Engine wants to bogg down after 3rd gear

sounds like lack of fuel or blockage check pressure regulator,fuel pump.

Sounds like engine isn't getting proper amount of fuel. Remove carbs and clean any debris. If you aren't handy, take it to a Honda mechanic. I wouldn't bother with Sea Foam, or a carb cleaner you pour into tank.

batt could be slightly weak-maybe at 12.4volts--test it for 12.6 the standard------chec connections---------also carbs cud need pro cleanin and ajust

hi, in there wisdome kawasaki played around with tyre sizes on the zx6r ninja,

tyre size rear 160/60/17.
tyre size front 120/60/17 1995-98 models zx600f

rear. 170/60/17
front 120/60/17 1998-2000 models zx600-g1

rear 180/55/17
front 120/65/17 2000-01 models zx600j

the only thing they didnt play around with is the tyre pressures all models front 36psi or 2.5 bar
rear 41psi or 2.9 bar

hope this helps and thanks for using fixya.
paul

its hard to diagnose without riding-get a repair manual it has troublshootin section--may be lookin at a bottom end job

Start with plugs. If this don't do it. You may have some bad parts in your carbs. Think about having them rebuilt not just cleaned.

Fuel starvation.

?Air leak
?Lack of fuel delivery
?Partly blocked jet

Check your tank screen. Check your lower unit and the propshaft for fishing line wrapped around it. Check under the cover and observe the wires on the stator which turn to advance the timing. It sounds like you have no torque.

when i ride my bike and i crack down on it it boggs down its a 96 zx6r