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The Ultimate DRZ-400SM Thread - Mods, Tips and Tricks

This is the TRUTH!

d975f718.jpg
 
Bike is coming along.. Going through my suspension options now. I've already spoken with Ray Perez regarding setting up the bike, and for the price, it sounds like a real good deal! I've also outsourced an Ohlin's rear shock, and I may put that on this weekend.
 
stan23 said:
Bike is coming along.. Going through my suspension options now. I've already spoken with Ray Perez regarding setting up the bike, and for the price, it sounds like a real good deal! I've also outsourced an Ohlin's rear shock, and I may put that on this weekend.
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Rays a great guy. :thumbup

Im interested to hear the outcome of his work on the DRZ.
 
reynolds_brad said:
Rays a great guy. :thumbup

Im interested to hear the outcome of his work on the DRZ.
Click to expand...

Hey Brad, i'll probably just go with him. I was somewhat concerned about internally lowering the fork and shock, since this will still be a street bike, but he said it should be fine for street duty.

Also have an R6 throttle tube coming :)
 
Can somebody post the very basic mods? Like jetting settings, 3X3 airbox mod, popluar exhaust choices, etc?
 
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:cool 'Grats, Stan! :thumbup

Mo' reasons to go to AFM races next year! ;) :party

:teeth

Yana:banana
 
I've mentioned this in other posts, but this seems like the place to post it again.
The 2003/2004 R-1 throttle assembly is an easy swap (10 minutes), a cheap buy ($13.00 or less) and a BIG improvement in throttle operation. It makes your bike get to FULL throttle with less rotation, so you don't have to re-position your hand during full on/full off throttle transitions.
We have done this mod on the DRZ-SM, a KLR650, my wifes EX500, and many more. You will be amazed at how it transforms the throttle action of your bike.
(Don't do this on your liter bike! They have too much power, and don't need any extra help!)
My 2005 SM has FCR39MX, full Yosh stainless, 3x3, canister delete, more.

Have fun!,

Lonster
 
Lonster said:
I've mentioned this in other posts, but this seems like the place to post it again.
The 2003/2004 R-1 throttle assembly is an easy swap (10 minutes), a cheap buy ($13.00 or less) and a BIG improvement in throttle operation. It makes your bike get to FULL throttle with less rotation, so you don't have to re-position your hand during full on/full off throttle transitions.
We have done this mod on the DRZ-SM, a KLR650, my wifes EX500, and many more. You will be amazed at how it transforms the throttle action of your bike.
(Don't do this on your liter bike! They have too much power, and don't need any extra help!)
My 2005 SM has FCR39MX, full Yosh stainless, 3x3, canister delete, more.

Have fun!,

Lonster
Click to expand...

Hi Lonster, based on your post and others recomendation, i've ordered an 03 R6 throttle tube (same thing?) for my DRZ. I'll give the full report once it gets here. Did you have to trim the end of the throttle tube during install?

I also think a must have for the SM bike is the Acerbis SM fender. It makes freeway riding much more comfortable, as the stock fender is large enough to create some good drag. The only drawback to the Acerbis fender is that it will fling more water towards you.
 
I'm going to do the throttle mod as soon as my motor is broken in with an oil change and valve clearance check.
 
I believe the R-6 throttle tube is NOT a 1/6 turn, like the R-1 is. I have no experience with the R-6 throttle tube, so I cannot comment on whether it will work or not.
I know that the R-1 tube does work, and is priced accordingly. You may want to change your order or just be aware that the R-6 may be different.
I'll post a pic of my install later today.


Lonster
 
Lonster said:
I believe the R-6 throttle tube is NOT a 1/6 turn, like the R-1 is. I have no experience with the R-6 throttle tube, so I cannot comment on whether it will work or not.
I know that the R-1 tube does work, and is priced accordingly. You may want to change your order or just be aware that the R-6 may be different.
I'll post a pic of my install later today.


Lonster
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Thanks for the info again. I will try to change my order, but if not, i'll just keep the R6 throttle tube as my spare (I have an '05 R6 as well) I guess, if I get bored tonight, i'll just swap the throttle tube from my current R6 and try it out.

Which year R1 did you get? '03 and '04 bikes are completely different.
 
Here you Go!
 

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:cool Stan!
Sounds like a fun way to get into racing.

Let me know how the fork work goes, mine needs it bad since the weight loss program is apparently inoperative:laughing. Race Tech sells the tools so I think I may just do the spring (and possibly valve) swap myself.
 
(Someone asked, so here you go)

Jetting Settings:
Bike: 2006 DRZ400sm
Exhaust: Yoshimura RS-3 slip-on w/ FMF stainless header.
Smog stuff: Removed
Airbox: Snorkel removed, but no 3"x3" hole cut.
Altitude: 0-2000ft

Main Jet: 125 (Factory Pro: Note! This is different than other main jet sizes!)
Pilot Jet: 25 (stock)
Needle: Factory Pro, 3rd position from the top w/ all stock spacers.
Fuel Screw: 3 turns out
Carb: Standard non-FCR carb.
Result: Fantastic low end, power wheelies all day, near 100mph top end and solid mid-range.


Suspension Settings:
Bike: 2006 DRZ400sm
Rider Weight: 185lbs with gear.
Suspension: Stock.

It should be noted that suspension settings vary different based on what you want the bike to do, your style and just overall preference. You may want to use this as a starting point and fine tune from here on.

REAR SHOCK
Race Sag: 2 3/4" (I don't jump, so I wanted a little less than normal sag to help turn in)
Static Sag: 3/4" (stock spring)
High speed compression: 4 turns out
Low speed compression: 14 turns out
Rebound: 4 turns out

FRONT FORKS
Compression: 16 turns out
Rebound: 6 turns out
Fork Height: Raised ~12mm (all the way to the 2006 bars).

RESULT: The bike handled fantastic in the twisties. Did not drift wide mid corner or fail to turn in. Contrary to popular belief, I did not lose any stability by raising the forks. The suspension was supple enough to handle all hard bumps (dirt even) and more importantly, that annoying bounce of concrete freeways we ride on!
 
Wow, lots of good info here! Tomorrow I'll head to my Suz/Yam dealership and order a throttle tube and some new caliper bolts!
 
Jeffrey Jay said:
:cool Stan!
Sounds like a fun way to get into racing.

Let me know how the fork work goes, mine needs it bad since the weight loss program is apparently inoperative:laughing. Race Tech sells the tools so I think I may just do the spring (and possibly valve) swap myself.
Click to expand...

Jeff,

My forks and shock are out to get a full treatment at www.evolutionsuspension.com

suspension.jpg


I get my bike back in a week, and i'll report my findings. I'm going to revalve and respring both the forks and shock.

Tonight, I installed my new 520 non-o-ring chain and little things here and there. I can't wait to get my bike back in a week or so.
 
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