My youngest son has a RM Z125 Suzuki dirt bike. We have had a hell of a time getting ti started. We consulted several resources and they all said his carb was gummed up and needed to be taken apart and cleaned. We did and found that the float valve was stuck. After five cleanings the thing starts with little problems but now we have yet another one. It over revs. When you hit the kill switch it keeps running on. There does not seem to be any adjustments that can be made from the outside. The clutch has to be engaged to stop the thing from running. So, we have gone from "No go" to "Can't stop" What suggestions do you have?

Hi Check that the kill switch is connected to the ignition & is working OK
There may be a carbon deposit on the head which is glowing red hot thereby igniting the fuel like a diesel (without a spark) The other possibility is dieseling by over compression (at 14:1 compression petrol self ignites) but that is not very likely

My Son Aquired an OLD Suzuki 200 was told it was a RM 125 some one has Cut the Wiring Harness Off where it comes Out From Magneto Cover the Wiring Harness from that Point to the Box Mounted Under Seat Wiring Harness. I am Assuming this is a Capacitor of some sort! Would like to know where to find a Printable Wiring Diagram for this Bike The Frame was Blue the Seat was Blue but Fenders & Gas Tank were Yellow! Does the Colors Mean Anything? Oh & the ID Plate was Gone! Could not Find any #s that might Suggest a Vin # Any Help would be Appreciated