DT125R ARCHIVE

Reef · Guru

RE: CARB PROBLEM, BIGGER PROBLEMS :/ HELPPP

Reef · Guru

Ok so another annoying update :/

So the plan was today to adjust the air screw right, well both carbs air screws are stuck in there due to both heads being rounded off before and I guess they may be seized in there as well :/

So the question is how easy is it to drill them out and replace one with a brand new screw??? I just took it to a mechanic who I know of and he said that's it really tricky to drill out a screw??

If that's the case I guess the easiest option would be to get someone to drill it out but who?? Can you think of a proffession (word i should be using lol??) which is found in most places which will find it easy to drill it out so that I can add a new one

I'm thinking it may be a bit more expensive and time consuming but to post in the wanted section asking to all known and trustworthy members if they wouldn't mind having my carb sent to them for say a fiver to drill out my air screw (that's if they've done it before) on one or both of my carbs ;) and then send it back asap in a prepaid package. (I'm presuming its a quick job for someone which has done it before)

Any suggestions would be appreciated

Thanks

Maybe one day ill have this sorted ;) bloody dep

toadymc · DTR Respected Member

F-cks sake mate people not using the right tools realy ****'s me off! especialy when its screwdriver or allen key. is it completly rounded off?

Reef · Guru

Ar ok nev cheers, will do, I know of another mechanic which is always repairing dts owned by chavs so ill go in there, he's probably had to do it for one of them, probably when one needed to adjust there's after they 'found' a new dep pipe ;)

Too right toady, I guess ones not as bad as the other but there both rounded off :/

The question why didn't Yamaha design these carbs so that the end came out of the tube rather than half way down, so that if it did round off you could carve in a new head with a saw, any way to get replacement parts sold

FunkeyMunkeyDavid · Guru

its all good fun hmm bit of copperslip on the new screw stops it happening again (and the right size screwdriver) yamaha and mikuni should have made it star drive confuse

Reef · Guru

Thanks mate, will get hold of some then, cheers

Reef · Guru

Ay so my mate told me I could go to ex step dad to get the air screw sorted and so i did, such a good bloke this guy

Charged me a 5er for getting the air screw out and a spent a good 45/1hr on it ;) he tells me that he works on other people's bikes in the evenings cus he loves working on them (not like some people which only do it for the money) and he told me that if I needed any other work doing and that because I'm on minimum wage (student) he would only charge a 5er an hour, as long as if its in the evenings, how good is that! Know he does it for his ex step son for free but I didn't expect him to say that... What a bloke ay

Working on the side in a Honda dealership for many years, and been into bikes for so long (really into track riding as well) and having track/road bikes as projects and built them up to what they are now he knows what he's doing with bikes, and he actually takes pride in doing what he does

Ill be getting him to work on mine again in the future for sure :)

So yeah he carefully drilled out the air screw and used a tap and dial for the thread, and now I just gotta wait for the air screw to come in and he said he will make sure it's fits nicely in there

Sweet :D

FunkeyMunkeyDavid · Guru

sounds like a good bloke to know,keep hold of him lol does he work while you wait? (so you can watch and learn i mean biggrin )

Reef · Guru

Haha yeah too right ;) yeah man, he spent about another half an hour showing me other little things as well like the advantages of using copper grease over wd40 to lubricate and explaining the benefits of making adjustments to the suspension, especially for track riding, ......etc, it all helps ay, not like I can rely on my dad to improve my bike knowledge even though he use to ride them, he f**ked off when I was 14 lol

Slowly improving mi knowledge in bikes and getting more confident and stripping it down further by myself

Getting there lol ;)

Reef · Guru

Ok so took it out for a long ride this evening even though it was bloody freezing with someone else who rides a ybf r 125, was out from 7 till 1, giving it some beans quite a lot of the time

Anyway got home and checked the spark plug (no plug chop, just removed 2 minutes later after getting home) and to me it looks like its running lean still, is that the case lads? Please could you check the pictures I took straight after removing the plug, don't know what it's called on the plug but you can see clearly in some pics that the top half ish is brown and the rest is white??

t

Can anyone can confirm this and suggest anything if so??Needle is stock a d in the middle position if that helps and the air screw is winded out 1 and a 1/4 turns as recommended and as mentioned before, 240 main, 25 pilot

Thanks

Reef · Guru

Anyone?? Please, don't want to ride it incaseit is running lean but I really need to lol, only been on it once in the last month or so

Calum122 · Guru

How much smoke have you got coming out the back?

Have to set the autolube correctly.

The oil doesn't run off the carb on the dt's. They run off the throttle. From what I can see on my phone. It looks sooty round the edge and whitish in the middle. This is contradictory from each other. Black indicates too much oil. White indicates too little.

Enures that the auto lube is set up correctly. Take off the cover and twist the throtle. Ensure that you're getting oil on tick over. Also. Ensure that the system is bled. If you're having difficulty bleeding the oil. Pour two stroke downthe cylinder. With igntion off. Use starter motor or kick start to turn the engine. Ensure oil line is connected. Pour more oil. Down cylinder.

Should be fine once done that. Start engine. Wait for oil to burn in cylinder. Check to see if smoke is still comic out rear end. Once the engine is warm it WILL smoke less if not none. Get any mates to ride or drive behind you for a few miles to check to see if they can still smell two stroke.

But really if you've checked what I've said you shoul be alright.

Or just got premix.

Calum122 · Guru

I'd also gel that spark plug on. Get yourself a iridium one next time.

Just had another look at the plug. I'd increase the oil if I were you. You know what you're lookig for. I haven't got my comp so I cannot upload pics of what you need to do.

Calum122 · Guru

The spark plug should be a nice brown colour when setup correctly. If you do decide to adjust the autolube you should only need to do so by a fraction amount.

