Re: I find the Tanak PF-4000 ear shattering loud !
I'm running a Tanaka 40cc & Tanaka 47r on my motorized bicycles
Both are equipped with poo-poo pipes (stock china girl mufflers) & much quieter than their stock cans.
I also wrapped both with black header tape to avoid the accidental burn.
If anyone wants to sell their Tanaka 40, I'd be interested...