Hi there i have a ''92/93 model zzr400 kawasaki and it starts fine but needs throttle or it dies on me then i have to restart it i have to keep revs up to stop this , also after awhileriding it the temp goes up a bit but water level is ok an y ideas what may be the cause of the fist prob many thanks

You need to remove and completly disassemble the carbs and clean them.

Use the choke on cold starts. There should be no need for throttle.

spary wd-40 on all electrical connection that was expossed to water liberally.....if that doesnt do it, then you probably got water in your pulse generator system coils and will have to pull the cover off and see if theres water in there.

The Choke may be stuck or left on.

hi m8,,b4 i can assume anything else,just a couple test u need to try out,, make sure fuel is getting in carbs ,,just undo carb drain screw and check fuel is in the carbs ,, just to iliminate 1 thing,, then pull off one plug cap at a time take the plug cap off the ht wire of the coil, and snip a bit off the end ,, so u can see a strand or to of copper or brass wire in the core off the ht wire,, then screw the cap back on, repeat the process to all the other 3 plug caps,, while u r there make sure the coloured wires to the coil arnt pulled off or corroded,,cheers

Its Starter relay may be causing main problem. You can try Yezdis starter relay as it can help you solving your problem

check starter solenoid.see if getting power to starter side when pressing button .if yes check if power to starter w/ test light when pressing button.if power there check starter,also motor, will it turn manually or is it seized.if no power to starter side of solenoid, jump across solenoid posts w/ a large screwdriver -motor will probaly turn over,w/ key on.if small wire to solenoid has power when pressing start,solenoid bad,if no power, wiring or start button bad.

Hi!
Not being well familiar with the ZZr's however what is the Red LIne on this particular model? if it is around 10.000 then your rev limiter is kicking in stopping you blowing the engine.
Hope this helps!
Paul 'W'
Onyer~EDson(:0) {#><U.K.

Hi and welcome to FixYa,

Initially, would suggest:

• a thorough cleanup job on the carbs;
• inspect, clean the rubber couplings from carbs to intake manifold;
• inspect tighten coupling clamps;
• ensure no vacuum leak when re-assembling;
• inspect, check, ensure air intake box seating to the carbs. Very important, there should be no air leak. All air must pass through the cleaner/filter;
• check/clean tank, including fuel valve control and built-in fuel filter;
• use PRIM instead of ON on the fuel valve control.

And the "carborator sleeves" will only slide up when there is sufficient vacuum (engine running) and the throttle is turned.

Good luck and Thank you for using FixYa. Happy Holidays.