley runs hard, too.” True, but motorcycles are typically ridden recreationally, meaning they undergo increased stress when accelerating, but level out so to speak once you reach cruising speed. Riding at a consistent speed under light load creates less stress than, for example, pulling a stump out of the ground with your UTV or pulling a loaded trailer uphill through the mud with your ATV.
Finally, we have dirt bikes. Surprisingly, dirt bike operating conditions are similar to those of an ATV or UTV. True, you don’t plow snow with your Honda CRF450. But the bike similarly undergoes low-speed stress punctuated with periods of high revving.
In a race, you’re heavy on the throttle out of the gate. Then you back off into the first corner. You’re on the throttle through the whoops, causing the rear tire to spin freely when it’s in the air, but create a heavy load on the engine when it contacts the ground.
Where dirt bikes differ, however, is in engine design.
Dirt bike engines are typically lightweight designs meant for performance. Any time you remove mass, yet increase power, you increase engine stress. The combination of high rpm and lighter materials creates the perfect scenario for engine failure should the motor oil fail to do its job. Plus, dirt bike pistons tend to have shorter piston skirts to reduce friction. That may help your lap time, but it doesn’t help engine longevity. The shorter piston wants to rock inside the cylinder, which concentrates tremendous force on the tiny area where the piston skirt and cylinder wall contact. Only a microscopic oil film provides protection in this area, meaning the oil had better offer the film strength needed to help the engine survive. the shown picture shows the piston cracked after more than 100 hours of use. Wear likely shrunk the piston and caused it to rock back and forth in the cylinder. The continual hammering action finally caused it to fail.
Making matters worse, dirt bikes barely hold any oil. Roughly one quart is common. Think about everything that single quart of oil must do:
That’s why most riders change motor oil frequently. Rebuilding the top-end every 15 hours or so isn’t uncommon, either.
But just because dirt bike oil is changed frequently, don’t think you can use a cheap oil. It’s far less expensive and less hassle to pay a little more up front for a good oil than it is to rebuild your top-end.
The moral of the story is this: the days of using one motor oil for all your toys is over. Each application creates unique challenges that are best suited for a tailor-made motor oil formulation.
Check out the image to see what can happen. This piston cracked after more than 100 hours of use. Wear likely shrunk the piston and caused it to rock back and forth in the cylinder. The continual hammering action finally caused it to fail.
High stress combined with its lightweight design caused this dirt bike piston to fail.
Making matters worse, dirt bikes barely hold any oil. Roughly one quart is common. Think about everything that single quart of oil must do:
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