A fellow 02 WR426 rider in need of help
Posted October 13, 2002 - 09:22 AM
Posted October 13, 2002 - 09:47 AM
Posted October 13, 2002 - 11:13 AM
Re: High-altitude Jetting results - Colorado
Re: '02 WR426 Jetting in the Denver area
Re: Re-visit High Altitude Jetting
As both of you guys have noticed, altitude affects jetting. You need to jet your bike. Another thing you may NOT have noticed is that intake and exhaust changes also affect jetting. The fact is that as soon as you remove that pencil-sized exhaust restriction you need to rejet.
If you own a YZ and live near sea level odds are your bike runs okay. Otherwise you are missing out if you run stock jetting in a 426.
Posted October 14, 2002 - 06:01 AM
If your uncorking the bike for the first time (lid, throttle stop, butt plug), I'd suggest YZ jetting (again, search function)..........
If that's not enough punch, look into YZ timing...........
Wealth of knowledge on this site, search and you'll have weeks of reading to do...........
As you can see, I'm very close, let me know if you need help.............
Posted October 14, 2002 - 07:12 AM
Posted October 14, 2002 - 06:05 PM
Posted October 14, 2002 - 07:02 PM
How to Rejet your bike.
Step 1) Go to TTalk and find jetting specs of members w/ same bike who ride at same, or close to same, altitude and climate (see links above).
Step 2) Remove carb, remove jets and replace with parts specified by best consensus of TTalk members. Consult owner's manual as needed.
Step 3) Ride and be happy.
BK Mod. Named after Brian Kinney (I think that is his name), Tim Ferry's mechanic, who originally posted this mod to TTalk. It refers to a tab cast into the body of the '00 and newer 426 carbs, through which you could drill and tap a hole to accept an adjustment screw that would limit, or act as a stop on, the accelerator pump mechanism.
ACV valve: refers to the Air Cut Valve, some kind of emissions foof found on WR carbs that leans the mixture at idle. Do a search for detailed instructions on how to disable this sometimes troublesome carb engineering band-aid.
Hope this helps.
Posted October 15, 2002 - 04:15 AM
Posted October 15, 2002 - 04:23 AM
Don't fret too much about removing the carb, it looks complicated, but it's actually real easy to work with.
Have fun .....
Posted October 15, 2002 - 09:20 AM
My jetting is in my sig line if you want to try that. Notice though that I have a vortip exhaust, throttle stop cut and the airbox lid is removed. If you want some actual help I would be happy to give you a hand.
I try to tune my bike a little different than most but it seems to work. I think I told Wicked how I did it on a winter riding thread but I dont know for sure.
The carb is really easy to work on. If this is the first time you have done jets, I would suggest that you only do one thing at a time, test ride it, and then change something else. This allows you to see how clip positions effect performance, and MJ vs. PJ performance. It was a real education for me.
Last advice: Set the bike up for the way you like to ride. This bike, throttle stop removed, can generate some monster hit late in the throttle. Some people love it. I dont like it for the way I ride, so mine has been tamed down a bit.
Good luck, You wont belive how much proper jetting effects the fun factor.
Posted October 15, 2002 - 09:34 AM
But, for normal weekends, West Magnolia area just south of Nederaland is real sweet, some awesome single track, and a lot of real fast fire roads. We do a ride from West Mag, though Eldora, and up to Yankee Doodle Lake.......it's a trail called Jenney Creek (she likes to drown bikes ). If you've never done the ride from Nederland to Winter Park, I highly recommend it, very cool. We also have a mostly single track ride from Bldr Canyon, though the next two canyons to the north, ending up at Jamestown. We used to be able to go all the way to Peaceful Valley, but they have since closed the Battlerat Trails . There is always Lefthand canyon, oh boy, that place is nuts. Real loose, lots of 4x4's and quads, but there is a lot of trails, and let me tell you, VERY GOOD PRACTICE!!!
Other than that, I REALLY try to motivate myself, and go to farther places, stuff around here is just to crowded, over used, and well the same ol same ol. I rode Rabbit Valley again this weekend, OOOOOOOohhhhhhh man, what an incredible ride.
Feel free to shout at me for riding, I'm on the scoot usually both days of the weekend.