Dt125 mikuni carb
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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.
Always Originate, Never Pirate!
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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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@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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@irongamer727 doesn't seem like you're having much luck with this build mate haha
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Plug the overflow lol, that's just masking the problem.
It'd be overflowing for a reason and the float is a pretty well balanced item, meaning it shouldn't just purely on gravity. You'd have the be upside down for it to shut, at which point you won't be needing any fuel.
I'm not saying adjust it, I'm just saying make sure it does shut off the fuel.
