Scooterotica

What does a black slightly shinny (but seemingly not wet) plug generally mean? She's running okay bit boggy at low revs but quite nice to ride. Any ideas?

Thanks

John

try a hotter plug

Could be running a bit rich, main jet too big ?

I agree it indicates its too rich and I know its a bit boggy down low but otherwise it's running well. So is there any downside to this plug colour if its running well, starting first kick etc?

Jxmiddle wrote:I agree it indicates its too rich and I know its a bit boggy down low but otherwise it's running well. So is there any downside to this plug colour if its running well, starting first kick etc?

Fuel consumption is the most obvious one plus carbon build up. Have you changed/cleaned you air filter lately?

Hmm very good point. I'll take a look at that. Thanks.

my plugs are always white, with a silver bit on the bottom, and some writing on them. been the same colour for years.

i had this problem, as I had the carb recently had a look and it was the choke cable not housed properly lifting it slightly and making it boggy at low revs and black plug.

Thanks Yozzer, I'll take a look at that too.