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kids atc70 will not run without coke on

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engine just got rebuilt, new piston rings, carb, valves checked, timing checked, points new

anyways the engine will run strong without the choke only over 1/2 throttle.

the engine will not run up from idle unless the choke is on!

is this the idle or slow jet, i've tried different needle clip positions without much success

any thoughts on this problem?

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clean the carb throughly, the same problem persists!

the pilot jet is what? the screw with the spring right? if so when running that adjustment has no effect when turned.

when the engine is warm it idles but from 1/8 to 3/4 it will bog, seems like a lean bog cause it runs fine with the choke on, it also idles fine with the choke on

i dont understand this? its a new stock oem carb for this model

double checked the valves and timing and points gap all checked good, the only thing i cant check is the compression but its a new piston ring, seems to have great compression!

also, just cuaght my mind would changing the stock airfilter system to a k&n type, maybe less restrictive cause this?

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the pilot jet hole is clear, just to see if i needed a bigger pilot jet i ran a larger mig wire threw opening the hole, but it was to much, it now runs without choke on but is running very rich in the areas specified, i guess i going to buy some larger pilot jets, larger than stock that is!

the only thing that could of cause this is the less restrictive aftermarket air filter, i guess smaller engines can be very sensitive

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