Ski-Doo FORMULA S 1997, Shop Manual

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SHOP MANUAL SUPPLEMENT
MX Zx 440 LC
PAGE 17 OF 18
VEHICLE MODEL MX Zx 440 LC
ENGINE TYPE 454
Number of Cylinders 2
Bore mm (in) 67.5 (2.6575)
Stroke mm (in) 61.0 (2.402)
Displacement cm 3 (in 3 ) 436.6 (26.6)
Compression Ratio (corrected) 6.6
Maximum Power Engine Speed
➀
± 100 RPM 8450
Piston Ring Type 1 st /2 nd ST/R
Ring End Gap
new
wear limit mm (in)
mm (in) 0.25 (.010)
1.0 (.040)
Ring/Piston Groove Clearance
new
wear limit mm (in)
mm (in) 0.04 (.0016)
0.2 (.0079)
Piston/Cylinder Wall Clearance
new
wear limit mm (in)
mm (in) 0.1 (.0039)
0.15 (.0059)
Connecting Rod Big End Axial Play
new
wear limit mm (in)
mm (in) 0.39 (.0154)
1.2 (.0472)
Maximum Crankshaft End-play
➁
mm (in) 0.3 (.0118)
Maximum Crankshaft Deflection mm (in) 0.08 (.0031)
Rotary Valve Timing
➂
and P/N 420 924 XXX
Opening
Closing
146° – 65°
502
Magneto Generator Output W 220
Ignition Type CDI
Spark Plug Make and Type NGK BR9ES
Spark Plug Gap mm (in) 0.45 (.018)
Ignition Timing BTDC
➃
mm (in) 1.48 (.058)
Trigger Coil
➄
Ω
190 – 300
Generating Coil
➄
Ω
10 – 17
Lighting Coil
➄
Ω
0.2 – 0.35
High Tension Coil
➄
Primary
Ω
0.3 – 0.7
Secondary k
Ω
8 – 16
Carburetor Type PTO/MAG VM 34-498/499
Main Jet PTO/MAG 260/250
Needle Jet 159 P-8
Pilot Jet 45
Needle Identification
— Clip Position
6FJ43
Slide Cutaway 2.5
Float Adjustment ± 1 mm (± .040 in) 23.9 (.94)
Air Screw Adjustment ± 1/16 Turn 1
Idle Speed RPM ± 200 RPM 1700
Gas Type/Pump Octane Number Unleaded/87
Gas/Oil Ratio
Mixing Oil
Premix 40: 1
Bombardier-Rotax
Synthetic
Type Liquid
Axial Fan Belt Adjustment
Deflection
➅
mm (in) N.A.
Force kg (lbf) N.A.
Thermostat Opening Temperature °C (°F) 42 (108)
Radiator Cap Opening Pressure kPa (PSI) 90 (13)
E
N
GI
NE
C
O
LD
N•m (l
b•f
t)
Drive Pulley Retaining Screw
➆
Exhaust Manifold Nuts or Bolts 23 (17)
Magneto Ring Nut 125 (92)
Crankcase Nuts or Screws
M6
M8 9 (6.5)
29 (21)
Crankcase/Engine Support Nuts or Screws 40 (29)
Cylinder Head Nuts 29 (21)
Crankcase/Cylinder Nuts or Screws 29 (21)
Axial Fan Shaft Nut N.A.