Spark Plugs - how often to change?

[SkooterG]

Definitely runs smoother.

Really? I call B.S. Placebo effect. I go 30-32k miles between spark plug changes (replaced during valve checks) and I notice no difference whatsoever. And that is from *many* spark plug changes.

Wow, that's pretty "closed minded" of you to disagree with what he felt.

Just because YOU didn't feel any difference doesn't mean HE didn't.

Actually you twit, it wasn't close-minded at all. It was presumptive. Do try and keep up, eh?

 

[Falko]

how you ride has a lot to do with plug change effect. These engines can carbon a bit if you load them.