CHANGING your bike's spark plugs isn't a job that usually needs doing regularly. Check youre mileage and the owner's manual to see whether it's due.
Changing the plugs on some bikes takes a matter of minutes, while others can take a novice several hours and require the removal of the radiator. Got a V4 Honda? Consult your local dealer, as it can involve draining the cooling system.
Make sure you have the correct plugs for your bike; the code number on each one will differ from manufacturer to manufacturer. Check the owner's manual for the correct gap; you'll need feeler gauges to set it correctly.
Remove one plug at a time to avoid mixing up the HT leads. Carefully avoid overtightening them. Screw in by hand and nip them up a quarter-turn with a plug wrench.