Polaris 850 MATRYX INDY XC 129 2021 User manual

FOREWORD
The information printed within this publication includes the latest product information at time of print. The most recent
version of this Service Manual is available in electronic format at www.polarisdealers.com.
This Service Manual is designed primarily for use by certified Polaris Master Service Dealer®technicians in a properly
equipped shop and should be kept available for reference. All references to left and right side of the vehicle are from
the operator's perspective when seated in a normal riding position.
Some procedures outlined in this manual require a sound knowledge of mechanical theory, tool use, and shop
procedures in order to perform the work safely and correctly. Technicians should read the text and be familiar with the
service procedures before starting any repair. Certain procedures require the use of special tools. Use only the proper
tools as specified. If you have any doubt as to your ability to perform any of the procedures outlined in this Service
Manual, contact an authorized dealer for service.
We value your input and appreciate any assistance you can provide in helping make these publications more useful.
Please provide any feedback you may have regarding this manual. Authorized dealers can submit feedback using 'Ask
Polaris'. Click on 'Ask Polaris', and then click on 'Service Manual / Service Literature Question'.
Consumers, please provide your feedback in writing to: Polaris Industries Inc. ATTN: Service Publications Department,
2100 Hwy 55, Medina, MN 55340.
Publication Printed October 2020 (PN 9850064 R03)
© Copyright 2020 Polaris Inc. All information contained within this publication is based on the latest product information at the time of publication. Due to constant
improvements in the design and quality of production components, some minor discrepancies may result between the actual vehicle and the information presented in this
publication. Depictions and/or procedures in this publication are intended for reference use only. No liability can be accepted for omissions or inaccuracies. Any reprinting
or reuse of the depictions and/or procedures contained within, whether whole or in part, is expressly prohibited. Printed in U.S.A.
2021 650 / 850 Matryx Trail Performance /
Crossover Snowmobile

SAFETY WARNINGS
The following signal words and symbols appear throughout this manual and on the vehicle. Your safety is involved
when these words and symbols are used. Become familiar with their meanings before reading the manual.
DANGER
DANGER indicates a hazardous situation which, if not avoided, WILL result in death or serious injury.
WARNING
SAFETY ALERT WARNING indicates a hazardous situation which, if not avoided, COULD result in death or serious
injury.
CAUTION
SAFETY ALERT CAUTION indicates a hazardous situation which, if not avoided, COULD result in minor to moderate
injury.
NOTICE
NOTICE provides key information by clarifying instructions.
IMPORTANT
IMPORTANT provides key reminders during disassembly, assembly and inspection of components.

TRADEMARKS
POLARIS ACKNOWLEDGES THE FOLLOWING PRODUCTS MENTIONED IN THIS MANUAL:
Loctite, Registered Trademark of the Loctite Corporation
Nyogel, Trademark of Wm. F. Nye Co.
Fluke, Registered Trademark of John Fluke Mfg. Co.
Mity-Vac, Registered Trademark of Neward Enterprises, Inc.
Torx, Registered Trademark of Textron
Hilliard, Trademark of the Hilliard Corporation
Warn, Trademark of Warn Industries
FOX, Registered Trademark of FOX RACING SHOX
RydeFX, Registered Trademark of ArvinMeritor
Some Polaris factory publications can be downloaded from www.polarisindustries.com, purchased from
www.purepolaris.com or by contacting the nearest Polaris dealer.

REVISION INDEX
REV DATE CHANGES
R01 10/01/2020 Initial Release
R02 11/06/2020 Added Shock Mounting Assembly Views
R03 02/23/2021
Added smartwarmers diagnostic information; Revised specification in jack
shaft removal; Revised Crankshaft Position Sensor (CPS) specification;
Revised PBR Update / Replacement procedure
FEEDBACK FORM
A feedback form has been created for the technician or consumer to provide Polaris
with an overall satisfaction rating for this service manual, provide comments on your
experience or upload pictures/video. This feedback form is viewable on a mobile
device by scanning the QR code or by clicking HERE if viewing this document
electronically.

