ask a mechanic
If two of the 24 push rods in an engine are not moving, there may be issues with the associated lifters, rocker arms, or valves. It could be due to a lack of lubrication, a mechanical failure, or incorrect adjustments. Consult a professional mechanic to diagnose and fix the problem.
Replace them.
You don't fix this. It is part of what makes a Harley a Harley. Go buy a Honda if you don't like vibration.
To fix a Harley fuel tank, first, ensure the tank is empty and clean. If there are dents, you can use a heat gun and a rubber mallet to gently reshape it. For leaks, use a reliable epoxy or sealant specifically designed for metal tanks; apply it according to the manufacturer's instructions. Finally, repaint the tank if necessary and allow it to cure fully before reinstalling.
To fix the push rod on a GMC Typhoon, first, ensure the engine is cool and disconnect the battery. Remove the valve cover to access the push rods, and inspect for any bends or damage. If damaged, replace the push rod by carefully removing it and installing a new one, ensuring it sits properly in the lifter and rocker arm. Reassemble the valve cover and reconnect the battery, then start the engine to check for proper operation.
duct tape
Knockimg is not good but can be caused by a lot of differant things Lifters ,rod or main bearings, valves or push rods and engine timing can make an engine knock Some are a quick fix while others are more involved
clutch basket on 89 Harley
You don't need to fix it.
You will not be able to fix air conditioner leaks by yourself. You will need to find and call a qualified technician. Use your local yellowpages book or yellowpages.com
You may consider unistalling it and reinstalling it, if it is unclickable after restarting does not fix it.
Welding with cast iron welding rods