[kippen]

Hello all,

In April I picked up a CB350 in boxes. It's all back together, but it was running really really rich. I've opened up the carbs 3 times now and I think I've finally got everything sorted, but I'd like to get a little feedback to make sure. Here's what my spark plugs look like after 33 miles of riding today. These were brand new plugs. Can anyone comment on how they look?


Thanks for any and all help

 

[FrankyV]

It appears as if the bike is running rich based on the black color

 

[Gixxer-18]

FWIW I think from the photo that your not too far off. The insulator is still clean, but the outside has some discolouration. For 30 odd miles of riding, that's not a too rich mixture.

Nigel

 

[TexasMark]

Rich to Lean, mine are pretty close to the second from right on both of my SL's and run very well.

 

[kippen]

Thanks for the replies. If it's slightly rich, what would be the first thing to change, in terms of jetting? It's running stock jetting and it's at sea level.

 

[Gixxer-18]

Can you live with how your bike runs? It's not far off perfect now?

 

[kippen]

Can you live with how your bike runs? It's not far off perfect now?

Yeah, I can live with it, but if I can make it even better I don't mind tinkering around to try. It cruises quite well as it is now.

 

[FrankyV]

I would just ride it, if it gets difficult to start or begins running bad, then you can switch to to the next smaller secondary jet, e.g. 115 to 110.