So, havnt been riding my bike recently due to exams and the bad weather etc

anyway, jumped on it today and after letting it warm up for 4-5 mins or so took it out. But i found out that the bike doesnt want to get past 8k reves. Just kinda starts dying around 7k and wont go past 8k. I got a 250 Bandit so usually it goes fine even around the 10k mark.

Its seems to be fine 1k-6k revs

is it a block in the fuel line or issue with air filter or...what?

Though my tank is low on gas, but i don't think that would be the issue if the bike is still running.

Thanks