Advertisement
Carburetor Jetting
AMBIENT
Below
TEMPERA-
-20°F
TURE
Below
-29°C
390
0-900
(0-3000)
(0 3000)
Alti-
Alti-
350
tude
900-1800
Me-
Me-
(3000-6000)
(3000-6000)
ters
(Feet)
(Feet)
320
1800-2700
(6000-9000)
280
2700-3700
(9000-12000)
#3 jet needle position for all
Production = 350 main jet for 0_F at 0-1000 feet with 92 octane non-ethanol fuel, the key switch in the 92 octane
position, and the timing curve position "D".
This engine is jetted for operation at 0 degrees and warmer. Re-jetting is required for temperatures colder than 0_ F.
TIMING INFORMATION
The PRO X 440 has been equipped with two switches that will change the timing curve.
The first switch is an ignition switch located on the console.
This switch is used to match the timing curve to the type of
fuel you are using. The fuel types are 92 octane non-ethanol
premium fuel and 110 octane fuel. Do not run the machine in
the wrong ingnition key position or engine damage will oc-
cur.
The second switch is located on the airbox and has seven optional curves. These seven options are used to match the fuel
type and the racing conditions which may vary, depending on the race. The standard position is "D" and should not be moved
unless you are a knowledgeable engine tuner.
Position
A
B
C
D (Standard Position)
E
F
G
The exhaust system has a temperature sensor in the body of the pipe that effects the timing curve as the temperature
changes. This feature helps the pipe tune quickly and is not adjustable.
+10°F -
Above
-20°F to
+40°F
+40°F
+10°
-12°C -
Above
-29°C to
+5°C
+5°C
-12°C
370
340
320
330
310
290
300
280
260
270
250
230
CAUTION
Timing Effect
+3
+2
+1
0
--2
--3
--4
Clutching Chart
Altitude
Shift
Clutch
Weight
Meters
Spring
(Feet)
S53H
Almond
0-900
0-3000
0-3000
S51H
Almond
900-1800
(3000-6000)
(3000-6000)
Almond
S49H
1800-2700
(6000-9000)
Almond
S49H
2700-3700
(9000-12000)
CAUTION
Mis-use of the timing se-
lector switch can cause
serious engine damage.
Running the machine in
the wrong ignition key
position will cause engine
damage.
Drive
Driven
Driven
Clutch
Helix
Spring
#2
R49
Red
Red
Blue /
Blue /
Orange
#3
R49
Red
Red
Blue /
Blue /
Orange
#3
R49
Red
Blue /
Orange
#3
R49
Red
Blue /
Orange
Ignition Switch
Positions
Chain-
case
Gearing
22:43
74P
74P
22:43
74P
74P
22:43
74P
22:43
74P
OFF
ON
110 OCT.
ON
92 OCT.
Advertisement
