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

[vladi80]

DRZ newbie

finally got my hands on one. It's an 07 jsut under 3k miles, runs great even tho I might need a filter for the pipe since its toooo freaking loud. Chck it out.

 

[t.tinyo]

For those looking for the Thumper Talk FCR MX kit, they got 8 of them in today (see email below):


As of NOW, we have 8 ThumperTalk FCR 39mm Carb Kits in stock, ready for shipping. As you know, they are about as rare as a politician with common sense, so get em' while they last! Here's the link:

http://shop.thumpertalk.com/ProductDetails.asp?ProductCode=INT_KEIHIN_DRZFCRMX

You know you want that DRZ to be the wheelie machine you've been dreamin' of. Now's your chance!

We also have a limited supply of the same great conversion kit upgraded to the 41mm carb instead of the standard 39mm.

http://shop.thumpertalk.com/product_p/int_keihin_drzfcrmx41.htm

Have a great weekend!

ThumperTalk Store Team
http://shop.thumpertalk.com
1.866.6.SHOP.TT
1.702.940.7899

Why does it wheelie? Does it get more HP?

 

[Lonster]

The FCR add's a couple HP, but the reral advantage is the speed at which it accelerates now.
The stock carb is a 'vacuum' actuated carb, so no matter how hard you twist the throttle, you still have to wait for Wide Open Throttle until enough vacuum is generated to lift the slide all the way up.
With the FCR, it has an accelerator pump, so as soon as you twist the throttle to Wide Open, you have WOT.
MUCH better acceleration, better, faster response, more power.

Lonster

 

[Lunch Box]

The FCR add's a couple HP, but the reral advantage is the speed at which it accelerates now.
The stock carb is a 'vacuum' actuated carb, so no matter how hard you twist the throttle, you still have to wait for Wide Open Throttle until enough vacuum is generated to lift the slide all the way up.
With the FCR, it has an accelerator pump, so as soon as you twist the throttle to Wide Open, you have WOT.
MUCH better acceleration, better, faster response, more power.

Lonster

Yep, exactly right. The FCR significantly improves throttle response. At 270 pounds, this thing will still power right up in first and will come up in second with no clutch and just a bit of a weight shift. Essentially, it trades a bit of fuel economy for a few smiles/mile.

 

[Lunch Box]

finally got my hands on one. It's an 07 jsut under 3k miles, runs great even tho I might need a filter for the pipe since its toooo freaking loud. Chck it out.

I have a full T4 system on mine, and it is pretty loud. I do, however, have a slightly more restrictive tip than yours, from the looks of it. Here's a pic, I'll let you decide. Maybe it's just shaped differently.

 

[t.tinyo]

Yep, exactly right. The FCR significantly improves throttle response. At 270 pounds, this thing will still power right up in first and will come up in second with no clutch and just a bit of a weight shift. Essentially, it trades a bit of fuel economy for a few smiles/mile.

Do you use a 41 teeth rear sprocket?

 

[Onebadscot]

finally got my hands on one. It's an 07 jsut under 3k miles, runs great even tho I might need a filter for the pipe since its toooo freaking loud. Chck it out.

I picked up the same bike, 07 with the same t4 pipe. Yes it's hella loud. I wear ear plugs on long rides.

 

[Lunch Box]

Do you use a 41 teeth rear sprocket?

I am still running stock gearing, as I want to keep it as versatile as I can. If I'm stuck on the superslab for any period of time, I want to be able to cruise at 75 without the thing feeling like it's falling apart. Conversely, I don't want the gearing too tall to make it difficult to get around the tight twisty go-kart tracks, etc.

 

[RudefishMoto]

Recommended tires for SM

Ok so I am burning through my stock Dunlops, any suggestions on a good tire for 400SM's? I commute mostly on the freeway and occasionally do some back road twisties w/ an occasional long distance ride. As far as percentage I do 80% commute, 15% twisties, 5% long distance.

rude1

 

[RudefishMoto]

Here is the setup on my '07: 3x3 mod, stock filter, Yosh RS2 CF full exhaust, JD jet kit (needle 2 position, pilot 1 size up, 150 main, 2 1/2 on air screw)

Can somebody post the very basic mods? Like jetting settings, 3X3 airbox mod, popluar exhaust choices, etc?

