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spiceman

yz450f quick throttle kills engine

9 posts in this topic

i have a yz450f i bought recently.

even when warm, if i very quick snap the throttle from an idle. it dies instantly. is there a quick fix i can do to stop this? bump the idle up a tad? anything?

the guy i bought it from said it had a "poison jet" i have no clue what it is, but i'm assuming its been jetting up a bit.

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i have a yz450f i bought recently.

even when warm, if i very quick snap the throttle from an idle. it dies instantly. is there a quick fix i can do to stop this? bump the idle up a tad? anything?

the guy i bought it from said it had a "poison jet" i have no clue what it is, but i'm assuming its been jetting up a bit.

Maybe dumb but is the gas turned on? Mine did the same thing then I switched it over to on

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No idea what a "poison" jet might be!! Perhaps you misunderstood him, and he said "Boyesen", as in Float bowl for the carb? Maniac

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i have a yz450f i bought recently.

even when warm, if i very quick snap the throttle from an idle. it dies instantly. is there a quick fix i can do to stop this? bump the idle up a tad? anything?

the guy i bought it from said it had a "poison jet" i have no clue what it is, but i'm assuming its been jetting up a bit.

I thourght this was normal with a flatslide carb, you have to "roll" the gas on.

On the WR range with the mx-fcr carb an acc. pump was added, and helped a bit on this.

With my wr426 i can provoke the same, but when driving, It never seems a problem.

Cv carbs do not have this issue, but not as much fun..

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yea when i'm riding, i never notice. but it does happen if you try to take off from a stop and are too quick on the thorttle

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No, that's not normal. Or more correctly, it might be normal, but can be eliminated with the proper jetting, fuel squirt, etc., etc..

Maniac

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