Rotax 277 A gear box tools, Rotax 277 special tools.

Further tools required
Torque wrench - up to 100 Nm (880 in.lbs)
insert 27 mm fitting torque wrench 
fork wrench 22 mm
socket wrench 8 mm 
rubber hammer
hexagon socket screw key 4 mm 
hexagon socket screw key 5 mm. 
hexagon socket screw key 6 mm
screwdriver
Philips blade screwdriver 
circlip pliers