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[monty]

nikster, on 2009-03-09 12:35:24, said:

I must say this sounds pretty convincing to me. When I listen to my bike, I can hear it saying "hey, I could go a lot faster right around the 4th - 6th gears". It does feel like an artificial restriction - most likely to pass strict exhaust laws...

So if I hear you right, your workaround just makes the bike rev higher than 8500 RPM? Up to how much? 10000? How does it affect fuel economy?

Nikster, it goes up to 10,000 RPM if you push it, in all but the top gear, but you wouldn't want to do that as the torque slowly tapers off above 9000.

With the device fitted, gear change seems to ideally be done just a tad above 9000, whereas before you were just wasting your time trying get it above 8000.

You get much better power in the 6500 to 9000 RPM band with the thing fitted.

On one of the most popular off road forums on the net was a thread since early November last year with Thai (and some Indonesian) KLX owners lamenting the lack of power. While owners in other countries all seemed to pleased with power, or if not had very easy options of increasing power/torque.

As it turns out most of the world gets this Kawa with a carburetor, with which it is easy to fiddle so to keep your inlet section in tune with whatever modifications you might do to the engine and/or exhaust.

In Thailand it comes with EFI, which on top of it restricts power above a certain speed by retarding ignition. Easily diagnosed as in first and second it would go straight to the redline, while in higher gears (read faster) it would completely fall dead at a tad above 8000 rpm.

I and some friends have been fiddling (exhaust, airbox...) with 1 bike before we had the device, and were simply not able to get much more out of the engine. Slightly better torque low end, but simply no high end power.
After we fitted the device, we actually are getting best performance with all the stock Kawa gear fitted!
For off road drivers, fitting a 13 tooth front sprocket takes just a little of the top end but increases torque on the wheel.

In short, my and my mechanic buddies have come to the conclusion, that with this bike what we get after the device is fitted, will be pretty much the most you'll get out of it, simply because the fitted injection system is not capable of injecting enough fuel to realize more power when you let the engine breath more through a better airbox/filter and exhaust system. You'd probably end up wrecking the engine though running lean!

I would love to know if you can just order Keihin injectors with a higher flow, much like Bosch and the other EFI producers. Now that would open up possibilities!

In the US they just stick a 300CC kit on it, bigger carb and exhaust and of they go. Which unfortunately with our injection system will be much more difficult to achieve unless we can easily (and cheap ) find bigge injectors then the stock fitted..

[stratosa]

Richard-BKK, on 2009-02-19 08:49:41, said:

For 2,000 Baht I would be very interested to know what this guy could do... Anything I can think of what brings more power to the engine costs more then 2,000 Baht

132 km/h for FREE

1. Disconnect ECU from the rubber base (A)

2. Locate the light green wire (

3. Cut the light green wire close to ECU

4. Add a piece of wire to the light green wire (that you just have cut) to the side that comes out of the ECU (E) long enough to reach (F)

5. Disconnect (F)

6. Connect the wire you added in parallel to the black/red wire (G)

7. Connect again (F)



Ready

Attached Files

•  klx2502009.jpg   318.99K   390 downloads

[gobs]

Thanks Stratosa, great tip!

Where do you find this? The writing is greek, no?
Is it on the web somewhere?..

Ah, at least, something for free!

Cheers,
Gobs

[stratosa]

gobs, on 2009-05-22 19:09:30, said:

Thanks Stratosa, great tip!

Where do you find this? The writing is greek, no?
Is it on the web somewhere?..

Ah, at least, something for free!

Cheers,
Gobs

The writing is in Greek but you dont need the writing
Just follow the english instructions looking at the pictures.
Is not on the web because everybody is trying to sell the derestriction.
Stratos
P>S I have been in Ching Mai twice.I love Thailand

Edited by stratosa, 2009-05-23 00:55:27.

[thaicbr]

Its pretty similar to the speed restrict on the cbr250 you can buy a box of tricks or just cut and reroute a wire. cut and reroute is so much cheaper.

[katabeachbum]

thaicbr, on 2009-05-24 00:40:05, said:

Its pretty similar to the speed restrict on the cbr250 you can buy a box of tricks or just cut and reroute a wire. cut and reroute is so much cheaper.

I have removed quite a few speed limiters 100 mph on us trucks, when importing them to Europe.
As I understand, this Kawa 250 LOS/Euro3/Calif restrictor does not allow full rpm in 4-6 gear. Just out of curiosity, does anyone know if this Kawa 250 wire reroute removes the gear info to the ECU or give a false gear (1-3 gear) info to the ECU? It really doesnt matter, since the orginal power now is released, but nice to know

[stratosa]

I think the restriction on KLX250 comes from speedometer not from gear info

[katabeachbum]

stratosa, on 2009-05-24 19:35:17, said:

I think the restriction on KLX250 comes from speedometer not from gear info

Thanks. Your probably right. The ECU doesnt need to know gear when manual. Anyway the power is released, and youv done a fantastic job sharing

[Aussiejon]

I have compared the Greeks method to our method and the difference he has not allowed for is the current coming from the green wire, he has diverted it back to the CPU, where we have components that absord that current and take it away, Im not too sure yet but their could be a chance over time that it might cook the CPU, thats what took us the most ammount of time perfecting our method was working out the right value of the components to avoid over heating the CPU. When we started out trying to derestrict these bikes we found a few different ways of doing it, some ways caused problems over time and cost us money (new CPUs)and the method we use now we didnt offer it out to anyone until we had over 3,000 klms of fault free riding, now with well over 6,000 klms still no problems and not one complaint from bikes we have derestricted. apparently going by the Thai D-Tracker web site some are having problems in second gear useing the CPU supplied by Kawasaki for 8,000 baht
John

[stratosa]

the current coming from the green wire, he has diverted it back to the CPU (Aussiejon words)

The green wire that tranfers the current to the CPU since you cut it stays loose. If with telepathy or other magic manages to reach the CPU you have discovered tranferring electricity without wires.
You can see it with letter (D) in the picture with the instructions i provided earlier

Edited by stratosa, 2009-05-25 14:53:38.

