Get proper plug spanner (hexagonal tube-type thing)
Don't attempt while engine is hot. (you'll burn yourself)
Pull leads off plug tops, unscrew plugs (anti-clockwise)
Inpsect. Should not be all black and oily. If they are go to bike shop.
Screw new plugs into holes. Ensure they're going in straight. They should be as easy to screw in as they were to screw out. If they get tight prematurely you might be cross-threading them (bad) Maybe add a little oil to threads to ease insertion. Don't over tighten. Read instructions on box. About 1/4 to 1/2 turn after the washer seats is good. Shove plug leads back on top. Go for ride.
Don't attempt while engine is hot. (you'll burn yourself)
Pull leads off plug tops, unscrew plugs (anti-clockwise)
Inpsect. Should not be all black and oily. If they are go to bike shop.
Screw new plugs into holes. Ensure they're going in straight. They should be as easy to screw in as they were to screw out. If they get tight prematurely you might be cross-threading them (bad) Maybe add a little oil to threads to ease insertion. Don't over tighten. Read instructions on box. About 1/4 to 1/2 turn after the washer seats is good. Shove plug leads back on top. Go for ride.