2021 650 / 850 Matryx Trail Performance / Crossover
Snowmobile
Service Manual
Chapter Summary
CHAPTER 1 : GENERAL INFORMATION
CHAPTER 2 : MAINTENANCE
CHAPTER 3 : ENGINE / COOLING / EXHAUST
CHAPTER 4 : ENGINE ELECTRICAL
CHAPTER 5 : FUEL SYSTEM
CHAPTER 6 : FINAL DRIVE / BRAKE SYSTEMS
CHAPTER 7 : PVT SYSTEM
CHAPTER 8 : STEERING / SUSPENSIONS
CHAPTER 9 : CHASSIS
CHAPTER 10 : BATTERY / ELECTRICAL

1
9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
© Copyright Polaris Inc. 1.1
GENERAL INFORMATION
CHAPTER 1
GENERAL INFORMATION
VEHICLE IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3
MODEL NUMBER DESIGNATION (2017 +) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3
VEHICLE IDENTIFICATION NUMBER (VIN) DESIGNATION (2017 +). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3
TUNNEL DECAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3
VEHICLE IDENTIFICATION NUMBER LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4
ENGINE SERIAL NUMBER LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5
REFERENCE INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6
REPLACEMENT KEYS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6
PUBLICATION PART NUMBERS - 2021. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.7
MODEL SPECIFICATIONS (MODEL YEAR 2021). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8
MODEL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8
CLUTCH SETTINGS (MODEL YEAR 2021). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.13
650 INDY XC / INDY VR1 129 / 137 CLUTCH SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.13
850 INDY XC / INDY VR1 129 / 137 CLUTCH SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.13
650 SWITCHBACK ASSAULT 146 CLUTCH SETTINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.14
850 SWITCHBACK ASSAULT 146 CLUTCH SETTINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.14
MISC SPECIFICATIONS AND CHARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.15
MASTER TORQUE TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.15
CONVERSION TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.21
SAE TAP / DRILL SIZES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.22
METRIC TAP / DRILL SIZES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.22
DECIMAL EQUIVALENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.23
FUEL RECOMMENDATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.24
FUEL SYSTEM DEICERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.24
SERVICE PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.25
GENERAL DIAGNOSTICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.26
DIAGNOSTIC TROUBLE CODES (DTC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.26
DIAGNOSTIC TROUBLE CODES (DTCS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.26
DIAGNOSTIC TROUBLE CODES (DTCS) - LEFT HAND CONTROL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.32
DC-CFI AXYS DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.33
TROUBLESHOOTING - ENGINE WILL NOT START . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.33
PERFORMANCE TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.34
DIGITAL WRENCH DIAGNOSTIC SOFTWARE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.36
DIGITAL WRENCH DIAGNOSTIC SOFTWARE OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.36
DIGITAL WRENCH SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.36
DIGITAL WRENCH SOFTWARE VERSION / UPDATE ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.37
DIGITAL WRENCH – UPDATING SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.37
DIGITAL WRENCH® COMMUNICATION ERRORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.38
DIGITAL WRENCH® FEATURE MAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.39
DIGITAL WRENCH – SYSTEM CONFIGURATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.40

