1981-1984 Official Honda ATC250R Shop Manual, Page 113Get this manual
FRONT WHEELFRONT FORKSTEERING
TIRE REPAIR (EXTERNAL WITH RUBBER PLUG)
NOTE This method is an emergency repair onlyReplace the plug at the first opportunity with cold patch
Remove the puncturing objectInsert rubber plug through the eye of an inserting needleApply patching cement to the plug
Center the needle on the plug and insert until the plug is all the way in the tireTwist the needle several timesPull the needle straight out so that the plug is about 10 mm (38 in) above the tread surfaceTrim the plug mm (116 in) above the surfaceRepeat the above procedure if the puncture is large