Deristricting the KLX and D-Tracker 140KPH

by **jonadda** » 03.02.2009, 19:53

A mate and i have finally nutted it out how to get around the restrictor on the KLX and D-Tracker and allows the engine to rev out in every gear early test have had my mates KLX doing 142 KPH alot better than the 110-115 KPH out of the box stockies. The main advantage is when you are pulling up a hill and drop back a gear or two that you can wind it out in that gear so it does'nt die in the arse when you upshift to the next, normally the restrictor doesnt let you get over 8,500 RPM in 3rd or taller our little find allows you to rev it right out to the rev limiter and its fairly strong all the way through the range. At this stage our find is only a day old and we intend on doing a lot more testing, so far the only down side to it is that the FI warning light comes on in excess of about 75 KPH and stays on until you turn the ignition off and back on again, so far this has not created any problem but we intend on giving it a good work out over a period of time before offering our services to other frustrated KLX and D-Tracker owners for a nominal fee.
Will keep you posted.
John

by **2wheels** » 04.02.2009, 19:31

Onya mate!
D-Tracker owner, so will follow your posts with great interest.

by KZ » 05.02.2009, 09:12

I'm also very interested! 140km/h is quite an achievement for a 250cc single in a dirt bike frame. My VTR250's V-Twin is supposed to make 32hp@10.500rpm and weighs 145kg, it'll hit 150 on a good day, but top traveling speed is 140km/h, according to the speedo.
It probably gets there a bit faster...
Keep up the good work and keep us posted!

by **jonadda** » 05.02.2009, 20:59

So far so good, but still have the warning light coming on but does'nt seem to create a problem so far, the latest addition is that we have wired in an aftermarket kill switch which allows you to run in standard mode or flick the switch and it by passes the restrictor, the engines best power is made in the 8,000 and up range and its quite a buzz when your trying to wind it out in say 3rd and reach the restrictor then hit the button and feel it take off, I set up another KLX today and the owner is blown away, by the speedo on his bike he hit 143 KPH.

by **jonadda** » 09.02.2009, 08:34

Seems like we have it now, we have found the solution to let the cpu believe that every thing is doing what it should be doing and the engine runs like a normal bike, iam a little concerned though how Kawasaki have done this, i feel that in the long term being restricted the way it is will only cause damage to the engine as it appears to me that when riding in the range where it is restricted you can hear the engine slightly popping so i feel they have done it by altering the ignition timing, anyone who has ridden one of these bike will know that when your riding flat out on an open road will experiance that you have absoloutly nothing on the throttle between 3/4 and full throttle, only a different sound of more air getting sucked in, this cant be good and would make the engine run fairly hot, it will be interesting to see whether or not some of these bikes that do a lot of long trips start developing burnt out valves or something, only time will tell.
John

by **patthai** » 17.02.2009, 22:53

Just bought a black D-Tracker and subscribing to this thread. Short impression on http://www.gt-rider.com/thailand-motorc ... html#30550

by **milf rider** » 18.02.2009, 14:39

Hi Guys

Jon and his mate have managed to crack the problem, NO F1 light and full power!!! Since his mate has derestricted my bike, (Jon was busy washing his hair) I have done over 2500km, The bike has had no problems and Kawasaki can not tell what has been done, even with their computer put on the bike!!

Good Work Jon not just a pretty face!

by **Davidfl** » 18.02.2009, 15:03

milf rider wrote:Hi Guys

Jon and his mate have managed to crack the problem, NO F1 light and full power!!! Since his mate has derestricted my bike, (Jon was busy washing his hair) I have done over 2500km, The bike has had no problems and Kawasaki can not tell what has been done, even with their computer put on the bike!!

Good Work Jon not just a pretty face!

Milf Rider
Good news to know you've got your bike fully sorted out + the news that John is not just a pretty face. (I always suspected as much.)
What's your indicated top speed now & does it have bottom end grunt, or just more top speed?
Now with 2,5000 kms up any chance of some trip reports & photos. We need more contributors, pretty please.

by **jonadda** » 19.02.2009, 09:21

To answer your question about grunt.
It just allows the engine to rev out in every gear, for the owners of these bikes they know that when you get into 3rd or higher the restrictor wont let the engine rev out much over 8,500, derestricting them lets the bike rev the same as it does in 1st and 2nd, hence greater top speed in every gear.
BUT i have been testing different pipe diameters and air box snorkels and have found you can vary the power curve to bottom or top end depending on the exhaust pipe diameter, still my tests are inconclusive but their is a marked difference, should have an accurate report in a week or so after some more testing, dont want to post anything without being absoloutly sure, i know how tough you guys can be on a bloke.
John

by **milf rider** » 19.02.2009, 11:38

Since I have had the power conversion I have been going between Phitsanulock and Chiang mia, A LOT hence such a large millage in such a short time, basically I am planning on relocating but that is quit a different story.

