Posted December 10, 2005 - 05:14 PM
Posted December 10, 2005 - 05:36 PM
Posted December 10, 2005 - 05:43 PM
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
Posted December 10, 2005 - 07:37 PM
Posted December 10, 2005 - 07:43 PM
Posted December 10, 2005 - 08:36 PM
Elev: 4500 to 8000
30 to 55 OAT
1 1/2 fuel screw
JD blue 5th pos.
Posted December 11, 2005 - 04:09 PM
Thanks for all the suggestions. I am going to pick up a 48 pilot jet and 0 leak jet. Would these same settings work on an 04 YZ250?
the 250's emoltion tube is not as efficient and bigger mains are required rather than smaller. They don't need as much fuel as the 450's.
WR's also have ACV circuit which screw jetting around.
You have to do the throttle stop mod (just buy a yz one). If you don't have this done, this is why your bike is crap.
Posted December 12, 2005 - 06:15 AM
Posted December 12, 2005 - 03:48 PM
Posted December 12, 2005 - 09:09 PM
pull the side plate off the right side of the carb, where the throttle cables go into. you should see it to the back of the carb. If you can't, just twist the throttle and see what is stopping it!
I had the dealer remove the throttle stop but I don't know if they changed the throttle screw to the YZ (I don't think they did). I have a YZ throttle screw but I have not put it in yet. I have to find where the old one is so I can change it but I can't find it in the carburetor schematic.
If the dealer changed the throttle stop, this is it!
There is no throttle screw..... you have been mistaken. Don't worry about it.
Take it out and measure it anyway. if it is over an inch long before the head of the stop, it is the wr one. the yz one is less than an inch long (not including the head).