Lowered Base Gasket from .5 to .3, now bog at WOT

[brads1725]

Hi All,
New to the GG community here, only owned one for about 6 rides.
Bought a 2014 EC250 Factory Replica, was going great all around. Engine has 96 hours on it so pulled the cylinder out and threw a wiseco piston in it. While I was at it I dropped the base gasket from the .50 to the .30.
Bike runs great bottom end, idles fine, pulls up the front wheel as you roll the throttle on. But now if you dump the throttle to wide open it bogs.
I got the bike at 81hours and it was a little boggy revving, it had an old B7ES in it, changed it to a BR8EG and went great for the next 15hrs - nice tan colour.

Now with the new piston and the WOT bog its looking black.
Does any one know of any jetting changes that must be done when dropping the base gasket?? only 0.2mm difference, wouldn't have though it would change much. Didn't check squish with solder (lockdown) just a bit of blutac, so will be a bit inaccurate but was something along the lines of 2.0-2.3.
It has sat with motul 800 in the tank and carb for 3 weeks, so I will pull the carb and clean it in case its and issue with old fuel/oil separating. Will put a new BR8EG in it tomorrow to make sure that isn't the issue.
Everything was going good before, bit of wear on the piston but good for 96hrs. Only trail riding at sea level. Everything is stock otherwise.
Power Valve operating freely, ran it with the cover off
New coolant, dumped it and clean.
Oil Level fine, no sign of water
Im not going to get the head machined or anything, everything was all good before so worst case scenario i will roll back to the .50 gasket. Just be good if there is a known jet change to get the best of both worlds

Cheers all