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Old 03-26-2009, 08:44 AM   #1
oldmanb777 OP
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Question DRZ jetting

For those inmates who have a DRZ-400 "S" model, with the Mikuni CV carb. What is your sweet spot for jetting. What has worked for you in our Colorado changeing altitudes and temps.
Mine is stock, except for the 3x3 airbox mod. I bought the JD dyno jet kit.
The results were amazing, but too rich with the #25 pilot jet as the kit suggested. But the upper end is great with the #150 main jet and 4th clip position.
So what has worked for you, and are you stock? (Pipe,etc).
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Old 03-26-2009, 09:04 AM   #2
wzd1a
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I recently did the 3x3 and jetting with the JD kit - went per the JD instructions #145 JD main, #25 JD pilot, but I'll have to look up the clip position I used - I think I deviated here... 4th position or 3rd can't remember.

This really woke up the bike that's for sure. Bike is stock in all other aspects.

I found my info. http://www.advrider.com/forums/newre...eply&p=8960697

Quote:
Originally Posted by wzd1a
I bought the JD kit for the 36 mm mikuni. I installed the red marked needle #4 clip position (4th from the top). Installed the 145 main (per JD for riding over 8k ft) and replaced the stock pilot with the JD # 25.

My only deviation from JD's instructions was to set the clip at the 4th position instead of the 3rd.

Just got back from a test run over 8k ft and the bike ran flawlessly.

wzd1a screwed with this post 03-26-2009 at 09:25 AM
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Old 03-26-2009, 10:40 AM   #3
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I don't own my DRZ anymore, but I did the 3X3 mod with the DynoJet kit following Jesse's recomendations for jetting (sorry I forgot the specifics at this point) - running into a FMF Q2 S/A - It did give it more grunt...if only it wasn't so darn heavy though! :-)
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Old 03-26-2009, 04:53 PM   #4
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I did the 4000-8000 ft recomended jetting of #25 pilot, and #150 main, red needle, 4th clip from top. It was great in Moab untill I was trying to work my way through tight sections, at low rpm almost lugging it. Then it loaded up and flouded. So Eddie AKA Burned said the #25 pilot would be way too rich. The other option is the 22.5 pilot. But what will the 150 main do with that pilot at altitude this summer. Will moving the clip o]=position to a leaner position work, or will I need a leaner jet?
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Old 03-26-2009, 09:41 PM   #5
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According to my notes, my KLX400SR (green DRZ-S), with stock carb, stock exhaust, 3x3 mod, and foam air filter has:
128 main jet
22.5 pilot jet
air screw 2 3/4 turns out
Dynajet needle, with the (weaker than stock) spring, clip on 2nd notch from the top.

It runs well from 5000 ft to 12,000+.

I would do what Eddie Sisneros says. If you have the $, bring it to his shop on East Colfax and have him dyno tune it.
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Old 03-27-2009, 06:20 AM   #6
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Quote:
Originally Posted by murgatroid42

I would do what Eddie Sisneros says. If you have the $, bring it to his shop on East Colfax and have him dyno tune it.
+1 on Eddie. If you are active on Thumper Talk he will usually do it for free or at greatly reduced cost, at least that is what I have seen him say a few times. I need to test that out this suummer

I can't remember what I exactly I have for jetting, I want to say a 150 or 155 main and 22.5, air screw out 2 turns and clip in 3rd position. I tried the 128 and it was way lean surging and cutting out really badly. That was with the 3x3 and a drilled out stock pipe. I just put on a full yosh so I need to do it all over again as soon as the snow goes away
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Old 03-27-2009, 03:22 PM   #7
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+1 on Eddie. He has been a help on several issues. Guess I never even thought about taking it down to him for some dyno work. It's been so long since I had any work done on anything, cars, houses, bikes airplane, etc that I never think of having it done It's usually the other way around, someone bringing something to me to fix or redue. But I certainly don't mind asking for advice, and taking advantage of others that have more experience in a certain feild. It's the aircraft training I guess.
I know Eddie seems to not like the big #25 Pilot, especially at altitude. Told me that was way too rich. But that is what the JD kit recomended.
I am just currious what combinations others have found that they like.
I'm guessing a good compromise for here will be 22.5 pilot, #145 main on a mid clip. might be a little lean in Moab, and a little rich on Mesquito Pass. But much much much better than stock.
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Old 03-27-2009, 08:37 PM   #8
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Quote:
Originally Posted by oldmanb777
+1 on Eddie. He has been a help on several issues. Guess I never even thought about taking it down to him for some dyno work. ...
Eddie did not work on my bike (although he did dyno it for the previous owner - long story), but I know some local ADVRiders who are very competent mechanics, but they brought their bikes to Eddie to tune it. It cost some $ but they were very satisfied with the work. YMMV.
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