While we are on the topic of extractors, may I ask what a length-tuned extractor means? Contemplating changing mine, but I've got several definitions of "length-tuned" since I began asking. Are stock extractors length tuned?

BTW, Bro soulfly, do you recommend a change of extractor after, say, 10 years of use? Kinda worried about deposit build-up.

P.S: If you think this question should be moved to the 'Basic Intake and Exhaust Modification Guide', please do proceed OR let me know

But how about carbon deposits?
A few days back, I was cleaning my carb (using a can of carb cleaner) & while cleaning I caught sight of a 2 cubic-CM (...roughly, I didn't take precise measurements ) chunk of what I believe was carbon deposit flying out of my exhaust pipe. I'm unsure of it's origin, but my 1st guess was the muffler.

How thick can these carbon deposits be? To the extent of narrowing the exhause passage? Any experiences?

Geez... I thought carbon hardens under heat?
You mean I can't get that much of deposit even if my carb has been detuned (TOO lean) for a very long time?
Intake seems fine. I'll need to get rid of my muffler though, I think this might be the main culptit