4
. CYLINDER HEAD/VALVES
10
BR & M2 250 ENGINE
on the crankcase.
Keep the round hole on the camshaft gear facing
up and align the punch marks on the camshaft
gear with the cylinder head surface (Position the
intake and exhaust cam lobes down.) and install
the cam chain over the camshaft gear.
Install the dowel pins.
Install the camshaft holder, washers and nuts on
the cylinder head.
Tighten the four cylinder head nuts and the two
bolts between the cylinder head and cylinder.
Torque:
Cylinder head cap nut: 19.6N-m
Cylinder & cylinder head bolt: 7.8
∼
11.8N-m
Turn the cam chain tension screw counter
clockwise to release it.
Punch Marks
•
Apply engine oil to the threads of the
cylinder head cap nuts.
•
Diagonally tighten the cylinder head cap
nuts in 2
∼
3 times.
•
First tighten the cylinder head cap nuts and
then tighten the bolts between the cylinder
and cylinder head to avoid cracks.
*
Cam Chain
Round Hole
Dowel Pins
Washer
Nut
Bolts
Summary of Contents for Bug Rider BR-250
Page 1: ...BR 250 BR 250SS M2 250 SERVICE MANUAL Manufactured by PGO of Motive Power Industry Co Ltd...
Page 34: ...4 CYLINDER HEAD VALVES 1 BR M2 250 ENGINE SCHEMATIC DRAWING...
Page 46: ...5 CYLINDER PISTON 1 BR M2 250 ENGINE SCHEMATIC DRAWING...
Page 55: ...6 DRIVE AND DRIVEN PULLEYS KICK STARTER 1 BR M2 250 ENGINE SCHEMATIC DRAWING...
Page 71: ...7 FINAL REDUCTION 1 BR M2 250 ENGINE SCHEMATIC DRAWING...
Page 82: ...8 CARBURETOR BR M2 250 ENGINE...
Page 90: ...9 A C GENERATOR STARTER CLUTCH 1 BR M2 250 ENGINE SCHEMATIC DRAWING...
Page 97: ...10 CRANKCASE CRANKSHAFT 1 BR M2 250 ENGINE SCHEMATIC DRAWING...
Page 103: ...10 CRANKCASE CRANKSHAFT 7 BR M2 250 ENGINE Torque 7 8 11 8N m Cam Chain Tensioner Slipper Bolt...
Page 105: ...11 COOLING SYSTEM 1 BR M2 250 ENGINE SCHEMATIC DRAWING...