Basicaly the only ting that I can say of any interest about the route I take is, it is bloody cold at 6am in the morning and I will be buying some winter gloves, but morning riding is always special to me, seeing the sun come up and watching the animals moving around, saw a load of dogs getting it on in the middle off the road the other day quite funny but they make a hell of noise!

In a couple of weeks I am planning on going down south on holiday once I get my 12k service in CM and will be taking some interesting roads along the Burma boarder, basically I am going to tag the west of Thailand and then hit Phuket and come back up the east side of the country. ( I might do this the other way around). I will be happy to post some pictures and details as of this forth coming trip. If it is of interest to any one?

I think jon may be onto something and am looking forward to seeing the results!

Happy riding!

by **patthai** » 20.02.2009, 13:23

Great news Jonadda! Now, my problem is that I;m not living even close to CM (Koh Tao) and I would like to implement the solution too. Is there any way you could explain how to sort this restriction out? Looking forward to revving it up a little ;-)

Cheers!!

by **beddhist** » 12.03.2009, 01:36

๋๋John,

Would you please tell us how to de-restrict the bike? We are waiting with baited breath...

by **Fishenough** » 12.03.2009, 18:24

beddhist wrote:๋๋John,

Would you please tell us how to de-restrict the bike? We are waiting with baited breath...

Wish he would tell me also Beddhist; but would assume that Jon charges a nominal fee for the work on your bike and his knowledge - to cover the likely large amount of hours (and beer) spent trying to solve the restriction issue.

Well to be honest, know what his fee is................

by **beddhist** » 12.03.2009, 21:25

I would be happy to pay him, alas, he can't work on Su's bike as we are in Malaysia and soon in Indo. I can't afford to pay him to come down and meet us...

Cheers,
Peter.

by **nikster** » 17.03.2009, 09:34

I have a D-Tracker. I am in CM and would love to have this mod, especially if it comes with a kill switch.... when where how much?

That is.. OK, I will be back in CM in a month. I have fled the crazy pollution to the islands in the meantime, but my D-Tracker is back home and would be nice to derestrict her. I know exactly what you mean about the restricted feeling, it just doesn't sound or feel right what the bike is doing at about 85 - 90 Kmph and up. I _assume_ they did this to pass emissions tests?

I finally managed to get my racing-style helmet from Kawasaki so I am all ready to go. The difference in driving between this and the "moto-style" helmet that comes standard with the D-Tracker and the KLX is huge.

by **SUPERENDURO** » 30.09.2009, 23:30

Any more info on this, I am going to Thailand soon and was thinking of getting my hands on a KLX.

by **Fishenough** » 01.10.2009, 07:28

http://www.thumpertalk.com/forum/showthread.php?t=785180

That shows you how to do it yourself, I have about rode 6000-7000 since derestricting mine, or for 2000 Baht Jonadda can do it for you in Chiang Mai. Jon is easy to find in town, if he's not playing at the Guitar man he'll be playing at Riva.

It is quite simple, having since had a friend do so to a rental KLX.

Cheers,
Kevin

by **stubzi** » 29.01.2010, 03:46

Fishenough wrote:http://www.thumpertalk.com/forum/showthread.php?t=785180

That shows you how to do it yourself, I have about rode 6000-7000 since derestricting mine, or for 2000 Baht Jonadda can do it for you in Chiang Mai. Jon is easy to find in town, if he's not playing at the Guitar man he'll be playing at Riva.

It is quite simple, having since had a friend do so to a rental KLX.

Cheers,
Kevin

Kevin,

I've spent a bit of time reading through all the posts on deresticting the KLX / D Tracker including all the links to Thumpertalk etc. A few months have passed now since the last post and I was just curious to hear if everything is still OK after the re-wiring as I am purchasing the KLX250 next month.

Cheers,
Dave

by **Fishenough** » 29.01.2010, 06:48

No issues at all after 20,000 km's Dave. Just with derestricting and pulling the snorkel the bike pulls almost the same as one with a Juice Box and full exhaust.

Cheers

by **Ally** » 29.01.2010, 07:53

No problem here either - from a twice a month rider who needs more free time !! Grrrrrr or should that be Woof !

The snip & tuck method has not caused my bike to fail once, glad I got it done. Thanks Jono.

Ally

by **stubzi** » 29.01.2010, 16:20

Thanks guys, Looking forward to picking up the KLX next month!

Cheers,
Dave

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