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TECHNICAL DATA
TECHNICAL DATA
➀
Engine speed at which maximum power is achieved.
➁
At 6000 RPM (engine cold) with headlamp turned on.
➂
Force applied midway between pulleys to obtain specified deflection.
BTDC: Before Top Dead Center
ATDC: After Top Dead Center
PTO: Power Take OFF side
MAG: Magneto side
MODEL
MX Zx 440 LC
Engine Type
454
Maximum HP RPM
➀
± 100 RPM
8450
Rotary Valve
P/N
Opening (BTDC)/
Closing (ATDC)
420 924 502
146
65
Carburetor Type
PTO VM 34 - 498
MAG VM 34 - 499
Main Jet
PTO 260
MAG 250
Needle Jet
P-8 (159)
Pilot Jet
45
Needle Identification — Clip Position
6FJ43
Slide Cutaway
2.5
Float Adjustment
± 1 mm (in)
23.9 (.94)
Air Screw Adjustment
± 1/16 turn
1
Idle Speed RPM
± 200 RPM
1700
Gas Grade/Pump Octane Number
(R + M)/2
Regular Unleaded/87
Gas/Oil Ratio
Premix 40:1 with Bombardier synthetic injection oil
Ignition Timing BTDC
➁
mm (in)
1.48 (.058)
Trigger Coil Air Gap
mm
(in)
0.55 - 1.45
(.022 - .057)
Gear Ratio
teeth
23/43
Engagement Speed
± 100 RPM
4900
Drive Pulley Calibration Screw Position
3
Pulley Distance
Z
(+0, –1) mm
(+0, –1/32) in
16.5
(21/32)
Offset
X
± 0.4 mm
(± 1/64 in)
35.0
(1-3/8)
Y
Dimension Y must exceed X from
1 mm (1/32 in) to 2 mm (5/64 in)
Drive Belt Adjustment
Deflection
± .5 mm
(in)
32
(1-1/4)
Force
➂
kg (lbf)
11.34 (25)
Driven Pulley Preload
± 0.7 kg (lbf)
7.0 (15.43)
Drive Chain Tension
Fully tighten adjusting screw by hand then back OFF
only far enough for hair pin installation
Track Adjustment
Deflection
mm
(in)
30 to 35 (1-3/16 - 1-3/8)
with a 7.3 kg (16 lb) downward pull