WR426 JD kit jetting help please James Dean
Posted April 12, 2007 - 12:21 PM
Posted April 12, 2007 - 01:38 PM
Posted April 12, 2007 - 03:14 PM
Model (400 - 426 - 450): WR426F
Cam Timing (WR/YZ): WR
Main jet: 170
Pilot Jet: 45
PAJ: 75 stock
MAJ: 200 stock
Leak Jet: NA
Starter Jet: 65 stock
Fuel screw (turns out): 1.5
Needle Model/Clip position: Blue JD needle 3rd position
Grey Wire Mod (Y/N): Y
TPS Connected (Y/N): Y adjusted to specs
Airbox Snorkel/Lid (on or off): off
AIS Removed (Y/N): NA
Airfilter Brand: UNI
Exhaust Brand: WB E2
Average Altitude: 0-1000
Average Temperature: 60
Average Humidity: 80
Degree of Satisfaction (0-10): 10
Additional Mods/Comments: Thin JD O-ring used on accel. pump linkage
Lots of low-end grunt and power everywhere on the RPM range.
No more hesitation or missfiring at cruising speed (TPS adjustment fixed that)
This is my setup and it works great from 0-1000ft.
You should be ok with the 170 main
Other things to check
TPS adjusted correctly
Spark plug gap
It also helps to periodically remove all of the jets and flush out the carb (both fuel and air passages) with carb cleaner and then compressed air.
Posted April 13, 2007 - 05:27 AM
Posted April 13, 2007 - 06:36 AM
thanks for the replies guys! but keep them comming! i was hoping James Dean would chime in sometime also. i tried it out again last night by adjusting the fuel screw and got it a little better throttle responce i think. the bike is in tip top shape so the only thing it can be is jetting as far as i know.
PM James directly. This is a huge site and to expect him to peruse all the threads is asking for a bit much, don't you think? He has ALWAYS replied to my PMs within a day or two.
Posted April 13, 2007 - 07:41 AM