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

400SM guys.. help please

Can someone please tell me how long the 400SM upside down fork is from top of cap to center of axle, fully extended??
would be greatly appreciated

THANKS
 
I couldn't measure perfectly without 10 minutes of moving stuff around in the garage so that I could get the DRZ on the MC jack but one-man with the fork fully extended it measures almost exactly 36" within 1/4" max.

Need it closer, I'll be working on stuff in the garage tomorrow and it'll be easier.

2006 DRZ400SM, btw.
 
That's great, thanks!!
and what I was hoping to hear...
I'm looking for forks for a project, and these are looking like they are the ones I want.

Thank you
 
Hey guys....im new to your forum, so someone may have already talked about this. But do anyone else have problems with you SM jumpin outta gear while up in a wheelie. Mine does it and my buddies does too
 
R1 throttle tube mod

I finally got around to doing the R1 throttle tube mod. I was in too much of a hurry to take pics but the ones that FrigginChi posted are representative.

http://www.bayarearidersforum.com/forums/showthread.php?t=227265&page=6

With an FCR39 the throttle rotation between fully closed to full open was reduced from about 83 degrees to 73 degrees measured with a degree wheel indexed by eye on the brake lever; from about 1/4 to 1/5 turn, 12% quicker. I'm pretty sure that the FCR requires more rotation to full throttle than the stock carburetor. I don't remember tweaking on the throttle throw until I swapped to the FCR.

I traced the stock throttle tube's shape onto a piece of clear packaging tape to make a template and used a die grinder with a carbide burr to trim the R1 tube to match the DRZ's stock tube.

The stop on the open cable side seems to just need to clear the cable housing fitting.

The clock was staring at me and the stop on the close cable side seemed less important to me so I was a little less precise with it. As a result, it is now possible for the throttle tube to hang up slightly on the housing after the throttle is forced shut, twisted with some force beyond it's natural closed position. No big deal but not 100% perfect.

The throttle tube is Yamaha part number 4YR-26240-02-00 which supercedes the 4YR-26240-01-00 cited earlier in this thread.

Before I ordered the R1 tube, I found that all DRZs seem to use the same throttle housing (57110-14D00) but the throttle tube for off road FCR equipped ones has a different number than the street (and green sticker?) legal DRZs. Those throttle tubes are 57100-14D11 and 57100-12D11, respectively.

The 14D11 was more than twice the cost of the R1 part and I read a post on Thumpertalk where some Aussie was complaining about the throttle pull being too long on a DRZ400E so I went with what is proven to work. That 14D11 part could be the magic no fabrication bolt-on, though.

Suzuki part numbers are from ronayers.com and may not jive with Suzuki part numbers.

Throttle tube PNs: 2004 Yamaha YZFR1 4YR-26240-02; 2006 Suzuki DRZ400SM 57110-12D11; 2000 Suzuki DRZ400E 57110-14D11; 2006 Suzuki DRZ400E 57110-14D11.
 

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Hey I was curious I just bought a 09 400sm and I was curious if there if anyway youcan take the exhausts spark arrestor out of the cap of the exhaust. Iwoud buy a new exhaust but I can't afford to buy it and jetting kit.
 
Drztard said:
Hey I was curious I just bought a 09 400sm and I was curious if there if anyway youcan take the exhausts spark arrestor out of the cap of the exhaust. Iwoud buy a new exhaust but I can't afford to buy it and jetting kit.
Click to expand...

You have to remove the end cap and punch it out or cut it off.
 
1.5 Gallon Stock Tank ??

Everything I've read suggests the DRZ's stock tank should hold something like 2.6 gallons. When I went riding this past weekend, I ran it out of gas and then drained the reserve. I barely made it to a gas station before it died, and then filled it as far as I could and it only took ~1.5 gallons.

Anyone have any insight on this? 85 mile range without jetting or exhaust modification seems unusually restrictive.
 
