I have an 07 rocket roadster and the bike keep over reving to about 2000 revs whilst riding it is an intermittent fault and if I turn the ignition off then fire the bike up the revs drop back down to about 800 revs on tickover anyone got any ideas PLEASE

SOURCE: 1991 CR 500 (reving to high on idle high serges)

take some wd 40 & spray around the carb boot while running to see if the idle drops for a few seconds. sounds like you have an intake side air leak causing a lean condition making the motor rev high.

SOURCE: Kawasaki GT 550 - erratic tickover

Put a carby kit through it and clean, inspect and blow all ports through, check intake rubbers for any leaks, (pin holes can change air fuel ratio) Especially check for obstructions in your idle/bypass jet, do the kit first so you know its right, then tune your idle mix until steady.

SOURCE: I HAVE AN OLD YAMAHA SR 125 ITS REVS GO UP AND

Remove the water trap bowl at the bottom of the petcock, (gas valve). Any water or trash in the bowl? Drain a cup of gas from the tank. Any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the two screws on the outside throat of the carb and spray into the screw holes as well.
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Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. Set the idle speed with the idle screw. This process should get you back on the road.

Since you mentioned uneven idle revs, be sure the carb and manifold are on tight and also tighten the cylinder and head. Air leaks can screw up the idle.

Please rate this solution. Thanks speedfreak41

SOURCE: 2006 KTM 125 sx high revving out problem

Look into your power valve. If it doesn't operate freely, you won't get peak performance. They can get gummed up.

SOURCE: 2002 kawasaki vn 1500 classic.electrical fault.

Check the ground wire at the battery, at the negative post at the battery you'll find a smaller (black/yellow) wire, it must be plugged into the main harness, it might have become unplugged, the connections will be right close to the battery.