1
. INSPECTION/ADJUSTMENT
6
BR & M2 250 ENGINE
Remove the cylinder head cover.
Turn the A.C. generator flywheel to the top dead
center (TDC) on the compression stroke so that
the “T” mark on the flywheel aligns with the
index mark on the left crankcase cover.
Inspect and adjust valve clearance.
Valve Clearance
: IN: 0.1mm
EX: 0.1mm
Loosen the lock nut and adjust by turning the
adjusting nut
Valve Wrench
CARBURETOR IDLE SPEED
Lift up the seat and remove the inspection cover.
Warm up the engine before this operation.
Start the engine and connect a tachometer.
Turn the throttle stop screw to obtain the
specified idle speed.
Idle Speed
: 1450±50rpm
When the engine misses or run erratic, adjust the
pilot screw.
CYLINDER COMPRESSION
Warm up the engine before compression test.
Remove the center cover and spark plug cap.
Throttle Stop Screw
Pilot Screw
•
Check the valve clearance again after the
lock nut is tightened.
＊
•
The engine must be warm for accurate
idle speed inspection and adjustment.
＊
Top Dead Center
Valve Wrench
Special
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...
