frosty plug

[300EXer]

the plug on my 300 is kinda frosty in spots. wuts that mean? and how do i fix it?

[300EXer]

bump

[R-Crazy]

what do you mean "spots"? is it worse in some areas or is it just a random spot. maybe the plug is corroded. have you run it lately?

dave

[300EXer]

well i was out rippin and i decided to go home. so when i got to my driveway, it idle pretty low, so i shut it off and checked my plug. it was kinda white and frosty. does that mean its too lean? and i heard if u run lean that it will screw ur engine real fast so i did a compression test and my engine fine but now it wont even start. wuts wrong?

[brian400ex]

This may sound dumb but it has happened to me.

[RED121572]

Frosty? Is it snowing in there? ;)

When you say frosty, that tells me that it is white. A white plug would mean that your probobly running lean. You prob need to fatten your jetting up just a hair.

I know this is a little off beat, but itll give you an idea...

My pooparlaris service manual says that the bike is tuned from the assembly line with a 150 main jet. Temp ranges are 40-80 degrees. Any colder than 40, it says to stuff a 155 main in...which i havent done yet.

I hope this helps. Let us know what you find out.:)