I'm sorta toying with the idea of putting an FMF Shorty silencer on my '75 TM400. It has a stock pipe and I wonder if anyone knows the dimensions of a big bore shorty or where I can reference the information?
Specifically, I'm interested in the bore sizes available. Of course the length is important as the stock pipe tapers to very near the back fender, but I think I can squeeze one in there.
Along those lines, the stock "pickle" silencer appears on e-bay from time to time, but I wonder about it's silencing ability. Also I wonder which would be better tuned for the bike. I know the stock one would enhance the value, I just wonder whether it would enhance the performance as much as a more modern aftermarket product. :think: