black spark plug

[twgranger]

what does it mean when my spark plug is black? am i mixing my gas to rich?

[TRI-Zbrian]

it means it is running very rich what are you mixing your gas at i wouldnt try correcting this by leaning your gas out to much or you will blow the engine up

[twgranger]

i was running 20:1 with some cheap trailprotrailprotrailprotrailpro from autozone. but i just got my bike back today from getting rebuilt and the guy told me to use klotz r 50 racing synthetic oil. so i bought some and now im waiting to run the rest of that shitty gas out. he told me to run the new oil 50:1. he said the spark plug should be golden brown or something like that.

[skippy]

yepper.. never cheat your self on the oil, or it will cause you more probs then its worth.. even if you use that cheap stuff, you should be fine w 32:1 for now,, but get a bunch of new plugs and get some good oil, and start testing,, how is the bike running? smoke out the rear? bogging? whatz yr jetting?

[TRI-Zbrian]

i dont no about 50 to one but i usualy run mine at 32 to one i wouldnt go any leaner then 40 to 1 but if its realy good oil then u might be able to pull off 50 to 1 i alwase like to run mine a little rich thow.

[twgranger]

with the cheap stuff running 20:1 it smoke and it is boggy. the guy that rebuilt my z has a 250r and runs koltz r 50 racing synthetic oil runs it 50:1 and now thats what im am going to try now once i run that shitty gas out.

[J.D.]

Dude, don't be stupid! Get that cheap crap out of there ASAP! Take the gas tank out and dump it out, get the good stuff in there bro!

[TimSr]

Klotz will run fine at 50:1. happy trails!

[twgranger]

thanks for the info guys ;) I dont want to ruin my new piston. Oh how long do i have to baby my z for? I just had the new piston and bore job done and ive rode it for about 15 min today.

[TimSr]

For a 2 stroke top end, 30 minutes is adequate.

[twgranger]

cool, i thought it would have to be for a couple of days. i dont think i could handle that.

[twgranger]

well i drained the shitty gas out and put the new stuff in and now the plug is running golden brown :-D Now that is how it is suppose to run right? before with the other kind of oil i was using and the ratio the plug was black.

[TRI-Zbrian]

hey remember to retorque (spelling) the cylinder and head also when the moter is cool you have to do this a couple of times when a motor was just rebuilt. other wise you can end up with a leaky gasket.

[twgranger]

hey remember to retorque (spelling) the cylinder and head also when the moter is cool you have to do this a couple of times when a motor was just rebuilt. other wise you can end up with a leaky gasket.ok, but is the plug suppose to run golden brown?

[TRI-Zbrian]

yes golden brown is what you want white would mean its too lean golden brown is perfect. congrats you have fixed the prob golden brown meens the jetting is right on man

www.ericgorr.com this web site has a spark plug guid that will tell u how your engine is running by looking at your plugs plus there is alot of other usefull info

[200Xtreme]

I always use AMSOIL synthetic 100-1 oil. The best, never had any probs.

[twgranger]

found out why i was fouling plugs :-D the jets were way to high :x now it runs like a bat out of hell :twisted: