Royal Enfield Bullet - Technical Specifications - 500 cc Model; 500 cc Engine and Crankshaft Specifications

TECHNICAL SPECIFICATIONS - BULLET - 500 CC
8ingle Cylinder 4 8tr~ke with werhead Valve
Cubic Capaclty : 499 CC
Stroke : 90mm
Bare-Nornlnal : 84mm
Actual : 83.96/83.97 mm
CornpresstDn Ratlo : 6.5:l
Compression Pressure : 1 10 f 5 PSI (Recommended]
Engine output
: 22 BHP/5400 RPM
Torque
: 3.5Kgm/3000RPM
Piston and piston rlngs :
IUng clearance in pxwes : (Dimensions for new components)
matn(2) : .001/.003-
*raper : .002/.004"
Rtng end gap Ln bore : .015/.020n
Maximum rlng gap permissfble : 0.038
Gudgeon pin diameter
-. . .7498/.7500"
Crank pln dlarneter : 1.24875/1.249"
Connecflng rod small end diameter : .7505/.7507
Crankshaft :
DrMng side Ball bearLng
: 25 X 82 X 17 mm (63051
Roller bearing
: 25 X 62 X 17 mm (NU 305 or N 3051
Tlming side Wer bearJng : 25~52~15mm(NU205orN205RI
Camm : -3125in
Valve lift : .3125in.
Valve thing dth .O1T clearance
Exhaust opens : 75" BTM)
Exhaust closes : 35"ATM)
Inlet opens : 3O0BTDC
Inlet clmes : 6O0ATDc
Rocker bearing inside diameh : .625/.626" [Dimensions for new Components]
Rocker spindle diameter : .6235/.6240n
Inlet valve stem diameter : .3425/.3430m
Exhaust valve stem diameter : .3405/.341OR
Vahre gulde internal diameter : .3437/.3447' -
Valve guide external diameter : .6270/.6275
Bppet guide internal diameter : .3752/.3760"
Tappet guide external diameter : .7505/.7510"
I~bricatim : Dry sump. Oil tank integral with crank case
Clutch : Wet multlplate, Oil lmmeraed
Englne sprocket : 25 teeth
Clutch
: 56 teeth
himarydrtvechaln : 3/8" pitch Duplex chatn.