Free DT 125

[wots]

[spikenipple]

Do you want a job lot of DT125 parts cheap? They're from the same model I'm pretty sure. I can get some pictures if you like. I only really wanted the engine but ended up with almost the whole bike and it's taking up space in my garage.

Forks - decent condition, minimal to no pitting
Yokes
Wheels/tyres/discs/rear hub
Tank
Plastics including new disc guards
Brakes (M/Cs, hoses, calipers)
Some parts of the loom, not entirely sure what
probably more bits......
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C50 > GN250 > XJ600 > SV650S K7 > 2001 RSV Mille R > MT-09, XR400R > 2005 Fireblade (trackbike) + 2022 MT-09 + ZXR400 race bike

[wots]

Absolutely, where are you?
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Currently: Yamaha DT 125 LC2,Repsol Fireblade, and Bumblebee MSX 125

[spikenipple]

Trowbridge, Wiltshire.
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C50 > GN250 > XJ600 > SV650S K7 > 2001 RSV Mille R > MT-09, XR400R > 2005 Fireblade (trackbike) + 2022 MT-09 + ZXR400 race bike

[wots]

[P.]

In that position, I want to say powervalve... but I'm unsure if the LC2 has a PV?

[misscrabstick]

electric power valve servo is my best guess.

[wots]

[P.]

Might be that switch.

One way to find out, ride it and see if you get a sudden kick in power. Pull over then flick the switch. If its different in the mid range onwards then you've found the magical switch for power

[wots]

[_Iain_]

On a 1987 DT it should be cable operated.

I'm looking into it in more detail at the moment, perhaps if I can figure out its part number then a google search will reveal more about it.

https://i.imgur.com/lgrAPvo.png

It would appear that the cables are supposed to be there...

https://static1.troca-se.com/uploads/items/2013/12/09/23/569685/6352a6555a0a7e8.jpg
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Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

[wots]

It looks similar to this, but this one has a cover, also from what I can tell the colours match, one of those cables is white/red Obviously wrong year, but you see what I mean.
https://www.ebay.co.uk/itm/YAMAHA-DT-125-4BL-96-99-POWERVALVE-SERVO-MOTOR-5-WIRE-IN-GOOD-CONDITION-/281212958391?pt=UK_Motorcycle_Parts_13&hash=item41799936b7

https://i1312.photobucket.com/albums/t525/wotsthestory/Bike/a13c7d23-27db-4c8e-873e-02e4d58b8845_zps66e46a05.jpg~original
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Currently: Yamaha DT 125 LC2,Repsol Fireblade, and Bumblebee MSX 125

[_Iain_]

Perhaps an aftermarket part designed to replace the original powervalve setup?

The box you link to should be mounted above the cylinder head, and has two cables that link to a pulley, which should be where that mystery component is!

Short term i'd rotate the powervalve to fully open and leave it, long term look at replacing the YPVS system on the bike - note that it appears to be missing it in the wheelie photo from the previous owner?
____________________
Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

[wots]

Lots of stuff arrived yesterday/today. Other things to arrive in the next few days. In theory everything to make it road legal (with some work), mostly genuine parts with some that are close enough.
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Currently: Yamaha DT 125 LC2,Repsol Fireblade, and Bumblebee MSX 125

[wots]

Thanks to Spikenipple above, just brokered a deal to collect the following on Saturday morning. Really chuffed.
https://imgur.com/a/GaVYb
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Currently: Yamaha DT 125 LC2,Repsol Fireblade, and Bumblebee MSX 125

[Fizzer Thou]

There was no power valve actuator fitted to my DT125LC Mk2 as it was a UK version restricted to 12bhp by locking the exhaust valve into position.I had the barrel off,cleaned everything up with some emery cloth after knife-edging the transfer ports,then locked the exhaust valve half open so as to give maybe 15bhp.With it fully open I was told it might give 20bhp but lose much of the bottom end power.

This is the tank that I have

https://i666.photobucket.com/albums/vv23/WiNot_Rhencullen/Snaps/Picture100.jpg
https://i666.photobucket.com/albums/vv23/WiNot_Rhencullen/Snaps/Picture101.jpg
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Just talk bikes.What else is there?

Always have a 'Plan B'

[P.]

[wots]

Tank looks fabulous and in the right colour too, I'll definitely have that off you.

Regarding the power valve, can the whole automatic system be retrofitted, rather than just the fix it open or shut affair.

There is an american guy who has literally stripped a YZ125 and it is so easy, so I might strip clean and powder coat. I wasn't going to do this, because a) I'm impatient and b) I didn't think I'd do a good enough job. It will look fabulous when finished though. Iain's CR hasn't taken that much to do.

Also, I have a swing arm with disc setup (and shortly to have another too) including everything back to the master cylinder and possibly pedal. Would you (could you) fit this or leave as is, on a bike like this I think the drum would be easier to maintain. However, if I changed to disc I'd have two rears with disc, so swap out to knobblies would be easy.
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Currently: Yamaha DT 125 LC2,Repsol Fireblade, and Bumblebee MSX 125

[P.]

I'm sure you could retrofit the disk stuff, unsure how rear caliper mounts so you might need to use the dedicated swing arm, Fizzer again is probably the guy to confirm. Bloody wizard

[Fizzer Thou]

You would have to factor in a mount for the rear master cylinder and a bracket for the reservoir.I would stick with the rear drum

https://i666.photobucket.com/albums/vv23/WiNot_Rhencullen/Snaps/2013-05-30200351_zps773b6b4e.jpg
____________________
Just talk bikes.What else is there?

Always have a 'Plan B'

[wots]

[Fizzer Thou]

You can see in Iain's pic above that the brake pedal pivot is in a differant position to the pic that I put up in my post above.

The caliper bracket mounts/slides on a fixture on the inside of the swing arm so would not need a torque arm.
____________________
Just talk bikes.What else is there?

Always have a 'Plan B'

[wots]

Master cylinder has a bracket on the frame, on the picture above. A non-starter then, drum it is. I prefer a rear drum on a small engine bike anyway.
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Currently: Yamaha DT 125 LC2,Repsol Fireblade, and Bumblebee MSX 125

[Nemo]

Late posting, still trying to get over iain touching me the whole way in the van...

Looks like you're cracking on with it, shouldn't be much longer till we see a video of it with the ktm and cr

and me siting on the side line like a pussy
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Previously owned: Kawasaki KH125, Suzuki GP125, Suzuki GX 125, Honda CB125 TDC '83, Honda ntv 600, Kawasaki ER5, Kawasaki ZZR600, Aprilia RSV 1000 Mille
Now own: Ducati 848 evo

[wots]

I'm certainly giving it a go. Which bikes/models use this engine? I was looking at an Athena 170 kit, and I've seen some pop up in Germany but they list as KTM 125 LC2/DT 125 and also Derbi (I knew about this one).

I'm just looking around at the minute, ideas etc. but a wider choice of compatible parts would help.

I was grass tracking the Monkey bike in someones back garden today, it was great fun, so now want to play with the big boys.

https://www.ebay.de/itm/Athena-170ccm-fur-KTM-LC2-Yamaha-DT-125-seht-guter-Zustand-/271387876910?pt=DE_Motorradteile&hash=item3f2ffa5e2e
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Currently: Yamaha DT 125 LC2,Repsol Fireblade, and Bumblebee MSX 125