Revving prob hi all recently bought a nc 24 (non runner) got it started and it went fine...al of a sudden the other day it started to go like a pig after 5k rpm, someone told me to check the limiter in speedo...wires where cut off (three) brown,green and black if i recall.assuming the origional owner cut them he obviosly made som sort of mod,reconnected them but still no joy...where do i look??BTW replaced the origional reg/rec with R1!HEEEEEEEELP plz thnx

Go to the site below and you can download a free parts fitch and a service manual for your bike. A wiring diagram may be in the service manual.

http://www.carlsalter.com/motorcycle-manuals.asp

Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ). Install an in-line fuel filter and a fresh set of stock NGK spark plugs.

Generic answer for each carb, (assuming no fuel injection), > >
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. 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 idle screw and the air screw on the outside throat of the carb and spray into the screw holes as well.
< < READ CLOSELY > >
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. This process should get you back on the road.

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What might be the problem is that because your not useing the original wires its causeing a shortage, and also if the rev counter is less than a 4 cillinder then thats your problem.
i have vfr 400 i change the rev clock to a 1 cillinder and it started back fireing and sent all bad ellectrics going thou the bike.
These bikes are a night mare for the electrics be carefull and good look.