Can anyone help ? Had the bike out yesterday after a couple of months lay off,although it was getting started regularly.It started and idled well,but after 10 minutes riding it started to lose power and really make some violent virations from the engine area.It wouldn't pull away and could only go to 4000 revs.I had all the rockers changed last year after similar problems,but has never quite seemed the same.It has only done arond 1000 miles on the new rockers,so they shouldn't be knackered again,should they ? I see people on here with similar problems and are advised to check fuel filters etc,but if it's the filter wouldn't it stop running earlier ?