[KIFKIF]

Everybody happy?! Free or not Free...i'm still looking for buddies to ride around BKK ...

java script:add_smilie("","smid_16")java script:add_smilie("","smid_18")java script:add_smilie("","smid_35")

[pattayapip]

stratosa, on 2009-05-22 16:20:49, said:

Richard-BKK, on 2009-02-19 08:49:41, said:

For 2,000 Baht I would be very interested to know what this guy could do... Anything I can think of what brings more power to the engine costs more then 2,000 Baht

132 km/h for FREE

1. Disconnect ECU from the rubber base (A)

2. Locate the light green wire (

3. Cut the light green wire close to ECU

4. Add a piece of wire to the light green wire (that you just have cut) to the side that comes out of the ECU (E) long enough to reach (F)

5. Disconnect (F)

6. Connect the wire you added in parallel to the black/red wire (G)

7. Connect again (F)



Ready

Anyone tried this method on their Dtracker/klx ? Work ok or not ?
Cheers for any info

[Fishenough]

pattayapip, on 2009-07-15 02:48:53, said:

Anyone tried this method on their Dtracker/klx ? Work ok or not ?
Cheers for any info

1100 km done now on this simple wiring trick, no temperature increase in the ECU or rectitfier. No glitches, just ability to hit redline in the first five gears. I don't ride full out very much, happily keeping it under 6000 rpm at most times but highway travel.

[pattayapip]

Fishenough, on 2009-07-15 22:19:20, said:

pattayapip, on 2009-07-15 02:48:53, said:

Anyone tried this method on their Dtracker/klx ? Work ok or not ?
Cheers for any info

1100 km done now on this simple wiring trick, no temperature increase in the ECU or rectitfier. No glitches, just ability to hit redline in the first five gears. I don't ride full out very much, happily keeping it under 6000 rpm at most times but highway travel.

Thanks !! Out with the wire cutters later today

[pattayapip]

Works Great, Did it today and its a different Bike
Thanks

[outside20]

Can somebody who has done this to their own bike provide some better pictures for me. I am a little hesitant to do it myself and the pictures would help me with my confidence. Thanks a lot.

Edited by outside20, 2009-11-22 19:35:34.

[Japhrodisiac]

Please clarify :
Do you join the new section of wire that leads to the (F) connector to the ecu side or the cut wire side?
Thanks

[outside20]

Nobody must have the time to post some good pictures because they are all flying around on the modified klx's. Please, pretty please, post some good pictures.

[nikster]

outside20, on 2009-12-01 20:20:02, said:

Nobody must have the time to post some good pictures because they are all flying around on the modified klx's. Please, pretty please, post some good pictures.

No, they're out trying to sell the mod for 2000 baht...

When I had my D-Tracker, it somehow derestricted itself after the first service. Was a different bike after. Before the mod, the bike behaves just wrong in the upper gears, after, it behaves like a 250 should. Much, much better. It also uses more fuel, but hey, that's the price you pay. Used to get 28 - 30 km/l restricted, and then less than 25 unrestricted.

[iBkk]

Any updates on this mod ?

I hesitate between doing the "cut it myself" mod, the 8000B official box or the 2000 B made in Chiang Mai box.

Any real difference between these 3 mods ?

thanks for your help

[ttakata]

I know its off topic but who's gonna do a 351cc bigbore on their KLX250/DTracker?

Some guy did a 331cc bigbore with the Power Commander
http://www.thumpertalk.com/forum/showthrea...ht=big+bore+efi

Unless something sweeter shows up at the Motor Show (Yamaha WR250X please!) I'll probably get a DTracker later this year.
Naturally I want the fastest one possible but maybe one of you current owners is willing to try a 351BB for us right now.

[pattayapip]

iBkk, on 2010-03-22 04:14:22, said:

Any updates on this mod ?

I hesitate between doing the "cut it myself" mod, the 8000B official box or the 2000 B made in Chiang Mai box.

Any real difference between these 3 mods ?

thanks for your help

Bite the bullet get your wire cutters out spend 5 mins and its all done, no worries hassle free performance derestriction, i am still very happy with mine

[iBkk]

I finally did it !

Took me so little time and brought me so much joy !
Thanks Stratosa for the tip, i just made a quick test run, went about 130km/h very easily
This MOD is great, cheap and now i feel like i have a new bike !

[bikibias]

I just ordered my new performance ECU & regulator . The wire thing works fine and it's my plan B for any problems in the future . KLX 250s Greece!!!!

[Winds]

Would really like the guys details for the end mod on offer for 2,000 baht.

Can anyone let me know his details please.

Cheers Marc