Posted August 19, 2004 - 07:07 PM
Posted August 19, 2004 - 07:30 PM
Posted August 19, 2004 - 07:35 PM
Posted August 20, 2004 - 08:21 AM
Posted August 20, 2004 - 07:29 PM
R.M., it shows up as #14 on the carb blow-up in my manual ('03). the 4JT-1494F-03-00 is a yamaha part number.
Posted August 20, 2004 - 08:06 PM
Posted August 21, 2004 - 06:06 AM
Posted August 21, 2004 - 02:09 PM
I JUST GOT DONE JETTING AN 04 450 WITH THE SAME SET UP YOU HAVE. FOLLOW THE EUROPEAN SET UP IN YOUR MANUAL FOR THE MAIN AND THE PILOT. I BELIEVE IT IS A 172 MAIN, 40 SOMETHING PILOT, CLIP #5 ON THE NEEDLE (IF YOU HAVE A BOG GO TO CLIP #3),AND 2 1/2 TURNS ON THE FUEL SCREW.
Posted August 21, 2004 - 06:40 PM
tree bark, i use the stock exhaust (gytr stainless header) with gytr insert. i've been playing with my jetting but when i ran the show-me 200 duel sport in june i ran, 45 pilot, 155 main, JD red needle with the clip in the middle, 50 leak jet, pilot fuel screw out 1 3/4 turns. i ran the main a little lean (a 160 would probably be best)to try for just a little bit better millage. not a lot of main jet time on that ride.
i have since blocked off the acv and went to a 42 pilot. i think a 40 might work a bit better. i've run the fuel screw in to about one turn out and there is no off throttle popping. this weekend i'm going to try the 100 pilot air jet/ 40 leak jet combo. i will leave the 42 pilot in as the pilot air jet will put more air in the pilot cicuit. as you can tell, i'm always mess'n with stuff.
Posted August 22, 2004 - 12:54 AM