9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
© Copyright Polaris Inc.
1.55
ENGINE SPECIFICATIONS
Engine Type
Patriot Liquid-Cooled /
Case Reed Induction
Model Number
S6185-8444-LO8R
Displacement
840 cc
Number of Cylinders
2
Bore & Stroke
85 x 74 mm
Operating RPM ± 150
8250
Idle RPM ± 200
1800
Engagement RPM ± 200
3800
Thermostat Opening
Temperature
80-87 ° F / 29.7-30.6 ° C
FUEL SYSTEM
Type - Number of Fuel
Injectors
DC-CFI - 2
Throttle Body Marking
1205875
Throttle Body Bore
50 mm
TPS Voltage @ Idle
(Using Digital Wrench)
0.86 +/- 0.05 VDC
Fuel Pressure
58-60 PSI / 4.0-4.1 bar
Fuel Octane (R+M/2)
10% Ethanol Mode
Premium Mode
<91 Octane
(Non-Oxygenated)
OR
87/89/91+
(Up to 10% Oxygenated)
91+
(Non-Oxygenated)
TRACK
Width
15 in / 38 cm
Length
155 in / 393.7 cm
Pitch
3.5 in / 8.89 cm
Lug Height
2.75 in. / 6.99 cm (Series 8)
Track Tension
0.50 - 0.625 in / 1.3 - 1.6 cm
Stud Protection
Maximum Stud Length
N/A
ELECTRICAL
Alternator Output
Operating Voltage
Watts @ 13.5 VDC (Total)
13.5-14.5 VDC
500
Idle Ignition Timing
(Variable - Based on RPM,
Pressure, and Temp.)
2° – 20°
Spark Plug
NGK BPR9ES
Spark Plug Gap
.027 in / .70 mm
FRONT SUSPENSION
Front Suspension Type
AXYS RMK React
Front Shock
Walker Evans Hi-Lo Comp.
Adj Velocity*
Front Travel
9.0 in / 22.9 cm
Ski Type
Gripper
Ski Center Distance
Setup Width
36 - 37- 38in / 91.4 - 93.9-
96.5 cm
36.85 in / 93.6 cm
Overall Toe Out
1/8 - 1/4 in / 3 - 6 cm
* = Reference Steering / Suspension chapter for shock
settings.
REAR SUSPENSION
Rear Suspension Type
RMK KHAOS
Front Track Shock (FTS)
Walker Evans Comp. Adj
Velocity 2"*
Rear Track Shock (RTS)
Walker Evans Comp. Adj.
Velocity*
Rear Travel
16.0 in / 40.6 cm
* = Reference Steering / Suspension chapter for shock
settings.
For clutch settings; See 850 PRO-RMK / RMK Khaos
(155/163/165) Clutch Settings page 1.61 later in this
chapter.
Summary of Contents for 850 PRO-RMK 155 2.6" QD 2021
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