Honda CRF450R 2009 Service Manual page 237

Remove the swingarm pivot nut, washer and bolt.
Remove the lower engine hanger
bolt,
nut and washer.
Remove the engine from the right side of the frame .
Note the direction of the engine hanger plates and
mounting bolts.
Temporarily install the swingarm pivot bolt so the frame
can be moved and stored safely.
ENGINE INSTALLATION
NOTE '
Install all the engine mounting fasteners loosely,
then tighten the bolts and nuts 10 the specified
torque.
Route the wires , hoses and cables properly
(page 1-23)
ENGINE REMOVAUINSTALLATION
8-9