1. Make sure the motorcycle is on a level surface.
2. Start the motorcycle and run it for a few minutes. The transmission fluid should be in the middle of the "Hot Full" and "Hot Add" marks on the sight glass on the left side of the transmission housing.
3. If the transmission fluid is below the "Hot Add" mark, add fluid through the transmission fill hole using a funnel until the level is correct.
Here are some additional tips for checking the transmission fluid on a 1999 Harley Road King:
- The transmission fluid should be checked regularly, especially before long rides.
- Always use the recommended type of transmission fluid for your motorcycle.
- Avoid overfilling the transmission, as this can cause engine damage.
- If you have any questions about checking the transmission fluid, consult your motorcycle's owner's manual.
