ORIGINAL: jaka
Hi!
It has definitely nothing to do with how the engines are tuned!
Both these silencers are the same inside ,only the exhaust diameter differs.
The ASP has a little less diameter and the OS some more.
Have you tuned (set the low end needle) your engine after the change of silencers?
I think you might be thinking of an older model ASP muffler. As they are definitely different, at least the canister portion of it is.
Here is a pic of an OS muffler
And the ASP like I am talking about (assuming the OPhas the same muffler)
The shiney part in the middle is the baffle, which can be removed.
The baffle in an OS muffler looks like a funnel shaped deal and nothing like the baffle inside the ASP. At least on my engines it is this way.
I removed the baffle in my 52 which made the muffler can at least an inch shorter. Thus thinking this is causing my tuning issue for a reliable idle. IDK???
Anyway, not trying to be argumentative here. Just trying to get the facts out there about the differences in the two mufflers and my experience with my own 52 when removing the baffle.