1.2 9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
© Copyright Polaris Inc.
DIGITAL WRENCH – DIAGNOSTIC TROUBLE CODES (DTCS) DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.41
DIGITAL WRENCH – DATA LIST DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.42
DIGITAL WRENCH – METERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.42
DIGITAL WRENCH – DATA TRIGGER (FREEZE FRAME) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.43
DIGITAL WRENCH – SPECIAL TESTS MENU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.44
DIGITAL WRENCH – VEHICLE HISTORICAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.44
DIGITAL WRENCH – OUTPUT STATE CONTROL TESTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.45
DIGITAL WRENCH – SERVICE REPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.46
DIGITAL WRENCH – ECU / INJECTOR / OIL PUMP REPLACEMENT MENU . . . . . . . . . . . . . . . . . . . . . . . . . .1.47
DIGITAL WRENCH – ECU REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.47
DIGITAL WRENCH – FUEL INJECTOR REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.51
DIGITAL WRENCH - ELECTRONIC OIL PUMP FLOW OFFSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.53
DIGITAL WRENCH - SERVICE PROCEDURES MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.55
FUEL INJECTOR BREAK-IN TIMER RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.55
OIL PUMP ENRICHMENT MODE TIMER RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.57
EV ACTUATOR LEARN PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.58
FUEL PUMP PRIME PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.61
GEARING CHANGE REPROGRAMMING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.63
ELECTRONIC OIL PUMP PRIME PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.64
DIGITAL WRENCH – ECU REPROGRAMMING (REFLASH). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.66
DIGITAL WRENCH – VEHICLE IDENTIFICATION INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.70
POLARIS MOBILE DIGITAL WRENCH® (PMDW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.72
PVT SYSTEM DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.73
DRIVE BELT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.73
DRIVE CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.73
DRIVEN CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.73
BELT WEAR / BURN DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.74
STEERING / SUSPENSION DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.75
SHOCK ANALYSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.75
ELECTRICAL DIAGNOSTICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.76
ELECTRICAL SERVICE NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.76
DIGITAL MULTI-METER (DMM) NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.76
STATIC AND DYNAMIC TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.76
CONNECTOR PROBING GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.77
TESTING CONTINUITY / RESISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.78
TESTING FOR A SHORT TO GROUND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.78
TESTING FOR A SHORT TO VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.79
TESTING FOR INTERMITTENT CONDITIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.80
TESTING CURRENT FLOW (AMPERAGE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.80
CURRENT DRAW - KEY OFF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.80
TESTING VOLTAGE DROP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.81
GENERAL INFORMATION

9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
© Copyright Polaris Inc. 1.3
VEHICLE IDENTIFICATION
MODEL NUMBER DESIGNATION (2017 +)
Example: S17SJA5BEA
GROUP MODEL YEAR MAKE LINE TYPE ENGINE SIZE /
MODIFIER MARKET OPTION
1st 2nd 3rd 4th* 5th* 6th* 7th* 8th* 9th 10th**
S 1 7 S J A 5 B E A
* = digits that would transfer to 17 digit VIN and are used in digits 4 - 8 respectively
** = 10th digit will be used on color / featured versions of models (not including the base)
First 3 digits, 9th digit and 10th digit are used in model number only. They are not used with the 17 digit VIN.
Digits 1 through 8 determine Digital Wrench calibration.
VEHICLE IDENTIFICATION NUMBER (VIN) DESIGNATION (2017 +)
Example: SN1CBA8G0G3000000
WORLD MFG.
ID
VEHICLE DESCRIPTORS VEHICLE IDENTIFIERS
MAK-
ELINE TYPE ENGINE
SIZE
ENGINE
MODIFIER
CHECK
DIGIT
MODEL
YEAR *
MFG.
LOCATION INDIVIDUAL SERIAL NO.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
S N 1 C B A 6 G 0 G 3 0 0 0 0 0 0
* Model Year: H = 2017; J = 2018; K = 2019; L = 2020; M = 2021
TUNNEL DECAL
The Tunnel Decal has the Model Number (1), VIN Number (2), and the Manufactured Date (3). These numbers should
be referred to in any correspondence regarding warranty, service, or replacement parts. The machine model and VIN
number identification decal is located on the right front side of the tunnel. The VIN (2) number is permanently stamped
into the tunnel. The model number is embossed on the decal.
GENERAL INFORMATION
1

1.4 9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
© Copyright Polaris Inc.
VEHICLE IDENTIFICATION NUMBER LOCATIONS
NOTICE
The Vehicle Identification Number (VIN) is stamped into the side of the tunnel and printed on the tunnel VIN label.
qCertification Label eEmissions Certification
wTunnel VIN / Model Number Label / Stamp
IMPORTANT
If installing an aftermarket tunnel wrap, do not cover the tunnel certification, tunnel VIN or emissions certification
labels with the wrap. If the tunnel wrap doesn’t provide an opening for these labels, remove the section of wrap where
the labels are located.
GENERAL INFORMATION

