DT125R ARCHIVE

maximus · DTR Member

5 wire servo on a 1992 DT ????

delicker · DTR Member

when you said you bought a kit is there somebody who does a kit or did you find all the bits yoursef,im going to close the powervalve,so the wife can learn to ride it,but im considering keeping it after for mysef to ride so a servo kits will be a must have

maximus · DTR Member

I bought it off a bloke who was selling an engine, so I just asked for all the powervalve and servo kit, got it for £50 so was pretty chuffed. I knew it a 5 wire servo but I figure it must be possible to use it.... somehow!

delicker · DTR Member

may be easier to get the wireing loom to go with the servo motor,might be an easier option

maximus · DTR Member

It turns out that the RD350 and TZR250 have powervalve controllers, which have a 2 wire connector, a 4 wire connector and 2 single wire connectors. This connects between the servo and the CDI and bobs your uncle, well not quite that simple! The RD have different timings to the TZR, I think the TZR is the one to go for. An alternative is to get a programmable powervalve controller, so the following link.

http://www.krazy-katt.com/engine%20management.htm

£150 is a bit too pricey for me! I'd have a go at making one if I could find out what was required.

maximus · DTR Member

Another alternative is to go for an EXUP controller, I've read a post stating the R1 controller works but I cant see why any EXUP controller shouldn't work.

I'll post again when I finally get a controller!

delicker · DTR Member

hi maximus i just got a servo with 5 wires as well 4 to a block connector and1on its own it was sold as it would fit mine,will it fit how are you getting on with yours,i thought i was just going to plug and play, now it dosent look like it

maximus · DTR Member

The difference is that the old servos had the controller built in, this is how they use only 3 wires, 0V, 12V and Revs. The newer DTs have the controller built in to the CDI so 5 wires go to the servo, 2 to the motor and 3 to the potentiometer for position feedback. Now as I posted earlier RDs TZRs and EXUPs all have a seperate controller which should work between the CDI and a 5 wire Servo. I've just bought an RD one off eBay so I'll find out as soon as I get it. I'm considering ripping the controller apart to see what makes it tick, with a view to making one from scratch. This way I could make one with adjustable set points. I figure 3 adjustments, start opening revs and fully open revs, with adjustable rate of opening perhaps. I'm guessing at the moment as I don't have one yet.

If anyone's got a faulty controller or servo they'd like to donate it would be much appreciated!

delicker · DTR Member

far out , my electrical ability is wireing a plug and replacing a lightbulb,its a black art to me,i can figure most things but electrics just faze me,at the mo im considering selling the 5 wire servo as i cant figure it out but will hang on,and see if you can.(sorry if that sounds rude but hey aint that what forums are about) good luck mate

delicker · DTR Member

im going to sell mine, as the wife aint going to be able to have it on her bike,untill shes used to riding it and passed her test,so i cant really see the pont in keeping hold of it till then,so its in the for sale section to anyone that needs it, i will keep it on there for a while for any member that can use it and then i will stick it on ebay, good luck with yours maximus i hope you get it sorted

delicker · DTR Member

i have found a lot of info on this on essex bikers forum,they have a 2 stroke page and on page 16 theres a post ypvs help with lots of info there but if you trawl through there may be what you need there or you could join the forum and ask they have a lot of experiance there from what ive read so far,hth maximus,..phill

maximus · DTR Member

Thanks for the tip, but I can't seem to find it on there, could you post a link?

Thanks

Maximus

delicker · DTR Member

sorry mate my computer skills are pretty bad im affraid,could try when my kids come over on friday,obviously on the 2 stroke section and i think there are 17 pages,and its on the 16th under ypvs help,but someone also mentioned about manually opening them using a cable off the throttle linked to a stepper motor,and that stan stevens used to do them for tzr250 and rd 350s. i will try and find this info for you today and point you in its direction.oh and i managed to get a 3 wire servo the other day of a balgrada will keep my eyes peeled for you

r0bsk1 · DTR Senior Member

Is this it?
http://www.essexbikers.co.uk/forum/forumdisplay.php?f=12&pp=20&sort=lastpost&order=desc&daysprune=-1

delicker · DTR Member

yep page 16 on ypvs help.but i dont know if it will help solve the problem you have,i think you can buy the brain to go with the servo from yamy but its 160 quid, but i cant see why a manually operated one couldnt work,straight off the throttle, now i couldnt work out how to do that but like i said earlier somebody has done it, maybe it is stan stevens, but i cant find the thread anymore, i will carry on looking tho mate

maximus · DTR Member

Finally got my YPVS fully functional! I've managed to buy a Servo from a 1995 TDR125 and that has the controller built in. So now my YPVS is fully finctional, but it actually make the bike feel slower as the powerband doesn't kick is quite as strong. The bottom end is much better and falling below 7000 rpm in top no longer results in the bike slowing down as it used to. So its faster but doesn't feel it!
If I was to aquire a DT in the future I'd just turn the powervalve round and remove the exhaust restricter, I don't think I'd bother with the YPVS kit! Although it is more civilised but perhaps thats the problem!
I still fancy making a controller, and now I have a spare 5 wire servo. null

rodeobob · DTR Newbie

Any more joy on this.

Ive got a DT200R and if i am right it has a 3 wire.

I have a controler here off a WR200 i bought with a few other bits and i was thinking i could use it.

Would there be any benifit??

I have 2x DT200R's a 1990 and a 91 model. One was missing the controller and quite a few other bits.
I have a third DT200R on the way.
Planning on making up 2 200's and the third rolling frame i was going to put an AG200 or DT175 motor in.

Bob.