Gear Ratio Chart; Specifications - BOMBARDIER Super-Mod 1981 Operator's Manual

GEAR RATIO CHART
R.P.M. TOP GEAR RATIO 1 T01
9200 15 T 77.7 M.P.H.
9200
16 T 82.9 M.P.H.
9200 17 T 88.1 M.P.H.
9200
18 T 93.3 M.P.H.
9200 19 T 98.5 M.P.H.
9200
20 T 103.6 M.P.H.
9200 21 T 108.8 M.P.H.
9200
22 T 114.0 M.P.H.
Calculation example
To find the vehicle top speed with
- bottom gear: 40 teeth
top gear : 19 teeth
R.P.M. : 9200
correction factor: .022537
Ex.: 19 x 9200 x .022537 98.5 M. P.H.
40
Top speed is 98.5 M.P.H.
SPECIFICATIONS
ENGINE Type
354
No. of cylinders 2
Bore 59.5 mm
Stroke 61 mm
Displacement 339.2 cm
3
Compression ratio
±
.5 15.5:1
Squish area 1.2 mm ('047")
Squish angle 14°
Rotary valve
opening B.T.D.C. 137
0
closing A.T.D.C. 65°
Cylinder port timing:
Transfer port 14.4 mm 65°
Auxiliary boost port
16.5 mm 69.8°
Exhaust port 31.0 mm 98.2°
Auxiliary exhaust port 29.5 mm 95.5°
Maximum R.P.M.
9200
Piston ring type Keystone "L" with moly filling
Piston to wall clearance (min) 0.13 mm (,0051")
Ring end gap 0.15 p 0.30 mm
(,006 - .012")
Cylinder head nut torque 22 N.m (16 tt-blsl
Crankcase bolt torque 21 N.m (15 tt-lbs)
Cylinder nut torque 22 N.m (16 tt-lbsl
Engine support torque 35 N.m (24 tt-lbsl
Mag. wheel torque
80 N.m (60 ft-lbs)
32