specifications for the 1098cc engine







engine number prefix







for identifying other1098 engine numbers go to







Engine Type 1098cc (1100)
DOME type welch plugs x 4 (S) cam follower covers



Bore
2.542'





Stroke






capacity of combustion chamber






b.m.e.p.






Bhp






Torque






Fuel System
leaded





Compression Ratio
8.3:1 in aust





Firing Order
1 3 4 2





Valve Clearance (Inlet)
.012" thou hot





Valve Clearance (Exhaust)
.012" thou hot





Cylinder Head Tension
42 ft/lb *





Conrod Bolt Tension
35 ft/lb





Main Bearing Tension
60 ft/lb





Crankshaft Pulley Tension
70 ft/lb





Flywheel Tension
150 ft/lb





Points Gap
.015"





Dwell Angle in degrees
60 + or - 5





Spark Plug Type / Gap
bp5es ngk w8dc bosch .025"




Ignition Timing ( max total mech #30)distributor mechani
0-10 degrees BTDC (depends on fuel/comp ratio and distributor curve)

CO % (at idle)

3%






Oil Capacity
5 litres incl filter





Oil Filter (Industry Number)
early R2180p mid R2200p screw on z418



Oil Type / Grade
20w/50 sg





Recommended Service Interval
3000 miles/ 5000 km





Crankshaft main journal dia
1.7505"-1.751" (44.46mm-44.47mm)




Main bearings running clearance
.001"-.0027"





Connecting rods little end size
.625"





Gudgeon pin circlip fully floating
hand push fit





Piston rings
width comps..062"" x 3 oil .125" end gaps on comp .008"-.015" aust pistons .156' oil
Valves
inlet head dia 1.219" exhaust 1.000"




Cam timing using .019" tappet clearance
inlet opens 5# btdc inlet closes 45#abdc



exhaust opens 51# bbdc exh closes 21#atdc







Valve springs free length
inner1.672" outer 1.750"




Oil pressure normal running
70 lb/in (4.92 kg/cm2





carburettor needle 1-1/4" su






Gearbox ratios standard ratio






helical gears top 1.0:1






third 1.357:1






second 1.916:1






first 3.200:1






reverse 3.200:1







Overall gear ratios with 3.765 standard final drive ratio





top 3.765






third 5.109






second 7.213






first/reverse 12.047:1






Optional diff ratios
3.938:1 4.133:1 4.267:1 3.44:1