Color of a plug

[luvmyex]

Ok i jetted my 400 today.I was told the plug should have very lil carbon on it when its right.OK Heres what i have.The airbox lid is open and covered with a outerwear and on the filter.The pipe is stock but ive cut the two baffels ot from the inside and still have a stock endcap.I just took off the choke also.Then I went to a 42 pilot put in a new plug and wound up with a 158 main.The plug still has a lil carbon on it but nothing like it was at 148stock.I may try a 160 and see if it clears up the rest on it.Or am i getting to high on the main jet.Seemed like the bigger the jet i went the more i had to bak out the air mixture screw.Is that right also?What should the plug look like? Thanks for any help.s

[redrider ex]

:D

[eldoexrider01]

hes wrong all wrong... it should be light beige!!!:D

[DantheEXman]

someone post a pic

[Dienamo111]

The plug should be a light tan if done and adjusted correctly. 160 main may be a little fat you may want to remain around 158 or 155 this could eliminate the agressive adjustments on the air/fuel screw. Also the air fuel shouldnt have to be adjusted much after making this sort of mod, maybe a 1/4 turn ouut more thats all. :)

[quadfamily]

Also make sure you're only looking at the porcelain on the plug. The rest is usually black and that's normal.

[Pappy]

i like the porcelien paper bag brown;)

[luvmyex]

One more question.I think my rings may be about gone.It smokes,but not as bad after rejetting.It was really rich.Would this cause the plug to get black too???Or am i not jetted right yet?Oh yea im using a fair amount of oil too.Im getting a rebuild soon as i get the cash.either a 416 or 426