So, to make a long story short (I hope), I am now the proud owner of a 1987 CR250. It's actually in pretty decent shape, with only a few areas in need of attention. These areas of attention are where this story starts.
My brother in law also owns a 1987 CR250, so when I found an auction going for a HUGE assortment of 87 CR250 parts, we jumped on it. So in the end, for a whopping $76 we got, pristine radiators, complete front and rear wheels, complete front and rear brake assemblies, front forks, rear shock, swingarm, cylinder head, a huge bag of nuts and bolts and (what we thought at the time) a stock pipe.
So I start tearing into my new project today, and my bro in law starts looking at my bike and comparing the thrashed stock pipe that I have on the bike to the one we purchased from the auction. It becomes readily apparent that this is not a stock pipe. As he hands me the pipe, I can see faint raised letters in the pipe, that read from top to bottom "P S I ".
I've never heard of these pipes and was wondering if anyone else had? The color is the same as stock (flat black), but has a very similar shape to that of my bro in laws FMF that he has on his 87. So, does anybody know of these things? Good? Bad? Thanks for any info!