9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
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ENGINE SERIAL NUMBER LOCATION
The engine serial number is located on the identification
label qon the engine case next to the recoil cover.
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REFERENCE INFORMATION
REPLACEMENT KEYS
Replacement keys can be made from the original key. To identify which series the key is, take the first two digits on the
original key and refer to the chart to the right for the proper part number.
(i.e. In this example, the first two digits are 31 which would use key blank PN 4110141.)
SERIES# PART NUMBER
20 4010278
21 4010278
22 4010321
23 4010321
27 4010321
28 4010321
31 4110141
32 4110148
67 4010278
68 4010278
PUBLICATION PART NUMBERS - 2021
YEAR MODEL MODEL NUMBERS OWNER’S
MANUAL
2021
650 MATRYX INDY XC 129
850 MATRYX INDY XC 129
S21TKP6RS / S21TKP6RE
S21TKP8RS / S21TKP8RE
9931271
650 MATRYX INDY VR1 129
850 MATRYX INDY VR1 129
S21TKV6RS / S21TKV6RE
S21TKV8RS / S21TKV8RE
650 MATRYX INDY XC 137
850 MATRYX INDY XC 137
S21TDP6RS / S21TDP6RE
S21TDP8RS / S21TDP8RE
650 MATRYX INDY VR1 137
850 MATRYX INDY VR1 137
S21TDV6RS / S21TKV6RE
S21TDV8RS / S21TKV8RE
650 MATRYX SWITCHBACK ASSAULT
146
850 MATRYX SWITCHBACK ASSAULT
146
S21TLC6RS / S21TLC6RE
S21TLC8RS / S21TLC8RE
NOTICE
When ordering service parts be sure to use the correct parts manual.
Polaris factory publications can be found at www.polaris.com or purchased from www.purepolaris.com.
GENERAL INFORMATION

9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
© Copyright Polaris Inc. 1.7
SPECIAL TOOLS
Special tools may be required while servicing this vehicle. Some of the tools listed or depicted are mandatory, while
other tools may be substituted with a similar tool, if available. Polaris recommends the use of Polaris Special Tools
when servicing any Polaris product. Dealers may order special tools through the Polaris official tool supplier.
Bosch Automotive Service Solutions 1-800-345-2233 or https://polaris.service-solutions.com
GENERAL INFORMATION
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MODEL SPECIFICATIONS (MODEL YEAR 2021)
MODEL SPECIFICATIONS
MODEL MODEL NUMBERS MODEL IMAGE
650 INDY XC Launch Edition 129
850 INDY XC Launch Edition 129
S21TKP6RS / S21TKP6RE
S21TKP8RS / S21TKP8RE
*850 INDY XC 129 SHOWN
650 INDY VR1 129
850 INDY VR1 129
S21TKV6RS / S21TKV6RE
S21TKV8RS / S21TKV8RE
*850 INDY VR1 129 SHOWN
650 INDY XC Launch Edition 137
850 INDY XC Launch Edition 137
S21TDP6RS / S21TDP6RE
S21TDP8RS / S21TDP8RE
*850 INDY XC 137 SHOWN
GENERAL INFORMATION

