Jetting question - need help.
Posted December 27, 2005 - 01:24 PM
The 2006 WR450F stock has the following jets installed according to the manual:
165 main, 45 pilot, 65 starter, and 50 leak.
Does this mean all I have to change is the pilot and starter jets along with the JD Red #5?
Is it worht rejetting the bike based on such small changes?
re-jet the bike using INDY450's jetting chart:
Elevation 0 to 4,000. feet
30 to 45 degrees: 172 main, JD Blue #5, 48 Pilot, 2.0 turns, 75 starter jet, #0 leak jet
45 to 60 degrees: 170 main, JD Blue #4, 48 Pilot, 1.75 turns, 72 starter jet, #0 leak jet
60 to 75 degrees: 168 main, JD Blue #3 or JD Red #5, 48 Pilot, 1.5 turns, 70 starter jet, #40 leak jet
75 to 90 degrees: 165 main, JD Red #5, 48 Pilot, 1.25 turns, 68 starter jet, #50 leak jet
90 degrees plus: 160 main, JD Red #4, 45 Pilot, 2.0 turns, 65 starter jet, #60 leak jet
Posted December 27, 2005 - 02:13 PM
BTW, it's real easy to change the pilot jet if need be. I personally like to run a richer starter jet because it seems to help with cold starts, and my bike ran best with a 50 leak jet when the chart called for a 40.
Posted December 27, 2005 - 02:31 PM
However depending on how open your pipe and air box is will make subtle differences. Also the 05 and 06 have milder combustion chamber shape combined with lower compression. All these will make some variation from the chart. The real advantage is to use the chart as a guide for going on trips to different elevations or weather. I ride all over the US so I developed the chart so I could rejet at home instead of during the ride trip.
Posted December 28, 2005 - 11:51 PM