OP asked about searching forums posts, so if its forum posts you want and not just one person's constantly plugged personal site the best bet is to use Google to search BikeForums.

the syntax you'd wanna use is " <Search Terms> site:bikeforums.net" where you replace <Search Terms> with the actual terms you're searching for.
Also we're fairly friendly when it comes to re-hashing old stuff so if you're stumped just start a thread and ask.