1985-1986 Honda Fourtrax 125 TRX125 Shop Manual, Page 184Get this manual
REAR WHEELBRAKE DRIVE MECHANISM TIRE REPAIR (WI TH COLO PATCH ) Check the tire tread for puncturing objectsChalk mark the punctured area and remOlle the
puncturing object
Clean and roughen the punctured area inside the tire with tire rubber cleaner or wire brush
Clean the area with non-flammable solvent