9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
© Copyright Polaris Inc. 1.9
MODEL MODEL NUMBERS MODEL IMAGE
650 INDY VR1 137
850 INDY VR1 137
S21TDV6RS / S21TKV6RE
S21TDV8RS / S21TKV8RE
*850 INDY VR1 137 SHOWN
650 SWITCHBACK ASSAULT 146
850 SWITCHBACK ASSAULT 146
S21TLC6RS / S21TLC6RE
S21TLC8RS / S21TLC8RE
*850 SWITCHBACK ASSAULT 146
SHOWN
GENERAL INFORMATION
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1.10 9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
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GENERAL SPECIFICATIONS
129 MODELS 137 MODELS 146 MODELS
Width 47 in (119.4 cm) 47 in (119.4 cm) 47 in (119.4 cm)
Length 117 in (297 cm) 120 in (305 cm) 125 in (317.5 cm)
Height 46 in (116.8 cm) 46 in (116.8 cm) 54.5 in (138.4 cm)
Estimated Dry Weight
Standard Models
465 lb (211 kg)
489 lb (222 kg) - Electric Start
Standard Models
474 lb (215 kg)
498 lb (226 kg) - Electric Start 476 lb (216 kg)
500 lb (227 kg) - Electric Start
VR1 Models
467 lb (212 kg)
491 lb (223 kg) - Electric Start
VR1 Models
476 lb (216 kg)
500 lb (227 kg) - Electric Start
Fuel Capacity 11.5 gal (43.5 L)
Oil Capacity 3.75 qt (3.5 L)
Cooling System Capacity 4.0 qt (3.8 L)
Brake Fluid DOT 4
ENGINE
650 MODELS 850 MODELS
Engine Type Patriot Liquid-Cooled / Case Reed
Induction
Patriot Liquid-Cooled / Case Reed
Induction
Model Number S6095-6544-LO6R S6186-8444-LO8R
Displacement 650 cc 840 cc
Number of Cylinders 2 2
Bore & Stroke 74.8 x 74 mm 85 x 74 mm
Operating RPM ± 150 8250 8250
Idle RPM ± 200 1600 1800
Engagement RPM ± 200 3800 3000
Thermostat Opening Temperature 80-87 °F (29.7-30.6 °C)
FUEL SYSTEM
650 MODELS 850 MODELS
Type - Number of Fuel Injectors DC-CFI - 2
Throttle Body Marking 1206131 1205875
Throttle Body Bore 50 mm
TPS Voltage @ Idle
(Using Digital Wrench) 0.78 +/- 0.05 VDC 0.86 +/- 0.05 VDC
Fuel Pressure 42 to 49 psi (292 to 336 kPa) 57 to 62.5 psi (393 to 431 kPa)
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)
GENERAL INFORMATION

