1998 Sport 400 W98Ba38C (Engine - Ec-38Ple-07) - Specifications And Clutching And Jetting Guidelines For Altitude And Temperature - Polaris Magnum 2x4 Service Manual

FUEL SYSTEM/CARBURETION
1998 Specifications
1998 SPORT 400
W98BA38C
(Engine - EC-38PLE-07)
SPECIFICATIONS AND CLUTCHING AND JETTING GUIDELINES
FOR ALTITUDE AND TEMPERATURE
Carburetor, Mikuni VM34SS
Main Jet - 230 Pilot Jet - 35 Float Level - Float arm parallel with bowl gasket suriace (Page 4.22)
Jet Needle - 6CEY6-3 Needle Jet - 0-6 (480) Air Screw - 1.5 Turns*
Needle Seat 2.5 (Large Diameter)
Flywheel Marking: FF95 CDI Marking: CU2515 Alternator Output: 150 Watts
Ignition Timing: 23.5° BTDC
@
3000 RPM (± 3°) Spark Plug: BR8ES Gap: .028 (.7mm)
Operating RPM: 5700 (± 200) Idle RPM: 600 (± 100)
Observe the following altitude recommendations and set up the vehicle accordingly.
Altitude AMBIENT Below O°F 0° to 40°F +40° to +80°F +80°F
&
Above
TEMPERATURE
(Below -18°C) (-18°C to +SOC) (+soC to +26°C)
(+26°C
&
Above)
Meters 0-900
270 250
230
210
(Feet) (0-3000)
Air Screw .5 Turn Air Screw 1.0 Turn Air Screw 1.5 Turn Air Screw 1.5 Turn
900-1800
250 230 210 195
(3000-6000 )
Air Screw .5 Turn Air Screw 1.0 Turn Air Screw 1.5 Turn AirScrew 1.75 Turn
1800-2700
220 210 195
.... :.:
..
175
(6000-9000)
Air Screw 1.5 Turn Air Screw 1.5 Turn Air Screw 1.75.Turn Air Screw 1. 75 Turn
2700-3700
200
190··:··.
.....
175
160
(9000-12000)
Air Screw 1.5 Turn
Air Screw 1;75 Turn· . • . . .
Screw .1.75 Turn AirScrew 1.75 Turn
"--_ ..... 1 - Turn Air Screw out
1/4
turn
Clutching
Altitude Shift Clutch Driven
Weight Spring
Helix
Meters 0-900 S-55 White 2/2
(Feet)
(0-3000)
900-1800 8-55 White
2/2 or 2/1
(3000-6000)
1800-2700 8 White 2/1
(6000-9000)
2700-3700 S orC White 2/1
(9000-12000)
Polaris Industries Inc. 4.4i
5/98
..