WR/YZ426 Jetting in Colorado
Posted March 05, 2004 - 05:45 PM
Thanks for your help.
Posted March 06, 2004 - 04:57 AM
Posted March 06, 2004 - 12:27 PM
Posted March 06, 2004 - 01:37 PM
Posted March 07, 2004 - 06:09 AM
I got the parts at Sudco as well. LarryCo did a ton of work with Taffy to get this jetting right. I just copied his and left it alone. It runs great this way and there are many people on TT who also run this setup here in Colorado. JD's kit may work fine for you and it may not, I can't give you input on this, maybe someone on the site who lives in Colorado can.
I can't comment on the Yamaha shop here in Fort Fun anymore. My son is very good friends with the son of the GM and I don't feel it would be right for me to say anything either way. I've given him some comments and hopefully, he'll fix some of the issues. You've been there, you know.
Where are you in Fort Collins? I live off Timberline, South of the Movie theatre.
Posted March 08, 2004 - 07:49 AM
I also bought the JD kit and live in Highlands Ranch. The JD kit says to use the red needle and the 165 jet for high altitude riding. I didnt see anything about other instructions, but it seems you have possibly improved his findings for our riding areas (basically= high country). Do you recommend making other jetting changes in addition to what JD recommends in his kit as I see you have done? I would be interested in giving it a shot if you can tell me how to optimize the use of his kit. Or maybe I dont need his kit????
Posted March 08, 2004 - 08:56 AM
Posted March 08, 2004 - 02:47 PM
Posted March 08, 2004 - 04:56 PM
Posted March 08, 2004 - 05:41 PM
Havin a good winter? Hey, with the jetting we run, my plug is still quite white. I know people here say it doesn't matter, but it does to me, I want to tan it up a little. Since you're a little leaner than me, what color is your plug running?
Also, I'd like someone with me thats done it before when I YZ time. Are you interested?
Posted March 09, 2004 - 09:37 AM
Posted March 10, 2004 - 06:14 AM
My spark plug is usually a light tan colored. I still have some issues in the winter with the thing fouling plugs and it's probably the Winter Gas. I was running the PMB insert and I'm now running the FMF Q so I need to richen it up a little.
I could probably help you with the timing. It's very easy to do. We'd just need to set up a time. I'm so damned busy right now with the 3 boys and work it's unreal so it's hard to do anything spur of the moment for me.
My dad bought a new CRF250X so hopefully I'll get to rail that thing soon and see if it's a bike I'm interested in getting next.
Posted March 10, 2004 - 06:34 PM
Thanks for the reply. It is very easy for me to do something like this spur of the moment, so I could accomodate your schedule really easy. Mainly, I don't have the small torque wrench required, i assume you do. So, I could have it all torn down if you can give me a couple hours notice some time, then we can just do the inside the head work. Sounds like you are quite happy with the change.
If you don't have time, don't even give it a second thought.
Still got my number? If not, I'll pm you.
Posted March 11, 2004 - 09:28 AM
There are instructions included in the kit for high altitude riding. The
exhaust has less impact than the altitude. Use the Red marked needle as
described in the #4 position, or #5 in winter. The main jet #168-170 in
winter, and higher up run the #165 to 9000ft and #160 when it feels like it
needs it, above 9000ft.
See the instructions for more details.
As this is my first summer with the JD kit, I'm going to give his advice a shot. Hope this helps.