LarryCO jetting EKP
Posted March 16, 2003 - 05:12 PM
I got a chance to test out the jetting with the EKP needle. It is awesome! I tested it at 8000 feet and there is absolutley no bog, no backfiring and no hesitation. The bike pulls in all ranges without any problems. My new settings are in my signiture.
Posted March 16, 2003 - 07:40 PM
What needle clip position and main are you running with at 8,000 feet.
Posted March 17, 2003 - 04:58 AM
Suggestion for ya...try clip position #3 and go up slightly on the MJ (say 155). Might run even better for ya, especially now when it's cooler. Should improve that midrange and top end even more...
In the summer (below 10K ft), I've been running a 150MJ and clip position #3 on that EKP...above 10K and I switch to the EKQ. See my sig for specifics...
Now all I need to do is to find some time to come ride with you... LOL
Posted March 17, 2003 - 05:53 AM
I'm running it at #2 clip position and 148 Main Jet (see signiture).
Posted March 17, 2003 - 08:41 AM
Posted March 17, 2003 - 09:20 AM
I was down at Texas Creek on Saturday with my dad. We had to leave a little early though since the radiator hose somehow got cut on his KLX. Were you there with the group with the two tone green Dodge?
Posted March 17, 2003 - 10:48 AM
Yes, that was us down there with the big red flat bed with the green dodge. What did you think of the area? Not the best area I have been riding in, but I think it's still better than riding Pueblo with all the junk people have been dropping out in the fields. There were alot of people down there that day, wasn't sure who anybody was.
Posted March 17, 2003 - 11:11 AM
Posted March 17, 2003 - 11:30 AM
Posted March 17, 2003 - 11:48 AM
Posted March 17, 2003 - 11:50 AM
I would have thought this would indicate a rich condition if you had to use the hotstart lever to start ...
Posted March 17, 2003 - 12:38 PM
Posted March 17, 2003 - 01:21 PM
If you're running a 38PJ/60PAJ, you're probably too rich using that P needle. Try a 65PAJ...or better yet, buy an adjustable pilot air screw from Sudco...and you can adjust it until it's right for you.
I believe that the needle DOES impact the pilot circuit, but only on startup/idle. It's the diameter of the needle (__P, etc.) that affects the pilot circuit. But again, given what you've described, you're too rich using a 60PAJ with that 38PJ and EKP...try a 65PAJ and go from there. Dont give up on the 38PJ...I've tested quite a bit and have found it to be MUCH BETTER than running say a 42PJ/75PAJ (stock on a '01).
Good luck boys! And may the snow's melt soon!
Posted March 17, 2003 - 06:41 PM
Also, I have the adjustable pilot Air screw, that's what I was calling the PAS. If I increase from a 60 to 65 on the PAS, wouldn't that allow more air in the mixture and leanout the pilot even worse? I wish I new of a place on the web were I can get a degree on carb theory and jetting mystisism ...
Could the YZ timing that I have done, changed any other setting that are needed? Just shooting in the dark here.
Thanks guys for all your help,
Posted March 17, 2003 - 08:23 PM
Posted March 18, 2003 - 05:05 AM
When you say you have a hanging idle, that means it's too lean to me and you'd want to turn out your fuel screw a bit to compensate (up to 2/5 turns out max). Although, if the ONLY way you can start your bike (hot or cold) is via hotstart, then that would tell me that your bike is too rich on the pilot circuit. Dont know what to say here, other than perhaps trying to yank off the vortip and seeing what that does. If your bike starts to run/start better with the 38/65/EKP, that's some more info to pass along to someone that may have the solution for ya. Also, if you turn the fuel screw all the way in, does your bike stall? It should. I'd also want to verify the number of turns out from fully seated that your PAS is set at. Perhaps you have the wrong # of turns out to equate to a 65PAJ...I cant remember offhand what a 65PAJ equates too...have it written down at home...might do a search online in TT to verify...
I'm putting more stock in the "cant start my bike even cold without the hotstart" description and am betting that you're too rich with that Vortip...and assuming all else checks out (listed above), I'd try a 38PJ/70PAS and go from there. If you try these suggested tests and dont resolve the problem, I'd post the issue under separate cover to make sure the "super guru's" see it...
Let me know how it turns out..
Posted March 18, 2003 - 06:45 AM
Larry, man you must be picky, , because I can't see how it could run any better? Starts first kick 99% of the time and I have little to no bog or hesitation 0-1/4 throttle. What do you mean by runs better? Thanks for the clarification.
PS. I have an aftermarket pipe.
Posted March 18, 2003 - 07:55 AM
You might be on to something here. When you remove that airbox lid and the baffle, you create a lean condition because more air is flowing thought the system. By introducing the Vortip into the equation, I richend the system again. I should be able to move from a 65 to a 70/75 on the PAS to compensate the the Vortip. I'll try it when I get home tonight. I would expect other people will have the same issue if they try your jetting if they purchase the new Yamaha insert from Gyr-t.
Thanks Again, I'll report back the findings later on, so if somebody else has the same issues, they'll hopefully find some answers in a TT search of the forum.
Posted March 18, 2003 - 11:09 AM
By "better", I mean that the bike feels more responsive (i.e. snappier) when blipping the throttle. I like this better than the "other camp" that believes in larger PJ/PAJ's. Seems to work better for me when trail riding and wanting to loft the front to clear rocks, logs, your friend who crashed in front of you, etc. Just a personal preference I suppose...
I admittedly have no experience in jetting changes required to support aftermarket pipes (i.e. your Vortip). I've only had an uncorked stock exhaust and have been too poor to go buy a different (quieter) pipe. So let me know how it turns out...as when I finally get my wife to stop buying pets and same some coin, I'll be getting one myself!