2001-2012 Polaris Sportsman 90 Youth ATV Service Manual (P/N 9918068)
Polaris Models Covered & Key Technical Specifications
Models: Polaris Sportsman 90, Scrambler 90, Scrambler 50
Sub-models / Variants: 2-Stroke Horizontal, Electric/Kick Start
Model Years: 2001–2012
Serial Numbers: 4XAE A05A* 1P000000
Technical Data:
- Engine displacement: 89.2 cc (Sportsman 90/Scrambler 90), 49.3 cc (Scrambler 50)
- Engine type: 2-Stroke Horizontal, 1 cylinder
- Compression ratio: 5.8:1 (90 cc), 6.8:1 (50 cc)
- Fuel type: 87 Octane Unleaded
- Fuel capacity: 1.32 Gallons (5 Liters)
- Transmission type: Automatic (C.V.T. System)
- Alternator output: 70 Watts @ 4000 RPM
- Ignition timing: 16° @ 1500 RPM (90 cc), 14° @ 1500 RPM (50 cc)
- Dry weight: 238.1 lbs. (108 kg) (Sportsman 90)
Polaris Manual Features & Content Preview
- Covers 2001–2012 Polaris Sportsman 90, Scrambler 90, and Scrambler 50 youth ATV models equipped with 2-stroke horizontal engines and CVT systems.
- Official Polaris OEM publication (P/N 9918068), initially covering the 2001 launch with technical updates applicable through the 2012 model year.
- Contains four primary chapters featuring 12 distinct torque specification tables and 15 mechanical exploded-view diagrams.
- Provides foundational mechanical geometry, engine specifications, and fastener torque standards for the A01FA09CA chassis.
- Details essential steering and fuel system data tailored specifically for the youth-series ATV line.
Manual Content Walkthrough
This publication starts with essential shop references, documenting VIN identification, paint codes, and standard unit conversion charts. From there, it dives deep into specialized engine disassembly and assembly workflows. You will find detailed breakdowns of the crankcase, piston, and oil pump systems alongside the necessary factory tool part numbers. The documentation also outlines body, steering, and suspension geometry, providing clear alignment methods and frame inspection criteria for structural verification.
Engine and Chassis Data Preview
Fuel system documentation features exploded views of the carburetor and explains operational theory across the pilot, needle jet, and main systems. Fastener specs are exact. For example, cylinder head bolt torque is rated at 14 ft.lbs (19 Nm). You will also find critical engine tolerances like the crankshaft runout, documented precisely at 0.004 inches on the MAG side. Chassis adjustments include a standard brake lever free play of 0.40 to 0.80 inches, while transmission gear case lubricant capacity is set at 10 fl.oz. (300 ml). Working on youth ATVs requires strict adherence to factory safety standards. Always ensure proper technical training and consult a certified technician before performing any mechanical service to maintain equipment integrity.
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