Reef · Guru

Thanks mate

So just texted a mate who was riding with me for a couple of hours last night and he texted back saying it wasn't smoking like a two stroke nor could he smell it, even though the head was only 9 degrees majority of the night and was out for hours ?? :/

Hmm ill post a vid tommorow to show how much oil is going through both when idling and when using the throttle (presume its clear tubing), but as for bleeding how can I do this, and if I can't do it instead I can pour oil through the hole where the spark plug goes (lol such a noob), am I right or would I need to to remove the cylinder head, never has been removed in its life ;)

Thanks

Calum122 · Guru

Nah. No need to remove cylinde since you'll need to replace head gasket. Which you don't want to be doing. I've left my laptop at my brothers.

The way to see how much lube you're using is to take th case off off the side. How familiar are you with the setup?

I'm on about taking the oil case housing off. It's the small cover on the right side of the crank case.

There's two notches on brass instruments. They need to allign. I put mine jst a tad over so oil is being driven through the bike at idle I.e. No throttle. If it is not alligned then you'll need to adjust it. That's the two nuts on the left to where the cable is coming from. Adust it to tighten the cable. Should see the notches begin to allign.

I'd pour two stroke down the spark plug whole just to ensure you've got oil on start up. And if there's air in the system it'll give your bike oil whilst the oil pump bleeds the system. To be fair your bike is probably fine. You're just being paranoid. Two stroke is designed nowaders NOT to smoke. As for the smell I buy my stuff for £25 a litre. So it going to smell.

Cheaper stuff smells like shît lol. If you're really worried. Take the exhaus off and have a quick look up the exhaust port. Use an inspection light to check for any serious scoring on the piston. You shouldn't see any. Although if you're running the original piston then it can be expected.

Also. It's worth noting that just because there is scoring it might not necessarily be oil. It could be down to heat seizures or inefficient breaking in of the engine. If the engine isn't run in propery then you can get these sort of problems. Heating and sudden cooling of the cylinder also causees this effect.

Reef · Guru

Gel, what do you mean by gel mate, as for irridium I had problems in the past with them but I'll try one again if your suggesting that :)

As for the auto lube thanks, ill get it adjusted if its needs it :)

Calum122 · Guru

LOL! it's Chav for get rid of.

Reef · Guru

Just saw your new post, thanks mate, yeah I knew under that right hand side cover had the oil parts behind it but never have took it off before, ill have a look at doing this tommorow then get it checked by a decent mechanic I know who will have a look at it for free :)

Ay yeah like you say probably being paranoid but my dts my baby ;) run it on silkolene comp 2 plus (£17 a bottle) and have always warmed it up before riding :) but yeah it's got the original piston in it and its probably just coming up to 13,500 now (using vapor speedo now)

Calum122 · Guru

Mate that stuff is boom and you should smell that stuff from a mile away!

Should see it smoke loads on start up!

It's really obvious when you see it. I did have a post somewhere explaining it.

Like I said I am not near my comp so I can't upload anything to make it clear.

toadymc · DTR Respected Member

You need to do a proper plug chop to test it realy mate but personaly i would put your snorkel back in but thats just my opinion as i know a lot of people say the snorkel dosent effect jetting

toadymc · DTR Respected Member

Forgot to ask was that a new plug or the plug from before you up-jetted

Reef · Guru

Yeah well it defiantly smokes when cold starting and I can always smell the oil on idle if I put mi nose to the exhaust ;) but yeah no worries mate, ill try finding it :)

Toady thanks for that, good point, ill do one today after looking at the autolube, how many miles should I do before a plug chop roughly?? Just enough so that the bikes warm?? And for future reference and would help in this case, can I do a plug chop and then alter the setup like putting back the snorkel on and then straight away do another plug chop to see the difference from the plug?? Or do I need to do a little ride in between??

As for the spark plug toady it was a brand new plug before setting off :)

Calum122 · Guru

The snorkel will affect the plug chop. It should tell you whether the snorkel is necessary or not.

Reef · Guru

Just about to adjust the autolube system,

The adjusting marks a and b has to matchwhen the throttle cable free play ends' , what does this mean sorry, don't get the last bit?? And to have it pumping through on idle how much over should i put it

Here's a vid and pic of mine, if it should be aligned when on idle then I guess it needs adjusting, how easy is to bleed it, looks straight forward in the manual but is it a long/hard process to get all the air out of the system

Cheers, then ill do a plug chop :)

https://i1226.photobucket.com/albums/ee420/reefvodka/2012/Carb%20update/929FCBC1-5F86-4BB0-B12D-7C028E78A2F0-4064-0000067616E05A43.mp4

-- Edited by reef on Monday 29th of October 2012 04:07:26 PM

-- Edited by reef on Monday 29th of October 2012 04:27:24 PM

Reef · Guru

-- Edited by reef on Monday 29th of October 2012 04:54:55 PM

Reef · Guru

Anyone?? :)

Calum122 · Guru

Make sure the notches line up an you'll be alright.

It isn't a close system. So what I always do is pour two stroke down the cylinder. Few rotations of the engine. A little but more then put it all back together. Start her up and by the time the oils burnt off in te cylinder the system should be bled. Unless the air bubbles right at the top lol.

Reef · Guru

Cheers mate, must be ****** off everyone on ere with my nooby thread but I need it sorted and your the best lads to ask :)

Ok so gonna do this now, how much oil should I pour down mate, tea or table spoon of oil maybe both times I pour oil down the plug hole??

Calum122 · Guru

Ah didn't think of usin a spoon lmao! I've got an oil can I use. I just chuck a couple of squirts down there. I'd say two or three table spoons. Depends how much actually goes down.