 

[Lunch Box]

Ok so I am burning through my stock Dunlops, any suggestions on a good tire for 400SM's? I commute mostly on the freeway and occasionally do some back road twisties w/ an occasional long distance ride. As far as percentage I do 80% commute, 15% twisties, 5% long distance.

rude1

There are a lot of different ways you can go, but I have been pretty happy with a combination of a Maxxis rain tire (6117?) on the front and a Bridgestone BT-016 on the rear. The front is nice and sticky, and handles crappy roads and smooth pavement very well. The rear is nice because it is a tri-compound tire. Essentially, the middle is hard (longevity for commuting use) but the outsides are softer, for the twisties. It's not perfect, but I like it.

 

[RudefishMoto]

Whats a good set of tires for the drzsm?

What are you using for your SM? I can find front tires but the rears are difficult because of the size. Anyone have good experience on a particular brand tire combo?

rude1

 

[reynolds_brad]

Has anyone on here done the O-ring mod and removed the pilot air jet on their FCR's? Ive been reading about this on TT and its said to get rid of some of the hesitation seen with the FCR's running on 440s. I was thinking of doing this to mine and play around fine tuning the jetting a bit more this weekend. Idle isnt quite as smooth as i would like still.


TT O-Ring mod post link.


Just wondering what others experiences have been with this set of mods.

 

[Lonster]

I did it on a buddies FCR, and it DID make a positive difference.
You have to remember though, this only works on the 'newer' FCR carbs. I have an older one on my 2006 (bought the carb in 2007), and it doesn't have the same PAJ as the 'newer' ones.
Somewhere in the TT discussion, there is a way to tell if you have a newer one or an older one.
But it DOES make an improvement.

Lonster

 

[Lunch Box]

Has anyone on here done the O-ring mod and removed the pilot air jet on their FCR's? Ive been reading about this on TT and its said to get rid of some of the hesitation seen with the FCR's running on 440s. I was thinking of doing this to mine and play around fine tuning the jetting a bit more this weekend. Idle isnt quite as smooth as i would like still.


TT O-Ring mod post link.


Just wondering what others experiences have been with this set of mods.

I did it and the results were VERY favorable. As has been said, this only works on the newer ones (I think ~ '05 and newer, but not sure on the year)

 

[stan23]

What are you using for your SM? I can find front tires but the rears are difficult because of the size. Anyone have good experience on a particular brand tire combo?

rude1

A super sticky rain front and a decent street rear is a good setup for Sumos. I ran this combo on my Husky SM610, DRZ, and SXV with great results.

Matter of fact, I have some sticky Pirelli SuperCorsa SC2 take offs in the 160 size that I am trying to sell. Yes--the Pirelli 160 rear will fit the DRZ with no problems.

 

[slydrite]

Ok so I am burning through my stock Dunlops, any suggestions on a good tire for 400SM's? I commute mostly on the freeway and occasionally do some back road twisties w/ an occasional long distance ride. As far as percentage I do 80% commute, 15% twisties, 5% long distance.

rude1

My recommended tire for commuting would be on a totally different bike.

 

[nadrojp]

My recommended tire for commuting would be on a totally different bike.

oh, you are sooo negative.... some people enjoy being blown around like an off screen porn star, and hearing their motors clock ticking away as the miles pass.

 

[RudefishMoto]

Hell yes!

oh, you are sooo negative.... some people enjoy being blown around like an off screen porn star, and hearing their motors clock ticking away as the miles pass.

 

[RudefishMoto]

The 160 fits with no troubles? Send me some photos of the tires and were they on the track is that why they are takeoffs?

A super sticky rain front and a decent street rear is a good setup for Sumos. I ran this combo on my Husky SM610, DRZ, and SXV with great results.

Matter of fact, I have some sticky Pirelli SuperCorsa SC2 take offs in the 160 size that I am trying to sell. Yes--the Pirelli 160 rear will fit the DRZ with no problems.

 

[stan23]

The 160 fits with no troubles? Send me some photos of the tires and were they on the track is that why they are takeoffs?

A Pirelli 160 fits beautifully, whereas I could not get a Dunlop 160 to even clear the swingarm.

Yes, they are from my racebike. I change rear tires every race weekend, they typically go through one practice day (4 sessions with 5 laps), and 2 sprint races.

If you're interested, come by and take a look. I believe I live near you in West San Jose. I'm right on Williams/San Tomas.

