Yamaha DT 125 DERESTRICTING
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Hello! I have Yamaha DT125 1999 and I want to derestrict it. It has 16t front and 57t rear sprocket and top speed is just around 80km/h (50mph) and in 6. gear it revs up only to 6k rpms.
I have a problem with derestricting. I choose the method with black/green wire that is behind a speedo because I found it easiest, but I can not find any wire that looks like that... There is a mess with those wires and it has anlaser starter so that might be the thing why it is so messy...
https://i.postimg.cc/D8pRrbCy/1.jpg- wire that is going from speedo has 6 wires on top (not 3), and the same is on the bottom, and it has some wires that are not in that white block but none of them is black/green...
https://i.postimg.cc/SYyHrLFj/2.jpg
https://i.postimg.cc/SjyPHG3x/3.jpg
https://i.postimg.cc/tYRHtbpD/4.jpg
2. one is messy asf
https://i.postimg.cc/sQzLjP2K/5.jpg
https://i.postimg.cc/dDBb0frC/6.jpg- which I think that is supposed to be the one with black/green wire, have 5 wires on top and the same on the bottom and neither of them is black/green one…
https://i.postimg.cc/946xxdTC/7.jpg
https://i.postimg.cc/QHJRHy75/8.jpg
https://i.postimg.cc/FY854Jcn/9.jpg
https://i.postimg.cc/gwXSqSxg/10.jpg
And there is also this thing...
https://i.postimg.cc/phQgzGSg/11.jpg
Its quite a mess so can't really see wires...If anyone knows how to check which is rev limiter wire or something please help...
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@declan I did but there is nothing specific about reed switches... This is where I am at now.
https://i.postimg.cc/QB42SB8b/obanow.jpgIs the reed switch under the speedometer panel: https://i.postimg.cc/8Fz8hdSc/kmh.jpg
https://i.postimg.cc/2LxFSsT5/kmh2.jpg
https://i.postimg.cc/0b8h0xTc/kmh3.jpgor under RPMs one?
https://i.postimg.cc/Z98mcY9s/rpm.jpg
https://i.postimg.cc/YhQwkqRr/rpm2.jpg -
@Lukas55 https://yamahaclub.com/forums/topic/16405-dt125r-de-restriction/ This might be helpful
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Thanks for your advice. This is what I have under the clocks (pictures under the post) and I think there is no reed switch (maybe it is somewhere but I don't know how it looks), there are just some wires... There is a possibility that someone changed those wires and there is no black/green wire anymore... Please help!
This is under the km/h clock:
[url=https://postimg.cc/z32j7qCk][img]https://i.postimg.cc/z32j7qCk/kmh-2.jpg[/img][/url]And this is under the RPMs clock:
[url=https://postimg.cc/Thd7QkZT][img]https://i.postimg.cc/Thd7QkZT/IMG-20200922-141049.jpg[/img][/url]
[url=https://postimg.cc/QKdfttpF][img]https://i.postimg.cc/QKdfttpF/IMG-20200922-141100.jpg[/img][/url]
[url=https://postimg.cc/9rxvG303][img]https://i.postimg.cc/9rxvG303/IMG-20200922-141106.jpg[/img][/url]
[url=https://postimg.cc/dkBWwdTM][img]https://i.postimg.cc/dkBWwdTM/IMG-20200922-141115.jpg[/img][/url]
[url=https://postimg.cc/BLshrNbc][img]https://i.postimg.cc/BLshrNbc/IMG-20200922-141119.jpg[/img][/url]
[url=https://postimg.cc/WD0WYxN1][img]https://i.postimg.cc/WD0WYxN1/IMG-20200922-141356.jpg[/img][/url]
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https://dt125r.co.uk/topic/578/derestricting-guide
There is a guide on this forum already. Literally in the "derestricting" sub-forum.
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@Lukas55 it is hard to see the picture but it looks to me that just under the Speedo cable connector is the place where the reed switch was, maybe it's there but the wires are not. Try tracing the wires back it may be tucked away somewhere if it's already been done or you may just find the wires had been cut with no reed switch on the end of them (it looks like a glass fuse or bulb) now I understand they shouldn't be cut off because it could cause you problems with the way it runs so maybe that is your problem.
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@markus-w Thats what I thought, but there is no slot or anything where reed switch could be...
This is how it looks:[url=https://postimg.cc/7J0LL548][img]https://i.postimg.cc/7J0LL548/IMG-20200922-181715.jpg[/img][/url]
[url=https://postimg.cc/pmpL9cRJ][img]https://i.postimg.cc/pmpL9cRJ/IMG-20200922-181721.jpg[/img][/url]
[url=https://postimg.cc/FkZ2Gvgk][img]https://i.postimg.cc/FkZ2Gvgk/IMG-20200922-181728.jpg[/img][/url]
[url=https://postimg.cc/vDsTPvtG][img]https://i.postimg.cc/vDsTPvtG/IMG-20200922-181733.jpg[/img][/url]
That means there must be some cable but obviously its not black/green because someone changed wires and made mess...
Like there is no white block where wires are supposed to go...It looks like this:[url=https://postimg.cc/pmtsr4Dg][img]https://i.postimg.cc/pmtsr4Dg/IMG-20200922-193040.jpg[/img][/url]
[url=https://postimg.cc/RJHTVLqS][img]https://i.postimg.cc/RJHTVLqS/IMG-20200922-193042.jpg[/img][/url]
[url=https://postimg.cc/CBtNgQhr][img]https://i.postimg.cc/CBtNgQhr/IMG-20200922-193103.jpg[/img][/url]
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@DTR-NSR I am not sure but I think that 3 wires are coming out of servo...Markings on CDI are a little bit erased so it is not clear what does it say...
https://i.postimg.cc/vDXz2TwH/cc.jpg
https://i.postimg.cc/NK2k0x95/ccccc.jpg
https://i.postimg.cc/ns8Y9QBT/cdi.jpg
https://i.postimg.cc/RNDT9Y0k/cdii.jpgBtw what is bitsa'?
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@Lukas55 bitsa = bike made up from parts from several different bikes.
It sounds like your bike might have early wiring and cdi. I'd be checking the powervalve is in the open position and the exhaust has had the restrictions removed if it's a original yamaha one. Hard to make out much out from your pics. -
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@Lukas55 the black green wire comes from the cdi, but your bike will not have the black green wire. It's only found on later bikes 2004/5 onwards. I've got a feeling yours is running about 1998 wiring and cdi. The restrictions in the exhaust are in the front expansion chamber part.
