How To Tighten a Spark Plug on Your Motorcycle
Most do-it-yourself motorcycle mechanics change their own spark plugs. Most also don't know how much to tighten them to seat properly.
Here's How to Tighten a Motorcycle Spark Plug:
- Ensure that the area around the spark plug hole is clean before removing the old plug.
- Make sure the threaded area of the new plug is clean and dry. Resist placing any oil or WD-40 on the threads.
- Insert the plug making sure that it is threading correctly. You don't want to damage the hole by cross-threading.
- Tighten with your fingers until you feel the crush washer starting to seat at the bottom.
- Tighten 1/4 to 1/2 turn more.
Tips:
- If you have a torque wrench and can find a specification in your owner's manual as to how much to tighten the spark plugs, use that value with your torque wrench to tighten the plug.
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