2006 Honda TRX680 Rincon Factory Service Manual, Page 226Get this manual
CYLINDER HEADVALVECAMSHAFT Apply engine oil to the cap nut threads and seating surfaces and install the following fasteners: four washers and cap nuts three new washers and seven bolts
Tighten the nuts and bolts in crisscross pattern in several stepsTORQUE: Cap nut:55 (5.6 kgf m, 41 Ibf-ft) Install the spark plug cap
If the cylinder andor cylinder head were removed, tighten the following:three cylinder boltsfive cylinder head boltsupper engine hanger bracket bolts TORQUE: 32 (3.3 kgf m, 24 Ibf-ft) upper engine hanger bolt