James Dean Carb Kit Installed ~ I Need A Little Fine Tuning
Posted August 10, 2003 - 12:30 PM
- kick started ok, would not elec start for beans
- lots of popping on decel
- stall off idle in neutral (not a big deal, just not right)
Installed the blue #3 and 168 main. all other setting stock.
Took it for a short ride, runs hard, all problems disappeared. starts nicely with electric start.
Posted August 15, 2003 - 03:51 PM
This might also be a good time to bring up to those just now rejetting to pay attention to the alignment of carburetor joint and the cylinder head projection. It's real easy to get these out of alignment and the carburetor would be mounted slightly tilted which might cause an entirely inaccurate jetting evaluation.
Posted August 15, 2003 - 05:32 PM
It's best to make 1 change at a time to keep track of what is making the change.
Your are exactly right about the adapter flange off the cylinder head. The carb port is off-center and will misalign with the cylinder head if the rubber adapter is rotated off the alignment notches.
Posted August 15, 2003 - 05:36 PM
Sorry for the delayed response. Yes, you can simply move to a leaner clip position to clean the jetting up in the 1/8-1/2 throttle range.
Posted August 28, 2003 - 02:40 PM
I run the power now and twin air filter with the same air box mod as you. The red needle in position #4 should be right I am slightly rich at position #5. 160 Main rocks! Carb needs to be level visually only. Dont worry about it to the Nth degree. I adjust my screw 1/8th turn at a time while riding it up and down the street with the side cover off the carb. Just remember where you started.
Posted August 28, 2003 - 05:00 PM
Posted August 28, 2003 - 05:26 PM
Posted August 28, 2003 - 09:17 PM
Yes, try a smaller main jet, maybe the #165, before a #160. It sounds like you're close to having a good setting for your conditions.
Posted July 15, 2004 - 01:18 PM
9-11k rock crawling (i.e., Rubicon trail)using the same JD jet kit with the blue neddle and 4th position, 1 3/4. I am stalling profusely and am feathering the clutch continuously. I have tried a bigger PJ, moving the screw position with no avail. Are these guys just not designed to chug over rocks? ANY ideas would be appreciated. All other power bands are GREAT!
Posted July 15, 2004 - 04:27 PM
Posted July 20, 2004 - 11:19 AM
I'll be testing the recommended jetting specs which say to run a 170mj with the blue needle. I'm running a stock needle now and a 162mj and it seems perfect on top. There's no elevation factor to speak of but I am running an FMF powercore 4 and a Powerbomb header. I think the header requires a leaner mixture for mj. Anyone have a suggestion? Does the blue needle enable you to run a richer main than would have been possible stock? Should I test the 162 mj or would it be better to go right to the recommended 170mj?
Posted July 21, 2004 - 04:12 PM
Posted August 02, 2004 - 06:07 PM
Posted November 11, 2005 - 01:56 PM
I have the following:
*White Borther E Series header muffler assy
*YZ Cam timing
*Gray Wire Mod
*Air Box Lid off
I had an '01 stock WR 426 before this and it was easy to start. This one is next to imposible to start. It fouls plugs left and right and is always a pain in the perverbial a**. I headed down to Terlingua, TX next week and would really appreciate some help. I am not the birghtest mechanic on the block, but I am willing to try anything to get this bike to start better. Once running this thing is an animal.
Environment is Houston, TX
*Usually hotter ambient temp than the sun
*relative humidity straight out of the sauna
Any help would be greatly appreciated