Dt125 mikuni carb
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It’s also worth remembering that carburettors like still air, that’s why the air box is so big, so if you have that strange bottle on the side of the pipe that connects the air box to the carb, it needs blocking as it’s designed to disrupt air flow as a form of restriction.
wrote on 19 Apr 2018, 18:14 last edited by@kevin no it's not restrictive, it's meant to fill up blind spots
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wrote on 19 Apr 2018, 18:14 last edited by
Could you link some pilot jets?
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wrote on 19 Apr 2018, 18:42 last edited by
:311670245943 eBay item no.
No I didn’t mean the yeis bottle I was referring to the other one on the air box side of the carb. -
:311670245943 eBay item no.
No I didn’t mean the yeis bottle I was referring to the other one on the air box side of the carb.wrote on 19 Apr 2018, 18:55 last edited by -
wrote on 19 Apr 2018, 18:55 last edited by
Is is this one?
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Is is this one?
wrote on 19 Apr 2018, 19:18 last edited byYes that’s the one. l would love to see the maths behind it,unfortunately dtpedia.de doesn’t mention it when referring to the vergaser or carburettor as we know it.
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wrote on 19 Apr 2018, 19:54 last edited by
@Calum is it really a restrictor?
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@Calum is it really a restrictor?
wrote on 19 Apr 2018, 21:45 last edited by@irongamer727 Not to my knowledge, the little box on the side of the air box can also be found on the competition bike WR200, they wouldn't restrict a competition bike. At least that's what @AndyYam told me. And he has a lot of experience with all of that.
Secondly, the PowerJet, to my knowledge (Happy to be corrected) is a clever mechanism to lean the fuel off at wide open throttle, when actually you don't need as much fuel.
The logic is that at WOT, you should be easing off the load of the engine and now it's all about refining that combustible mix. The leaner you can run that engine, the better the burn of combustible mix can be.
The trick is to lean it off as much as possible, without causing detonation.
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wrote on 19 Apr 2018, 21:51 last edited by
Removed that little airbox bottle on mine, can't say I noticed any difference but bike runs strong with pleanty pull with it removed and plugged.
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Removed that little airbox bottle on mine, can't say I noticed any difference but bike runs strong with pleanty pull with it removed and plugged.
wrote on 19 Apr 2018, 21:52 last edited by@glynn123 There are better ways to restrict the bike than some plastic box on the inlet tract lol.
I don't know the science behind it, I figured it would work in a similar fashion to the YEIS. But it's as mystery.
The DTRE also had YAIS as well.
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wrote on 20 Apr 2018, 09:58 last edited by
My Haynes manual says stock pilot jet fit the Dtx is 17.5? What the hell? Thought it was 25.
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My Haynes manual says stock pilot jet fit the Dtx is 17.5? What the hell? Thought it was 25.
wrote on 20 Apr 2018, 13:07 last edited by@irongamer727 first flatslides came with 22.5 and later models 17.5 and 210 mainjet
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@irongamer727 first flatslides came with 22.5 and later models 17.5 and 210 mainjet
wrote on 20 Apr 2018, 13:25 last edited by@kevin Alright, thx
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wrote on 25 Apr 2018, 16:26 last edited by
So I was finally able to unscrew my pilot jet for my dtx. It is a nightmare to start now with the Athena kit. I looked in the Haynes manual and it claimed stock pilot jet for the dtx was 17.5.
Mine was a 35! What on earth? How is it possible it is hard to start NOW and not when it was 100% stock?Pilot jet size 35 https://imgur.com/gallery/fS02dV8
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wrote on 25 Apr 2018, 18:28 last edited by
Either way, it is too big right?
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wrote on 26 Apr 2018, 10:12 last edited by
Response please...
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wrote on 26 Apr 2018, 10:33 last edited by
Ask any tuner how to set up a carburettor and you'll get the same response.
It depends on your setup.
Everything from Atmospheric conditions to state of the engine and even altitude will affect jetting.
It's imperative that ones carb is tuned to these varying conditions.
20 years ago, Yamaha spent thousands on designing the perfect carburettor settings to get the DT roughly in the right ball park.
The moment you started modifying the bike, you throw all of Yamaha's hard work out the window.
Just because it had some ridiculous settings on it, doesn't necessarily mean it was wrong.
Jetting should be done to suit, and there is reams of guides on here to help you get the bike in right area.
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Ask any tuner how to set up a carburettor and you'll get the same response.
It depends on your setup.
Everything from Atmospheric conditions to state of the engine and even altitude will affect jetting.
It's imperative that ones carb is tuned to these varying conditions.
20 years ago, Yamaha spent thousands on designing the perfect carburettor settings to get the DT roughly in the right ball park.
The moment you started modifying the bike, you throw all of Yamaha's hard work out the window.
Just because it had some ridiculous settings on it, doesn't necessarily mean it was wrong.
Jetting should be done to suit, and there is reams of guides on here to help you get the bike in right area.
wrote on 26 Apr 2018, 10:43 last edited by@calum guess so. Only way is to buy and try stuff I guess
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Response please...
wrote on 26 Apr 2018, 16:13 last edited by@irongamer727 I’m a firm believer in leaving things the way they are and not thinking I’m better than the designers.
To answer your question 35 is very big for your carb.
Does Athena give any tips on resetting.
You say it’s hard to start, have you checked the fuel feed pipe when the cold start lever is on as it’s very narrow and often gets blocked. -
@irongamer727 I’m a firm believer in leaving things the way they are and not thinking I’m better than the designers.
To answer your question 35 is very big for your carb.
Does Athena give any tips on resetting.
You say it’s hard to start, have you checked the fuel feed pipe when the cold start lever is on as it’s very narrow and often gets blocked.wrote on 26 Apr 2018, 17:22 last edited by@kevin nope. Athena don't give any recommendations at all. Do you mean the fuel hose itself? That's brand new. The choke works, could there be some debris in the mechanism you think?