Two Brothers Racing Honda XR50R - Manual (Page 5)

Install cylinder head onto studs
(BE SURE TO PULL CAM CHAIN THROUGH
CYLINDER HEAD, use a screwdriver to keep
cam chain from falling back through slot)
Install the cylinder head cover gasket and
cylinder top cover onto the cylinder head
(BE SURE TO ALIGN MARKS ON CYLIN-
DER HEAD AND CYLINDER HEAD TOP
COVER)
Install the washers (x1 copper goes on left-
lower corner, x3 regular) and nuts.
Torque nuts to 9 ft lbs.
Tighten the cam chain roller and cylinder side
bolt, torque both bolts to 8 ft lbs.
5. Align flywheel to the "F" and "T" marks
Align the cam shaft to the Takegawa logo is at
the 12 o’clock position.
Install the cam sprocket onto the cam shaft
(THIS CAN BE VERY TRICKY, TAKE YOUR
TIME)
Install the cam sprocket bolts (secure the fly-
wheel with a wrench to prevent it from rotat-
ing) and torque to 7 ft lbs.
6. Adjust valve timing and tappets (BE SURE
THE FLYWHEEL IS ON THE "T" MARK AND
THE CAM SPROCKET IS ON THE "O")
XR50R 88cc Engine Build Instructions.qxd PAGE 5