To check and/or replace the drive chain tensioner on a Harley-Davidson motorcycle, follow these general steps:
Prepare your workspace: Ensure you have a suitable area to work on your motorcycle, preferably a flat surface and a set of basic tools.
Lift the motorcycle: Use a motorcycle lift or a sturdy stand to raise the rear wheel off the ground, allowing the drive chain to be properly inspected and serviced.
Inspect the tensioner: Locate the drive chain tensioner, which is usually positioned on the bottom part of the rear swingarm or near the transmission. Inspect the tensioner for any signs of wear, damage, or excessive slack in the chain.
Check the tensioner adjustment: The tensioner may have an adjustment mechanism to regulate the tension in the drive chain. Consult your motorcycle's service manual for the specific method to adjust the tensioner. Generally, there will be a locknut and an adjusting bolt. Loosen the locknut, turn the adjusting bolt to increase or decrease tension, and then tighten the locknut to secure the adjustment.
Measure the chain tension: Use a chain tension tool or a ruler to measure the slack in the chain. Typically, the chain should have a specified amount of slack, which can be found in the motorcycle's service manual. Adjust the tensioner as needed to achieve the recommended slack.
Replace the tensioner (if necessary): If the tensioner is worn, damaged, or cannot maintain proper tension, it may need to be replaced. To replace the tensioner, follow these general steps:
a. Remove the retaining hardware: Depending on the specific tensioner design, you may need to remove retaining bolts or clips that secure the tensioner in place. Take note of the location and orientation of any washers or spacers.
b. Remove the old tensioner: Carefully slide or pry the old tensioner out of its position. Be mindful not to damage any surrounding components or the drive chain.
c. Install the new tensioner: Insert the new tensioner into the appropriate location, ensuring it is aligned correctly. Reinstall any washers or spacers in their original positions.
d. Secure the tensioner: Use the appropriate hardware to secure the new tensioner in place. Follow the torque specifications provided in the service manual.
Recheck and adjust chain tension: After replacing the tensioner or making adjustments, recheck the drive chain tension using the method described in Step 5. Make any necessary further adjustments to achieve the recommended slack.
Lower the motorcycle: Once you have completed the inspection, adjustment, or replacement of the tensioner, carefully lower the motorcycle from the stand or lift.
Remember to consult your specific Harley-Davidson motorcycle's service manual for detailed instructions and specifications related to your model's drive chain tensioner. It is also recommended to refer to the manual for any specific torque values or special procedures during the process.