NOTICE
Do not switch lubricant brands indiscriminately because some lubricants interact chemically when mixed. Use of inferior lubricants can damage the engine. (00184a)
WARNING
Be sure that no lubricants or fluids get on tires, wheels or brakes when changing fluid. Traction can be adversely affected, which could result in loss of control of the motorcycle and death or serious injury. (00047d)
NOTE
The engine oil also lubricates the clutch and transmission.
Ride motorcycle for approximately 10 minutes to ensure the oil is hot and the engine is at normal operating temperature. Turn engine off.
  1. Place a suitable container under the motorcycle.
  2. See Maintenance and Lubrication → Checking Oil Level: Buell 1125R Models → Filler Plug. Unscrew and remove dipstick from oil fill hole. Replace o-ring if torn or damaged.
  3. See Figure 1. Remove the left engine oil drain plug located in the crankcase. Wipe any accumulated debris from magnetic tip on drain plug and replace the aluminum washer.
  4. See Figure 2. Remove the right oil drain plug located under the clutch cover. Wipe any accumulated debris from plug and replace the aluminum washer.
  5. After all oil has drained, tilt vehicle to right side to drain any remaining oil from the right side of engine.
1Crankcase oil drain plug
2Oil cartridge cover fasteners
Figure 1. Crankcase Oil Drain Plug (Left Side): Buell 1125R Models
Figure 2. Engine Oil Drain Plug (Right Side): Buell 1125R Models
NOTE
Refer to Maintenance Scheduling → Regular Service Intervals: Buell Models → Regular Service Intervals: 2008 Buell 1125R Models to determine if the oil filter cartridge needs to be replaced.
1. If replacing the oil filter cartridge, perform the following:
a. See Figure 1. Remove the two screws to detach the oil filter cover. Remove filter cartridge from cover.
b. Clean the cover and inside the oil filter recess in the crankcase. Remove any debris.
2. Install both drain plugs after oil is thoroughly drained.
a. Tighten left engine oil drain plug to 25 N·m (18 ft-lbs).
b. Tighten right engine oil drain plug to 15 N·m (11 ft-lbs).
3. Install new oil filter cartridge (Part No. Q0064.1AM), if removed.
a. Apply a light film of clean engine oil to the rubber contact surface on the new oil filter cartridge.
b. See Figure 3. Push new oil filter cartridge into cover until properly seated.
c. Install oil filter cover (with filter) onto crankcase with two screws. Tighten screws to 11 N·m (97 in-lbs).
4. Fill oil through filler (dipstick) hole using recommended oil from Maintenance and Lubrication → Engine Lubrication: Buell 1125R Models → Recommended Engine Oils. Always verify proper hot oil level on dipstick. Do not overfill.
a. Oil capacity with filter change is approximately 2.8 L (3.0 qt).
b. Oil capacity without filter change is approximately 2.4 L (2.5 qt).
5. Install (screw in) dipstick into oil fill hole. Make sure dipstick is screwed in completely.
NOTE
For ease of installation, apply a light film of clean engine oil to the dipstick o-ring.
WARNING
Compressed air can pierce the skin and flying debris from compressed air could cause serious eye injury. Wear safety glasses when working with compressed air. Never use your hand to check for air leaks or to determine air flow rates. (00061a)
6. Inspect oil cooler fins for debris or damage. Blow out any debris from fins with compressed air from the inside of the cooler.
7. Wipe up any spilled oil on vehicle.
8. Start engine. Verify that oil pressure signal lamp on instrument panel turns off after a few seconds when engine speed is 1000 RPM or above.
9. Check oil filter cover, drain plugs, hoses and oil cooler for leaks.
10. Check (hot) oil level. See Maintenance and Lubrication → Checking Oil Level: Buell 1125R Models.
Figure 3. Oil Filter Cartridge: Buell 1125R Models