250-500cc wr300 NEED HELP crazy jerky when not on the pipe

hey guys i have a wr300 and just put a lectron carb on hoping to smooth out the low end power do alot of dual sport and tight trail riding so nice to be able to not be wide open on the pipe all the time when i first put the lectron on was night and day difference was much smoother getting on the pipe and all around but now it seems to be really jerky and jumpy when not on the pipe like 1/4 to 1/2 throttle bike surges and doesn't sound good but if i get on it it ripps stupid fast sounds great idk what is going on tried going leaner on metering rod tried going richer no difference once so ever im confused could it be reeds maybe silencer idk what is going on someone HELP

Hi, check the carb to manifold for air leaks. Lots of posts here about it. If you think it's leaking you can tape the rubber boot, reed block and manifold while you wait on a new boot and some gaskets.

Could be reeds
Airfilter partially blocked jet do you run a fuel filter to the carb?
Maybe airleak you may have a seal gone on the crankshaft.
Any more info how long was it good for before it started playing up? Did it happen after you last cleaned it?
Is it kicking back when you start it.
Loads n loads of questions.