Plug Chop?

[sredish]

I read the strap and the tip of the insulator. Personally, I want the insulator a light/med. brown color, and the strap black. If the insulator gets much darker or if the strap and electrode start getting wet, I'll back off. I do look at the color on the outside ring also. But it depends on the situation to look at what area. If your concerned with the timing then inspect the insulator a little closer. It's all about knowing how to read the plug and where to look for what.

[cheezehead]

There's alot of color on that plug.I do a chop with a brand new plug and look for the smoke ring at the bottom of the ceramic insulator.(2mm-4mm)My plugs look near to this one after some hours on it.It's a tad darker than mine...

ya it's gotta go down one or 2 sizes I think this was a new plug but was after a 5 or so mile run

[@@banshee_rider@@]

if that is rich i am runing 270 mains and it is darker than that.

[Banchetta]

if that is rich i am runing 270    mains and it is darker than that.

After running it wide open in 6th gear for 5-10 seconds and shutting it down quickly??

[KRMit]

if that is rich i am runing 270    mains and it is darker than that.

After running it wide open in 6th gear for 5-10 seconds and shutting it down quickly??

I think he's talking about stock carbs.

 

Running a single carb has different jet sizes.