9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
© Copyright Polaris Inc. 1.11
DRIVETRAIN / TRACK
129 MODELS 137 MODELS 146 MODELS
Chaincase Center Distance 7.063 in (17.94 cm)
Chaincase Gearing SEE CLUTCHING SETTINGS
Chaincase Gear Lube Polaris Synthetic (30W)
Chaincase Capacity 8 - 10 oz (237 - 296 mL)
Reverse System PERC
Track Width 15 in (38 cm) 15 in (38 cm) 15 in (38 cm)
Track Length 129 in (327.7 cm) 137 in (347.98 cm) 146 in (370.8 cm)
Track Pitch 2.86 2.86 2.86
Track Lug Height
1.25 in (3.175 cm) - Ice Ripper
XT
1.352 in (3.43 cm) - Cobra
1.5 in (3.81 cm) - Storm 150
1.25 in (3.175 cm) - Ice Ripper
XT
1.352 in (3.43 cm) - Cobra
1.5 in (3.81 cm) - Storm 150
1.352 in (3.43 cm) - Cobra
Clipped
1.5 in (3.81 cm) - Ice Storm
1.6 in (4.06 cm) - Cobra
2.0 in (5.08 cm) - Crossover
Track Tension
7/8 - 1 1/8 in (2.2 - 2.6 cm)
Maintain 7/8 in (2.2 cm) when
studded.
7/8 - 1 1/8 in (2.2 - 2.6 cm)
Maintain 7/8 in (2.2 cm) when
studded.
7/8 - 1 1/8 in (2.2 - 2.6 cm)
Maintain 7/8 in (2.2 cm) when
studded.
Stud Protection
Units do not have integrated stud protection but accessory kits are available. Units built with pre-
studded tracks (Ice Ripper/Storm) will come from the factory with the stud protection installed.
Stud protection kits are designed to work with studded tracks that have no-greater than 0.375 in
(0.953 cm) of stud penetration (that is, distance of the stud above the lug-tip). Polaris does not
recommend studding anything above a 1.352 in (3.43 cm) Cobra track, although the stud
protection will work on a 1.6 in (4.06 cm) Cobra track on 146 models.
PVT SYSTEM
650 MODELS 850 MODELS
Drive Belt Part Number 3211165 3211215
Drive Belt Width 1.46 in (3.70 cm) 1.47 in (3.73 cm)
Drive Belt Side Angle 26° 28°
Drive Belt Circumference 45.16 in (114.7 cm) 45.16 in (114.7 cm)
Drive Belt Center Distance 10.625 in (26.98 cm) 10.625 in (26.98 cm)
FRONT SUSPENSION
129 MODELS 137 MODELS 146 MODELS
Front Suspension Type Matryx Front Suspension Matryx Front Suspension Matryx Front Suspension
Front Shock
Walker Evans Force*
or
Walker Evans Velocity*
Walker Evans Force*
or
Walker Evans Velocity*
Walker Evans 2" Velocity*
Front Travel 9.3 in (23.6 cm) 9.3 in (23.6 cm) 9.5 in (24.1 cm)
Ski Type PRO-STEER PRO-STEER PRO-STEER
Ski Center Distance
Setup Width
42.5 in (108 cm)
41.52 in (105 cm)
42.5 in (108 cm)
41.52 in (105 cm)
42.5 in (108 cm)
41.52 in (105 cm)
Overall Toe Out 1/8 - 1/4 in (3 - 6 cm) 1/8 - 1/4 in (3 - 6 cm) 1/8 - 1/4 in (3 - 6 cm)
* = Reference Steering / Suspension chapter for shock settings.
GENERAL INFORMATION
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1.12 9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
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REAR SUSPENSION
129 MODELS 137 MODELS 146 MODELS
Rear Suspension Type PRO-CC PRO-CC IGX 146
Front Track Shock (FTS)
Walker Evans Force*
or
Walker Evans Comp. Adj. 2"
Piggyback*
Walker Evans Force*
or
Walker Evans Comp. Adj. 2"
Piggyback*
Walker Evans Comp. Adj. 2"
Piggyback*
Rear Track Shock (RTS) Walker Evans Velocity* Walker Evans Velocity* Walker Evans Velocity*
Rear Travel 16.2 in (41.1 cm) 16.2 in (41.1 cm) 16.0 in (40.6 cm)
* = Reference Steering / Suspension chapter for shock settings.
ELECTRICAL
650 MODELS 850 MODELS
Alternator Output
Operating Voltage
Watts @ 13.5 VDC (Total)
13.5-14.5 VDC
500w @ 5000 rpm
Idle Ignition Timing
(Variable - Based on RPM, Pressure, and
Temp.)
6° – 30°
Spark Plug NGK BPR9ES
Spark Plug Gap .27 in (.70 mm)
For clutch settings; See later in this chapter.
GENERAL INFORMATION

