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Old 07-22-2010, 04:40 PM   #1
bntmoore OP
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DRZ400S Altitude jetting

Hey guys, I just picked up a 2003 DRZ400S! I love it, bone stock, 2200miles and was owned by a 62yr old retiree, he never used it. Anyways, I am curious about the carbs flexibility and elevation, can it handle a ride over the Continental Divide with the jetting it has now? It has been jetted for 5000ish ft. If anyone knows a thread about this and can hook me up with a link that would be great, thx in advance, ps searched and nothing....
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Old 07-22-2010, 05:04 PM   #2
velosprocket
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Here is your man:

Sisneros Speed Works. Your source for everything DRZ 400,performance and fuel injection tuning.
Email SSpeedWorks@gmail.com for price quotes and general info.
303-351-2390

Eddie also hosts a forum page on Thumper Talk:

http://www.thumpertalk.com/forum/forumdisplay.php?f=64

He jetted my DRZ for Denver, I rode it all over CO and didn't change a thing. I'm pretty sure it was the stock jet too.
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Old 07-22-2010, 05:24 PM   #3
burque magoo
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Also read up on Thumper Talk about the airbox modification, you basically open up the intake on the top to get more air into box, and I think case guards are a must to protect the paper thin factory cases!

You're gonna love that DRZ!
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Old 07-22-2010, 09:07 PM   #4
bntmoore OP
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Quote:
Originally Posted by velosprocket
Here is your man:

Sisneros Speed Works. Your source for everything DRZ 400,performance and fuel injection tuning.
Email SSpeedWorks@gmail.com for price quotes and general info.
303-351-2390

Eddie also hosts a forum page on Thumper Talk:

http://www.thumpertalk.com/forum/forumdisplay.php?f=64

He jetted my DRZ for Denver, I rode it all over CO and didn't change a thing. I'm pretty sure it was the stock jet too.
Ok then I am assuming I am going to be ok because the bike was jetted for the same altitude as your bike, my question was the flexiblity of my current jetting set up, I want to do some 12,500ft trails and was wondering if I will be pushing it once I get past 10,000 ft, haha, I dont want to get stranded. I plan one doing the airbox mod along with many others but this weekend I am doing some camping at 12,500ft and want to bring the bike to explore not necessarily go nuts on it till I have some more bike armor. thx again for the link too, it was helpful.
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Old 07-22-2010, 09:39 PM   #5
oldmanb777
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I have an "S" also. Eddie is the man for jetting. The "factory" specs for high altitude will work fine, BUT, you need to get a good needle in there. So, get a jet kit.. Makes all the diff. Do the airbox mod, buy the JD Jet kit. You won't be sorry.
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Old 07-23-2010, 09:06 AM   #6
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Cool, thx again guys, I have a pretty long list of things I am going to do so I will put that jet kit towards the top, thx for the help!
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Old 07-23-2010, 09:10 AM   #7
Mike D
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One more shout out for Eddie.

Did the 3x3 airbox and jetting on my '06 S, and it runs flawlessly from Denver to Mosquito.

Good guy, good price/value, and a REAL good wrench.
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Old 07-23-2010, 10:36 AM   #8
ryanco
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Airbox Mod is Key

I have an '03 S model with stock jetting. Since it was starved for air in ABQ, I did the 3x3, and no jetting changes were even needed. I've ridden it up to 12K or so, with no problems. One of te benefits of the CV carb is that it seems to be a little more tolerant of elevation changes. Enjoi!
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Old 07-23-2010, 04:47 PM   #9
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I have a '05 400SM and IMHO the 3x3 mod is key to bringing this little bike to life.
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Old 07-23-2010, 04:55 PM   #10
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Well, I am gonna try it out the way it is (bone stock.... blah) and see how it is. Alot of friends were wondering why I didn't buy one that was already modded and I told them that I wanted to start from the stock platform to see how each modification affects the bike and its a good sense of accomplishment when your done . I think I would rather start from stock because the manual is for the ''stock'' bike and when I do my add ons I know how they all work and are used from installing them. I will probably be doing the 3x3 on monday and then go order a bunch of stuff at cost cuz I have a hook up.
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Old 07-23-2010, 06:02 PM   #11
Tilt2turn
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Ya know all the cool kids switch to the FCR carb...

http://shop.thumpertalk.com/product_...n_drzfcrmx.htm
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Old 07-23-2010, 06:59 PM   #12
burque magoo
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damn! I knew there was a reason nobody thought of me as one of the cool kids.........
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Old 07-23-2010, 08:27 PM   #13
Tilt2turn
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I hope you noticed the smilie

I bought a 400E this summer, so it came with the FCR slide carb. I wasn't shopping for the 'E' model specifically, but so far, I am very happy with the performance, especially off idle. It picks up cleanly and smooth. It was adjusted for this altitude before I bought it, and I have had it up to 12,900 ft. It ran well up high, minus a little loss of power.
Most of what I have read on the internet about this carb has backed up my experience, so I think it is worth considering.

Cheers
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Old 07-23-2010, 08:36 PM   #14
cdq3
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Quote:
Originally Posted by bntmoore
Hey guys, I just picked up a 2003 DRZ400S! I love it, bone stock, 2200miles and was owned by a 62yr old retiree, he never used it. Anyways, I am curious about the carbs flexibility and elevation, can it handle a ride over the Continental Divide with the jetting it has now? It has been jetted for 5000ish ft. If anyone knows a thread about this and can hook me up with a link that would be great, thx in advance, ps searched and nothing....
it will do just great !

you will love it !
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Old 07-23-2010, 10:14 PM   #15
bntmoore OP
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I thought that carb was pretty pricy unless you happen upon one in some kind of goodluck? Well 3x3 first then maybe the FCR.....
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