Spark plug reading

[Toby woodman]

I’m having a bit of trouble “reading” the spark plug on my engine. Does it look like it is running rich or lean

 

[DAMIEN1307]

Here are some charts on spark plug diagnosing.

 

[darwin]

Looks to me running rich. Is it too much oil or fuel or both? Plug looks new as far as wear.

 

[Toby woodman]

I’m running a break in ratio so it could be oil. It’s four stroking at high rpm so would that mean a bigger main jet. I’ve only been running at medium rpm so would explain why the plug looks rich even though it is running lean at high rpm. Should I adjust the needle and get a slightly larger main jet

 

[darwin]

If it's oil it means you're using too rich a mix, carb adjustment won't fix that.

 

[Chainlube]

I’m running a break in ratio so it could be oil. It’s four stroking at high rpm so would that mean a bigger main jet. I’ve only been running at medium rpm so would explain why the plug looks rich even though it is running lean at high rpm. Should I adjust the needle and get a slightly larger main jet

If it four strokes, it means you have too much fuel and it will only fire every other stroke. Probably need to go down to a 68 jet.

 

[Rafael]

Its "OK" but, seems to have too much oil

 

[GW's Motorized]

Toby, is this on your 2 stroke or 4 stroke bike?

 

[darwin]

Toby, is this on your 2 stroke or 4 stroke bike?

Looked at some of his posts, should be a 2 stroke.

 

[DAMIEN1307]

This was way back in March 19th guys...Your a little bit tardy to the party...lol.