9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
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CLUTCH SETTINGS (MODEL YEAR 2021)
650 INDY XC / INDY VR1 129 / 137 CLUTCH SETTINGS
CLUTCH SETTINGS
ALTITUDE
meters (feet)
DRIVE CLUTCH DRIVEN CLUTCH CHAINCASE
Shift Weight Clutch
Spring Clutch Spring Driven Helix Gearing / Pitch
0-600 (0-2000) 10-66 (1321584)
120/320
(7044537)
Black
155/222
(7043063)
58/44/.36
(5143872)
20:36 66P
1.25 Ice Ripper
XT
1.352 Cobra
22:41 70P
1.5 Storm
600-1200 (2000-4000) 10-64 (1321585)
1200-1800 (4000-6000)
10-62 (1321586)
1800-2400 (6000-8000)
140/330
(7043829)
2400-3000 (8000-10,000) 10-60 (1321587) 21:42 70P
1.25 Ice Ripper
XT
1.352 Cobra
1.5 Storm
3000-3600 (10,000-
12,000) 10-58 (1321588)
* Shaded cells indicate factory settings. Use 2 gram lighter shift weights when operating in temperatures above 40° F (5° C).
Drive Clutch Bolt Torque: 80 ft-lbs (108 Nm) Re-torque after running engine.
850 INDY XC / INDY VR1 129 / 137 CLUTCH SETTINGS
CLUTCH SETTINGS
ALTITUDE
meters (feet)
DRIVE CLUTCH DRIVEN CLUTCH CHAINCASE
Shift Weight Clutch
Spring Clutch Spring Driven Helix Gearing / Pitch
0-600 (0-2000) 10-72 (1322428)
Almond/Gold
(7041645)
Black
155/222
(7043063)
58/44/.36
(5143872)
23:37 68P
1.25 Ice Ripper
XT
1.352 Cobra
22:41 70P
1.5 Storm
600-1200 (2000-4000) 10-70 (1322414)
1200-1800 (4000-6000)
10-68 (1322427)
1800-2400 (6000-8000)
140/330
(7043829)
2400-3000 (8000-10,000) 10-66 (1321584) 20:39 68P
1.25 Ice Ripper
XT
1.352 Cobra
21:42 70P
1.5 Storm
3000-3600 (10,000-
12,000) 10-64 (1321585)
* Shaded cells indicate factory settings. Use 2 gram lighter shift weights when operating in temperatures above 40° F (5° C).
Drive Clutch Bolt Torque: 80 ft-lbs (108 Nm) Re-torque after running engine.
GENERAL INFORMATION
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1.14 9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
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650 SWITCHBACK ASSAULT 146 CLUTCH SETTINGS
CLUTCH SETTINGS
ALTITUDE
meters (feet)
DRIVE CLUTCH DRIVEN CLUTCH CHAINCASE
Shift Weight Clutch
Spring Clutch Spring Driven Helix Gearing / Pitch
0-600 (0-2000) 10-66 (1321584)
120/320
(7044537)
Black
155/222
(7043063)
58/44/.36
(5143872)
20:36 66P
1.352 Cobra
20:39 68P
1.5 Ice Storm
1.6 Cobra
19:40 68P
2.0 Crossover
600-1200 (2000-4000) 10-64 (1321585)
1200-1800 (4000-6000)
10-62 (1321586)
1800-2400 (6000-8000)
140/330
(7043829)
2400-3000 (8000-10,000) 10-60 (1321587) 19:40 68P
1.352 Cobra
1.5 Ice Storm
1.6 Cobra
2.0 Crossover
3000-3600 (10,000-
12,000) 10-58 (1321588)
* Shaded cells indicate factory settings. Use 2 gram lighter shift weights when operating in temperatures above 40° F (5° C).
Drive Clutch Bolt Torque: 80 ft-lbs (108 Nm) Re-torque after running engine.
850 SWITCHBACK ASSAULT 146 CLUTCH SETTINGS
CLUTCH SETTINGS
ALTITUDE
meters (feet)
DRIVE CLUTCH DRIVEN CLUTCH CHAINCASE
Shift Weight Clutch
Spring Clutch Spring Driven Helix Gearing / Pitch
0-600 (0-2000) 10-72 (1322428)
Almond/Gold
(7041645)
Black
155/222
(7043063)
58/44/.36
(5143872)
23:40 70P
1.352 Cobra
22:41 70P
1.5 Ice Storm
1.6 Cobra
19:40 68P
2.0 Crossover
600-1200 (2000-4000) 10-70 (1322414)
1200-1800 (4000-6000)
10-68 (1322427)
1800-2400 (6000-8000)
140/330
(7043829)
2400-3000 (8000-10,000) 10-66 (1321584) 20:39 68P
1.352 Cobra
1.5 Ice Storm
1.6 Cobra
2.0 Crossover
3000-3600 (10,000-
12,000) 10-64 (1321585)
* Shaded cells indicate factory settings. Use 2 gram lighter shift weights when operating in temperatures above 40° F (5° C).
Drive Clutch Bolt Torque: 80 ft-lbs (108 Nm) Re-torque after running engine.
GENERAL INFORMATION