Location. Central Arkansastan. May 25, 2011. #2. Mobil One V-Twin 20W-50, Valvoline RACING 20W-50, or Valvoline 20W-50 4-stroke MC oil for the crankcase. Some will chime in for Amsoil as well. HD formula+, Spectro Chaincase or even the above oils for the Tranny. Gear oil can also be used if its GL1 rated NOT gl5. Description. Oil dipstick for a HD Sportster XL 30X1.5 mm. There is a meter with which you can read the oil temperature. Prevent damage to the engine by stopping in time if it threatens to become too hot. See below which engines this type fits. This is the product. Place the product in your cart! Transmission I use a 85-140 fully synth Gear oil. Smooth as silk gear changes and protects the gears very well. Other holes I use a 20W-60 fully synth. Primary oil is only there to lube the chain drive, cool the clutch and wash any wear particles to the bottom of the case to get them out of the way until the next change. Oil Return Line (BLUE) 3/8″ ID oil line which runs to the connection on the back of the oil tank. Vent Line (RED) 1/4″ ID oil line which runs from the case to the connection on the top of the oil tank. The image below is the back of the oil tank and shows where the oil lines connect to the tank. That big line coming off the tank is the oil Harley Davidson Motorbikes: Engine Fluid Capacity: Transmission Fluid Capacity: Fork Fluid Capacity: Harley Davidson Sportster: 3.5 Quarts: 1 Quart: 9-12 Ounces: Harley Davidson Road King: 3.5-4 Quarts: 24 Ounces: 9-12 Ounces: Harley Davidson Softail 1 Quart: 20-28 Ounces: 9-10 Ounces: Harley Davidson Dyna Wide Glide: 3 Quarts: 24-28 Ounces: 9 If your local dealer is like mine, the 10,000 mile scheduled maintenance on a Harley Davidson Sportster will cost just under $300.00. For $40.00 and a little of your time, the scheduled maintenance on your Sportster will leave you with plenty of extra money for accessories! Sportster Oil Drain Plug Recommended Harley Engine Oils And you need a refill for it. Alternatively, dry represents taking the forks to bits and cleaning them dry from inside to outside. You can see that dry forks require 0.5-1.0 oz—more than wet forks. Harley’s 49mm fork oil capacity is more than 24 fl. ounces. Also, Harley’s 41mm fork oil capacity is 11.8 ounces. Install the new primary oil filter and then screw on the primary oil drain plug. Next, use the funnel to add the quart of fresh primary oil into the primary oil tank. Once the oil has been added, start the engine and let it run for a few minutes. This will allow the oil to circulate throughout the engine. 5Gzy.