My 1986 fzr 400 runs lumpy,its had a full service and the carbs balanced .i suspect the silencer ,any ideas please

SOURCE: fzr6 running lumpy

il try n help m8,, can i start by eliminating a few things,, have u made sure all 4 carb floats are the same height ,they need to be, ,and there is no holes in the diaphrams at the top of the carbs,,even a pin hole will give u grief,, ,,wot happens wen u pull the choke out wen motor is warm and idling,, if it evens out and pipes warm up then theres a blockage in 3 and 4 carb,and idel jets,or could have a split vacume pipe, or a air leak between the carb and cylinder,,if all fuel symtoms are ok ,, then make sure the coil wires are on properly, and good spark on the coolest cylinders, , try swapping over the coils to to see if the left cylinder becomes cooler than the right,,hope that gives an idea,,

SOURCE: 1991 gsx750f running lumpy

balance the carbs and clean the plugs.

SOURCE: fzr6 running lumpy

also check the plugs are they new ,do they have build up eg cardon/oily ? check the jets sizes are they rigth size ?

SOURCE: 1150 adventura misfire

I CHANGED THE BATTERY ON MY 2000 BMW GS 1150 R NOW WHEN I START IT UP IT RUNS REALL REALLY ROUGH CAN ANY BODY HELP