Had a carb problem that required the choke being on at low revs to stop it stalling. Stripped carbs and would only ride normally on Prime position. Stripped carbs again and fully cleaned them again, checked air filter is clean, checked all lines and all correct, stripped fuel tap and confirmed as clean. Started it and it shot to 5000rpm and stayed there. Gave up till next day to sort but on starting it, it seems to have sorted itself out. Messed with tickover and now idles a treat and revs spot on.

However, went for a ride and all was perfect until I did about 12 miles then the power started going lumpy between 4-5. From there only got worse at high revs affecting anything above 3.5. By the time I got back home, another 12 miles back it was happening all through the revs.

Has anyone got any ideas as all I can think of are the plugs but could that happen that quickly? Also, I dont really want to do the carbs a third time in one week.