Hi. I got a 1997 zx9r series "C". It starts and

SOURCE: Engine cut out under revs but will idle

fueling problem. its not getting enought fuel from the carb. check the pipes, jets and floats.

SOURCE: engine runs, but it will not rev up past 2000-3000 rpms,

are you turning the choke off after its warmed up? most will not run with the choke on and warmed up.

also try running it with the gas cap open to see if you have a vent issue in your tank. if air can't get in, then gas can't flow.

if not a choke or vent issue, then try this. turn the petcock off and then disconnect the fuel lines one at a time going into the carb. start with carb fuel line #1 disconnected (and the rest connected) and in a coffee can, turn petcock on and ignition too. fuel pump should come on momentarily and inject some fuel. see how the quantity looks. reconnect the line to carb #1 and repeat for carbs #2 - #4. your looking for a decrease in fuel to a couple of cylinders.

if all looks fine, i would then focus on the carb floats & jets. have the carbs been off for a good cleaning lately? modern fuel breaks down quickly and could cause a gumming condition in the carbs. spraying the sea foam or carb cleaner into the carbs is bypassing the everything in the carb bowl (but it means the spark plugs are ok) so there could be an obstruction. i would look there first.

if uncomfortable removing the bank of carbs, you can try a quick fix first. with the petcock closed, open the drain screws of each carb and let the gas drain out. go and buy some yamaha carb cleaner (liquid in a black bottle) at a yamaha motorcycle dealer. mix it in a separate container with gas as recommended. close the drain screws on each carb. pour the mixture into each fuel line feeding the carb and let it sit overnight. DO NOT POUR THIS MIXTURE INTO YOUR TANK. its not a fuel additive, but a cleaner that will not harm orings or gaskets, but it will not ignite with a spark plug. open the drain screws the next morning and let the mixture pour out. reconnect the fuel lines to the carbs and test drive it.

if that didn't work, then removing the carbs for a good cleaning is my next step. good luck.

SOURCE: stutterring when riding

The carbs have been balanced but not synchronized? Each of the four carb slides needs to begin to open at the exact same time. Being out of sync can cause your problem. The balance and sync on a four cylinder bike is best done in the shop. If you try it yourself have a fire extinguisher handy. < < I am serious here.

Since the carbs have been cleaned and 'adjusted', I will take the liberty to note the air screw and the idle screw factory settings and how to set them. On each carb, GENTLY turn both screws inward until they LIGHTLY seat. Now turn each screw outward one and one half turns. Now you are back to the stock settings.

If your bike has CDI ignition, the timing is preset and is not adjustable.

Please rate this answer. Thanks Corrie!

SOURCE: kawasaki 300 bayou won't rev up.

No guarantees but try this. Pull the slide from the throat of the carb. Now move the clip on the jet needle down one notch. This will richen the low end mix. Two notches may be needed but do one notch at the start.

SOURCE: my zx12r cuts out while riding them wont start

You should measure the fuel pump's supply first to check that the pump works ok.
When it dies, do you hear the pump pressing your ear against the fuel tank and turning the key to on position and your kill switch to on too?You should hear it working for 3 sec.If not working at all start by checking the pump's relay and then the pump itself.