using hot or cold plugs..

[2001400exrider]

im just using stock plugs but foul em quite often and im wondering if i should be using a colder plug? im not runnin rich... and also im jetin my quad tonight cuz i got an HMF full system and uni filter, should i jet with stock spark plugs? im asking because i got 2 of them sitting rite here.

[wilkin250r]

First, if you're fouling plugs, you should use a HOTTER plug, not colder.

Second, how are you sure you're not rich? When are you fouling, at idle or while riding?

[44oEX]

the plug won't change the jetting, you should put a new one in there so you can get a better reading tho, as for the heat I would like to know to.

[Silverfox@C&DRacing]

colder plug is recommend for high compression pistons.