Ec250 pv not opening

[strokeofgenius]

Hello from Ireland,my bike is a 07 ec250.Basically it has no top end as the pv is only opening half way at wot.I adjusted the pv as per sticky on this forum and even stripped governer to check for missing balls but all was ok.As the sticky is mostly about not fully closing,poor low end and rattly running i was wondering has anyone any ideas on how to get my pv to fully open.If I jam pv fully open it has no bottom end but screaming top end so its only pv mechanism thats stopping it rev out fully.Any suggestions are warmly welcomed,Cheers Gene.