General Information/ Foreword
Specifications NOTE: Specifications subject to change without notice.
This Service Manual contains service, maintenance, and troubleshooting information for the 2020 Alterra 90 and is designed to aid service personnel in service-oriented applications. This manual is divided into sections. Each section covers a specific ATV component or system and, in addition to the standard service procedures, includes disassembling, inspecting, and assembling instructions. When using this manual as a guide, the technician should use discretion as to how much disassembly is needed to address any given condition. This service manual is designed primarily for use by a CatMaster Basic Level technician. The procedures found in this manual are of varying difficulty, and certain service procedures in this manual require one or more special tools to be completed. The technician should use sound judgment when determining which procedures can be completed based on their skill level and access to appropriate special tools. NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is necessary. When replacement of parts is necessary, use only genuine parts. They are precision-made to ensure high quality and correct fit. Refer to the appropriate Illustrated Parts Manual for the correct part number, quantity, and description.
ATV publications and decals display the words Warning, Caution, Note, and At This Point to emphasize important information. The symbol ! WARNING identifies personal safety-related information. Be sure to follow the directive because it deals with the possibility of serious injury or even death. A CAUTION identifies unsafe practices which may result in ATV-related damage. Follow the directive because it deals with the possibility of damaging part or parts of the ATV. The symbol NOTE: identifies supplementary information worthy of particular attention. The symbol AT THIS POINT directs the technician to certain and specific procedures to promote efficiency and to improve clarity. At the time of publication, all information, photographs, and illustrations were technically correct. Some photographs used in this manual are used for clarity purposes only and are not designed to depict actual conditions. Because products are constantly refined and improved, no retroactive obligation is incurred. All materials and specifications are subject to change without notice. Product Service and Warranty Department Arctic Cat
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Length (Overall) Height (Overall) Width (Overall) Tire Size Tire Inflation Pressure
CHASSIS 146.8 cm (57.8 in.) 96.2 cm (37.9 in.) 87.6 cm (34.5 in.) (Front) AT20 x 7-8 (Rear) AT19 x 8-8
0.21 kg-cm2 (3.0 psi) MISCELLANEOUS Engine Displacement 89.9 cc (5.5 cu. in.) Bore x Stroke 47 x 51.8 mm (1.85 x 2.04 in.) Spark Plug Type CR7HSA Spark Plug Gap 0.6-0.7 mm (0.024-0.028 in.) Dry Weight (Approx) 120.2 kg (265 lb) Gas Tank Capacity 5.7 L (1.5 U.S. gal.) Reserve Capacity 1.3 L (0.34 U.S. gal.) Transmission Lubricant SAE 80W-90 Hypoid (Recommended) Transmission Lubricant Capacity 250 ml (8.4 fl oz) Engine Oil Capacity 0.8 L (0.84 U.S. qt) Gasoline (Recommended) 87 Octane Regular Unleaded Engine Oil (Recommended) ACX All Weather (Synthetic) Headlight 12V/15W Brake Light 12V/21W/15W FUEL SYSTEM Carburetor Type Keihin PTE Main Jet 80 Slow Jet 40 Idle Screw Setting (turns out) 2 1/2 Jet Needle NQL-8 Idle RPM 1800 Throttle Slide G8C Float Height 10.2 mm (0.40 in.) Throttle Cable Free-Play (at lever) 6.0 mm (0.25 in.) ELECTRICAL SYSTEM Ignition Timing 13° BTDC (“F” Mark) @ 1800 RPM Ignition Type CDI Spark Plug Cap 4725-5775 ohms Ignition Coil (primary) Less than 1 ohm Resistance (secondary) 2830-3170 ohms Timing Sensor (resistance) 80-160 ohms Regulator/Rectifier 12.1-15.2 DC volts@ 3000 RPM Stator Coil (no load) 13.5-16.5 AC volts @3000 RPM Stator Coil Resistance Less than 1 ohm Choke Circuit (voltage) 3.5-4.5 AC volts
