1981-1984 Official Honda ATC250R Shop Manual, Page 172Get this manual
REAR FENDEREXHAUST SYSTEM
ATC 250R
EXHAUST SYSTEM
REMOVAL
Do not service the exhaust pipe or muffler while they are hotRemove the Remove the Remove the Remove the rear fenderexhaust chambermuffler springsexhaust chambermuffler boltsprotectors
NOTE Check the gasket and pipe seal for wearReplace with new parts as necessary
INSTALLATION
The installation sequence is essentially the reverse of removalNOTE After installing, make sure that there are no exhaust leaks