[Irving]

Put in some brand new NGK plugs and rode a couple hundred miles. Here they are. What do you think these are telling me?

 

[Simo]

One is oil fouled ( bad rings, bad valve seal or both?)

 

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and the other looks a little lean

 

[Irving]

One is oil fouled ( bad rings, bad valve seal or both?)

That's what I thought. Thanks for helping confirm. I'm a bit new to reading plugs. This is the CB200 that despite the fresh rebuild (new rings and all new seals+gaskets, valve lapping, etc) only tests about 100 psi per cylinder.

 

[Irving]

and the other looks a little lean

Should it preferably be a bit more gold/tan/brown?

 

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Yes. That's perfect color

 

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sorry for the late reply. been hectic these past few weeks