Re: slip on pro-circuit pipe
You didn't read my post-New T-4 WOW!!!!-so, I tell ya the same thing I said in the post.
I live and ride in southwest Ohio, around 1000' above sea level. Last week, I put a new T-4 on my 2001 400ex. I have a stock airbox, and filter (soon to be either twin air, or UNI filter). I am running a 155 main jet, and a 45 pilot jet. The pilot is too rich, and I am going back to the dealer to get a 42. I tried adjusting the fuel screw, but ended up at ~1 turn out, which means that I'm too rich. the Ideal fuel screw setting is like 2-2.5 turns out. Anyway the bike now flat gets with the program from the midrange on up [img]images/graemlins/burnout.gif[/img], and sounds cooler than hell!!!! [img]images/graemlins/grin.gif[/img] I think I might trade my extra spark arrester(don't ask), for a smaller end cap to gain some low-end. I have no internal engine mods yet, but am planning on a std. bore wiseco piston kit, and an XR400 cam sometime next winter. then a header, and then this and then that and then some more......
(Sounds expensive huh?)