Dt125 mikuni carb
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@irongamer727 first flatslides came with 22.5 and later models 17.5 and 210 mainjet
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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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Either way, it is too big right?
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Response please...
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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.
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@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 thin brass pipe near to the hole the pilot jet drops in is the fuel pipe whilst on the choke cycle, very thin wire needs poking down to the bottom and then through the cross holes.
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Alright so as I'm getting progressively better at them wheelies and can ride longer, I've noticed stuff. The carb wants to piss out the transparent liquid gold (petrol).
Is tilting the carb the only way to go? Or could a float adjustment do the trick?
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@irongamer727 Sounds like the flat is causing you issues.
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@irongamer727 Float sorry.
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@calum would I want to raise or lower it?
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@irongamer727 Just make sure it's shutting off the fuel bud
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@calum won't that affect my crusing, regular riding?
I mean the carb will tilt almost 90° on a real wheelie.
I've spoken to some guys really good at that rear wheel (they ride a dt) and some of them just plug the overflow. But I mean it's clearly leaking for a reason. Can't understand how plugging the owerflow works.
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As far as I'm aware if you plug the overflow it will still dump the fuel, but it will dump it out the rear intake of the carb into the airbox, which will then get sucked into the engine. Never had or seen any problems with standard Dt carb during wheelies, and I know people who regularly scrape and coast.
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@glynn123 someone's got to be the first
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@irongamer727 doesn't seem like you're having much luck with this build mate haha
