Alright,

according to this page:

http://www.tokyo-hobbies.com/hatoriair.html

Hatori used to make a #530 muffler and #577/588 flexible connecting pipes. One is references as "inside" the other as "outside". Not sure what the difference is.

I read in another thread that Central was apparently selling Macs 1020 (25-32 2-stroke) quiet tuned pipes for use with the YS FZ 53/63's [X(]

I wonder how the YS 53 would do on a 32 sized Hatori #300 tuned pipe?

David.