trojac wrote:
I bought my first rally back about 4 years ago and in the 25 years or so that it wasn't mine its had many things replaced/updated so I don't know for sure.
If it's an original will it have a piaggio stamp on it?
First of all, is there a chance that you have an expansion chamber exhaust on the scoot now? "Loud and tinny" fits the description of how they sound.
Looking at pictures on the web should make it easy to compare with yours. An expansion chamber pipe looks like a snakey trombone thing, and box type (which includes stock, as well as Sito and SIP Road) looks like a black pillow.
If it's a box type, I'm not sure how to determine which kind it is... Looking at pictures, it seems that a stock Piaggio box might have numbers (part number?) stamped on the left side.
Like others have said, a stock exhaust is as quiet as it gets, while other box types get a little louder, but have the benefit of delivering more power.
The SIP Road is popular, and while still a little bit louder than I'd personally like (I'm with you - quieter is better!), delivers a bit more of a throaty roar. Search Youtube - there are lots of audio samples (of varying quality and usefulness) of all kinds of pipes!