Stalling down hills?

[nick790]

Had the problem for a while, just been living with it but now it's costing me time.
I run a CCK needle on clip 2, 42# pilot jet and 178# main jet. It's on my 08' EC250.
Before I had 40# pilot and 180 main with the stock needle.

It seemed to run cleaner just off idle with the old set up, as now it stalls over obsticals sometimes. But I like the control the CCK gives you in the mid and high rev range.

It also leaks whenon the side stand, could this all be a float hight problem?