DT125R ARCHIVE

Bixkit56 · DTR Member

2006 dt125 white smoke

Calum122 · Guru

Wouldn't be a bad idea introducing yourself in the welcome section before just posting away.

If it's just had a top end rebuild then it will smoke excessively. Also the nature of two strokes is that they burn lots of oil and should smoke heavily anyway.

Bixkit56 · DTR Member

Cheers moderator. If I can find the welcome section I'll do so.

i know 2 strokes do smoke but not heavily to my knowledge. Always 4 strokes I've had.

dont see why plug is getting drowned aswell. Carbs have been overhauled and balanced.

Calum122 · Guru

That's true it got removed I forgot. But the general chat section just to say hello and a picture or whatever of your bike.

Balance the carb? Sorry I don't understand.

The oil is not driven from the the carb it's got a separate pump. Or at least it should. On the right hand side of the engine case above the clutch is a little cover that houses the oil pump.

It'll be driven from the crank and controlled by the throttle cable.

For that engine the correct oil pump setting can be found in this video:

http://www.youtube.com/watch?v=WwFUzgr2xnA&list=PL66C1264C7D6205BB&index=21

Bixkit56 · DTR Member

Whoever had the bike before me has disconnected the pump and removed the oil tank from under seat. It has to be premixed now.

I was going to reinstate it if I can find which pipe goes where and if it's working.

I'm confusing myself now aswell when talking about carbs. Used to 4 stroke. They have been overhauled. Obviously not balanced as it's a single carb.

Calum122 · Guru

Right yeah would be well worth reinstalling the oil pump.

If you have no oil pump then you will need to premix the oil at the correct ratio. If it's too rich then it will struggle to tick over and smoke loads on idle and revs.

Again this is what it's like running incorrect oil settings on my bike. This had a fresh rebuild so had plenty of oil down the cylinder and bottom end,

http://www.youtube.com/watch?v=UmYFiDssILI

Bixkit56 · DTR Member

Thanks again moderator. Videos have been useful. Do u have any videos of where tubes go/ come from for the autolube.

Also ypvs. On the metal bit it is 1 and 2 from left to right. Now where it connects above that the numbers are opposite way round and so is wires. Take it this is wrong.

The only thing is keeping the thing ticking over now till I get it run in.

Calum122 · Guru

YPVS set up correctly in this video.

http://www.youtube.com/watch?v=H9xssWGZvjw&list=UUUMcGZs5-uxMhvmpYoqPE5Q

No but I can tell you.

It goes from the oil pump to the inlet manifold. There is a little nipple on the inlet and it will go onto that.

Even my 4DL which was pumping in FAR too much oil ticked over. So I'm curious as to why it won't run.

You may have to adjust the air screw or see if the choke is on. I know that on the standard carb of a DTRE they WILL NOT start without choke. And then once warm after 20-30 seconds will keep stalling. So choke on for starting then removing.

If you're sure that it's got the right amount of oil then have a look at the carb settings. Make sure that tickover is nicely below 2K rpm. (Okay no RPM sensor on the DTRE) Try by ear so it's nicely ticking over but not cutting out. And that the air screw is 1 and half turnsout. A little more if it's struggling. Little less if it's bogging.

Bixkit56 · DTR Member

Yes ypvs is set like that but it's the other part at other end of cables I'm not 100% sure about as the cable that comes out number 1 is going to 2 above it.

Yes I have the tube still coming out autolube onto inlet. That's still there. So I take it the one I'm missing comes from tank that should be under seat.

I also have 2 tubes on carbs that don't see to go anywhere.

Calum122 · Guru

You get carb warmer pipes that come from the cylinder head to the carb.

And you will have overflow.

Bixkit56 · DTR Member

Yes they two are connected up.

One on left hand side of carb and one one on right.

Calum122 · Guru

If your YPVS is moving like that then that is all that matters. The DTRE only retards the YPVS but that is an ignition thing not a crossover.

Get the bike running before worry about that..

Bixkit56 · DTR Member

Well gonna get another look at it tomorrow and see if I can get the autolube bottle and get it connected.

Will try get it to run and tickover and take it from there.

Once again thanks for the help and hopefully ur suggestions will have it running Good.

Calum122 · Guru

Make sure you have the bottle on the inlet manifold too!

Bixkit56 · DTR Member

I thought bottle connected to pump and pump connected to inlet manifold.

Does it connect to mee than one place.

Calum122 · Guru

Sorry.

There is a special bottle that sits between the carb and the and the cylinder it goes into the inlet manifold. Just make sure it is there.

A bottle not to dissimilar to the one in this photo

Victor · Guru

have you try'd revving it before it cut's out, or using the choke?

Bixkit56 · DTR Member

Yes started it with choke, gave it some revs after about 20-30 secs it cuts out. Tried turning choke off aswell after started but doesn't make a difference.

Callum i have a look at bike n pic together. That carb is slightly different but get the idea.

Calum122 · Guru

Yeah that's my 4DL engine.

You won't have that boost bottle. You should have a 3ET bottle. And a mikuni carb.

Bixkit56 · DTR Member

Yes mikuni carb. Bottle under seat but missing. Gonna pick one up.

Calum122 · Guru

I have a 4DL boost bottle. The 4DL is identical to the 3BN bottom end which is what yours is.

You must have that bottle fitted if you're running the engine. Else you'll damage it.

That may be why it's not running.

There should also be a bottle on the carb boot. Don't start the bike if you're missing bottles. Your DT should have one as standard.

MDK · DTR Legend

1 question .

you keep saying bottle under seat ? what bottle under seat the 2t oil bottle is next to the fuel tank only thing under seat is air box and at rear water over flow bottle

Calum122 · Guru

Dtre the two stroke bottle is located at the rear under a panel which is pretty much under the seat.

Bixkit56 · DTR Member

Yes Callum that's where mine is meant to be.

At the back under seat or panel.

This is the bottle I'm talking about being missing. Will get a pic of engine later and post it up if I can.

Bixkit56 · DTR Member

Anyone know float height for carb as it's Defo an over fuelling problem. Start it and she dies 20 seconds later and plug is soaked.

also ypvs ain't activating when I conect battery.

ive attached a photo of carb. csn u tell me what the 2 blue and yellow pipes should be. This is just pipes I put on inlets to make it easier to see. Don't know what any should be.

Calum122 · Guru

Float height should be between 20-21 mm

Victor · Guru

The first pic is an overflow or something.

The 2nd pic is a breather?

Bixkit56 · DTR Member

I thought first one was an over flow.

But why would it have two breathers next to fuel inlet?

Thanks again guys got the help.

Calum122 · Guru

Carb warmer pipes they are. You take a feed from the cylinder head out to the carb.

Bixkit56 · DTR Member

No carb warmers are further up and connected.