nc30 running rich

[stefan]

Hi i followed a guide on the internet to rejet the carbs and drill the sliders, the bike also has race exhaust pipes and a aftermarket end can the airbox is standard. The bike is running rich at the moment and im not sure if it is just the mixture screws or a different issue, the bike hasn't been rode yet as it is still being put together it has been warmed up and taken off the choke to check it wasn't the choke, any advice would help

[Cammo]

Why do you think it's running rich?

[stefan]

hi the spark plugs are black

[CMSMJ1]

you need to ride it to get any kind of reliable idea from the plugs.

They will be rich at idle..


@ Cammo - can you put a disclaimer in your jetting thread? Too many people doing this to their bikes without knowing why or even if they need it.

[Cammo]

Yeah good idea Mark, will get it done when i'm at the pc.

[CRM]

It worries me the people happily drilling slides, personally for me it's only made things worse or masked another issue.
Honda knew what they were doing from the start, granted the 30 can be lean in the midrange and some hide this better than others.