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Yfz450 dies

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I just got an 07 yfz450. It runs good, if i rev it, its fine but if i barely bush the throttlw slowly it seems to die at 1/8 throttle. If i gove it a quick rev its fine but as soon as i push the throttle in a tiny bit less than 1/4 it dies. Is that because my idles too low? Is it a fuel air mixture problem?

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Forgot to mention. If im putting down the road barely touching the gas it wants to die but wont because im still rolling. It idles and revs anywhere over 1/8 throttle maybe 1/4 throttle but anywhere below that it cuts out. .

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Clogged low end jet, leak jet. Clean both and your good. They get dirty from old gas going stale

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Cleaning the carb, checking jets ect.. is always a good idea. The YFZ was designed to go fast, having a fast idle won't hurt.

No advantage to low idle speed except engine braking downhill.

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