 

[UKtech1]

Check out the latest (and greatest?) upgrade for your DRZ400SM, the Evolution DRZ Triple Clamps.

 

[Mortifer]

This thread rocks, but needs more links and info in the first post, I'll add some later.

Funny I clicked this and forgot it was all about MY current bike I bought from Stan.

Thanks again Stan, I've loved every minute on this DRZ!!!!arty

Due to the popularity of the DRZ-400SM and the amount of people riding, buying and modding them, I decided to merge a few good informative threads into this "DRZ-400SM Ultimate Thread". I hope this helps many and if you have new info, please post it here! Thanks and ride safe!

-Dion

********

Hi All,

I just picked up another DRZ400SM (3rd one!) and this one is bone stock...

I actually bought this bike to race next year in the AFM 250P class, but I would still like to be able to ride it on the street. The bike is an '05 Yellow/Red model and has 800-miles. It's practically brand new. I specifically choose the '05 model as current rules allow unlimited motor mods, but no big bore, and stock carb/airbox)

Here are the current mods:

Renthal Fat bar kit
Acerbis hand guards
Yoshimura RS-2 full exhaust system
FMF Jet kit
Goodridge SS brake lines
EBC HH pads

-

My next step is to remove the front forks and have them revalved/resprung, but other than that, i'm not sure what else to do. Cams? E-model base gasket? Ceramic bearings? Lighter flywheel? Anyone know how to make a 'good' looking belly pan for this bike?

I got the bike for a song, so I have a bunch of cash left over to do some motor mods. What do ya'll suggest?

 

[Lonster]

Check out the latest (and greatest?) upgrade for your DRZ400SM, the Evolution DRZ Triple Clamps.

I purchased a set of the Evolution DRZ triple clamps, and told Rob that I would post some feedback.
First, the quality is SUPERB! Great looking, easy to install, and makes the bike look even better than it already does.
I have ridden many of my regular roads with this new setup, and I must say that it DOES turn better, faster, and transitions easier than with the stock setup. Initial turn in is easier. As you counter steer more, the bike wants to just drop right in to the turns, much the same way a well setup sport bike does. No coaxing or extra effort needed. Just look left, counter steer, and there you go! The bike is very stable under braking while leaned over as well. You can continue to scrub off speed with trail braking, even in fast sweepers, and there are no adverse reactions from the bike. All in all, I really like this upgrade.
Now, on to the mechanical / install side of things. Nothing bad here either, but there are some things that must be mentioned.
First, My thought on having the steering stem pressed out from your stock lower triple is this: LET ROB DO IT, and pay the extra money!
I say this because unless you have a very competent machinist on your salary, it will be next to impossible for you to do yourself without destroying your bottom triple. Enough said.
Next, if you are using an aftermarket, oversized gas tank, this setup WILL make contact with the tank before it gets to the steering stops. I use an IMS 3.2, and the upper triple contacts the tank. This ONLY happens on very slow, very tight turns. No biggie, in my book.
Also be aware that the headlight shroud (plastic piece) will only use the two side mounts after installation, because the relocation of the upper and lower triple makes using the lower shroud mount un-necessary. I just clipped the plastic 'tang' off the bottom of the shroud, and mounted it with the side mounts. No Problems.
I did have to remove my GPR steering dampener, as it will not work with this setup without some sort of modification. But Rob tells me that the SCOTTS 'sub mount' bolts right up to the upper triple, no problem.
Finally, if you are using the stock front fender, you WILL need to remove (cut off) some of the back of the fender, so it will clear the radiators. Remember, with these triples, the forks are moved back and in, so trimming the fender is necessary. How much you need to trim will depend on your bike and setup. I also use the 'Uni-biker' radiator guards, so these interfere with the un-trimmed fender as well. Trim accordingly.
I will be doing a SuperMoto track day at Prairie City on August 21st, and will report back on my feelings about the performance improvement of these triples after that. Having already ridden most of my favorite roads with these triples on, I can tell you that they will really improve my lap times as well as my ease of navigating the track at higher speeds.
I give this product 2 thumbs up!

Lonster

 

[POTTER]

This thread rocks, but needs more links and info in the first post, I'll add some later.

Funny I clicked this and forgot it was all about MY current bike I bought from Stan.

Thanks again Stan, I've loved every minute on this DRZ!!!!arty

Holy #@$% thats awesome, diving through the creek. Where is that?