wow sparkplug

[trx400 rider]

ok well i just called honda and asked for a spark plug for my trx450r and they said $16 i was like for a spark plug? i was use to my 3 dollar trx400ex spark plug lol. any way how do i know if i need a new one or not.

[trx400 rider]

any one

[tflatt]

if your bike cranks and runs good no, if your asking if you should keep a spare the yes

[Oz24]

^^
Ditto

[Baileygunns]

Go to your local auto parts store and get the plug... Trust me.

[Ichoptop]

you need a new one if either side of the electrode is bent or pitted. If the cerami is cracked or you are no longer getting ful spark or getting an erratic spark.

A simple cleaning works well most the time. Some light emery cloth can do wonders.

[Baileygunns]

Do not clean or gap iridium plugs... Just get a new one. It takes the iridium coating off the electrodes. You can clean (usualy) and gap standard plugs with out issue.

They're about $8 bucks at any autozone, NAPA, Discount auto etc.

[joeptc]

i use the e3 spark plug and got it from oreilys auto parts for like 6 bucks. i can tell it starts easyer than my old plug and seems to have a little better response.