Jabbyknob said:
Everything I've read suggests the DRZ's stock tank should hold something like 2.6 gallons. When I went riding this past weekend, I ran it out of gas and then drained the reserve. I barely made it to a gas station before it died, and then filled it as far as I could and it only took ~1.5 gallons.

Anyone have any insight on this? 85 mile range without jetting or exhaust modification seems unusually restrictive.
Click to expand...

That sounds about right.

You probably still had some gas in it before you filled up.

As for range, it really_really_really depends on your weight and body shape.

I used to get around 70 miles before flipping it over to reserve.
 
Jabbyknob said:
Everything I've read suggests the DRZ's stock tank should hold something like 2.6 gallons. When I went riding this past weekend, I ran it out of gas and then drained the reserve. I barely made it to a gas station before it died, and then filled it as far as I could and it only took ~1.5 gallons.

Anyone have any insight on this? 85 mile range without jetting or exhaust modification seems unusually restrictive.
Click to expand...

You may have a plugged charcoal cannister...wheelies and overfilling cause it to plug w fuel and then you no longer have a tank vent: out of fuel.
To test open and close the fuel cap and it will start up. I hear some folks take the fuel vapor system off but can't confirm..........:teeth
I always got around 100 miles before hitting reserve...untill the fcr went on that is! :laughing
 
Jeffrey Jay said:
You may have a plugged charcoal cannister...wheelies and overfilling cause it to plug w fuel and then you no longer have a tank vent: out of fuel.
To test open and close the fuel cap and it will start up. I hear some folks take the fuel vapor system off but can't confirm..........:teeth
I always got around 100 miles before hitting reserve...untill the fcr went on that is! :laughing
Click to expand...
That really fits. I'll definitely look into this. Thanks!
 
do you know the right way to fill up a motorcycle gas tank? in other words... pull back the foreskin, stick the tip just barely in, and start pumping. if you stick it all the way in, you won't get a full tank.
 
Not my DRZ, but some new stuff installed:

Aprilia Mirrors--much, much, much nicer looking than stock!

2dhxuyx.jpg


SME Axle sliders with built-in rear stand spool. Super trick!

zv3ax3.jpg
 
What are the details on the Ape mirrors and how much did they cost?
 
sweet mirrors!!!!!!!!!!!

can I see the other side on the stand, how does it clear the axle nut?
 
Mortifer said:
sweet mirrors!!!!!!!!!!!

can I see the other side on the stand, how does it clear the axle nut?
Click to expand...

It clears it just fine.

BUT!!!

Due to some tolerances - as you saw with Cain's bike, the axle doesn't exactly slide out from the axle block. Remember, we had to pound it in. I didn't have this problem with my SXV or any other bike with the same SME sliders.

I'll have to take everything apart again and maybe dremel the inside of the block to create more clearance. :x
 
Back to the throttle tube mod.

With the older '05 R6 throttle tube and the '04 R1 tube. You had to trim a bit of the tube to fit, and to me the throttle wasn't that much shorter than the stock tube.

With Yamaha of San Jose's recommendation, I bought the '06+ R6 tube.

With the '06 tube PN# 2C0-26240-00

The tube fits without trimming, and the throttle is like 1/6th turn. Very quick.
 
Spoke too soon on the '06+ throttle tube. W/o trimming some of the tabs, I was not hitting the throttle stop on my FCR carb.

I had to trim a little on each side of the tube (as instructed earlier in the thread) -- adjust the throttle cables on the carb, in order to get WOT.

:)
 
We LOVE WOT, dont we!
 
stan23 said:
Spoke too soon on the '06+ throttle tube. W/o trimming some of the tabs, I was not hitting the throttle stop on my FCR carb.
p
I had to trim a little on each side of the tube (as instructed earlier in the thread) -- adjust the throttle cables on the carb, in order to get WOT.

:)
Click to expand...

So how much rotation now?
 
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