I replaced all the bearings and seals in a VBC about a year ago...and its sat since then and stared once 3 month ago

Yesterday I pulled it out ..it started second kick but would not idle no matter what i did..changed the plug for new.....no symptom change..altered air fuel..still no idle

Cleaned the carb and put all new gaskets in it including under carb box and carb itself

No change

Then ...as I was cleaning around the carb box cover with CRC whilst engine running I heard the revs creep up

also weirdly if I tip the scoot on its side while running the revs increase
Engine oil all nice and thick and clean with no gas smell

soooooo smacks of fly side seal leak

Do they dry out if you dont use them regularly?(seals that is)