Unison Desert Cat 50 & 90cc Service Manual

Desert Cat service documentation covering Mikuni carburetors, C.D.I. ignition, and CVT transmission systems with complete maintenance schedules and engine specifications.

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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Unison Models Covered & Key Technical Specifications

Models: Unison Desert Cat 50, Unison Desert Cat 90
Sub-models / Variants: DS50, DS90, 2-Stroke Horizontal, Automatic (C.V.T.)
Build Years: 2007
Technical Data:

  • Engine Displacement: 49cc (DS50), 82.5cc (DS90)
  • Compression Ratio: 7.2:1 (DS50), 6.0:1 (DS90)
  • Spark Plug Gap: 0.7–0.8 mm
  • Idle Speed: 1800±100 rpm
  • Transmission Type: Automatic C.V.T.
  • Electrical System: 12V 7AMP Battery
  • Tire Pressure: 2–10 psi
  • Cylinder Head Bolt Torque: 10–15 ft-lbs (1.4–2.0 kg-m)
Technical Specifications
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Document Number / Seller:
25145 / Douglas Harris
File Size:
5.25 MB
File Type:
PDF
Language:
Pages:
69
Printable:
Yes
Category:
ATV
Last updated / verified
Aug 13, 2025

Unison Manual Features & Content Preview

2007 Unison Desert Cat 50 & 90cc Technical Documentation

  • Covers 2007 Unison Desert Cat 50 and 90cc ATVs, documenting both the 49cc and 82.5cc 2-stroke horizontal engine variants
  • Original OEM publication provided in digital format, featuring clear assembly illustrations for every major system
  • Contains 47 exploded-view diagrams and 14 technical torque specification tables for critical fasteners
  • Delivered as a direct download the moment payment clears
  • Indexed PDF search covers every chapter and appendix
  • Stored against your account so you can retrieve it after a hard-drive loss
  • This specific edition provides the factory-authorized settings for the Mikuni M1A and M2A carburetor systems used across the DS50 and DS90 range

Service and Maintenance Overview

The 2007 Unison Desert Cat 50 & 90cc service manual provides technical data and maintenance procedures for the Desert Cat ATV range. Chapters detail the fuel system, lubrication, cooling, combustion components, transmission, and frame assemblies. The maintenance section outlines service intervals for the drive chain, brake systems, and steering geometry.

Engine and Chassis Specifications

Engine data includes cylinder head flatness limits, piston-to-cylinder clearance, and crankshaft run-out specifications. The manual provides reference values for the A.C.G. generator, starter motor, and ignition coil testing. Cylinder head bolt torque is specified at 10–15 ft-lbs (1.4–2.0 kg-m) in the engine assembly section. Recommended gear oil is SAE90, and the recommended spark plug is the NGK BPR8HS. Brake lever free play is documented at 15–20 mm in the chassis maintenance table. This 69-page factory document is the definitive reference for servicing the 2007 Unison Desert Cat 50 & 90cc, providing detailed specifications for the engine, chassis, and electrical system of the DS-series build.

Manual FAQ, Purchase & Download Details

Does this manual include reference tables for torque settings and maintenance data? keyboard_arrow_down

Document contains comprehensive specification tables that list torque values for engine and frame components, alongside maintenance data categories like spark plug gaps and fluid types.

What information does the manual provide for the electrical system and ignition components? keyboard_arrow_down

Manual features sections covering electrical system troubleshooting, battery procedures, and ignition coil inspections. These parts of the document provide descriptive references for the 12V-7AMP battery system and standard ignition settings.

Which specific details confirm this is the official service document for the Unison Desert Cat 50 and 90cc series? keyboard_arrow_down

69-page service manual is tailored for the 2007 Unison Desert Cat 50 and 90cc ATV models. It serves as a consolidated engineering reference for the Desert Cat series collection. The document is provided in a portable PDF format for digital access.

Can I find wiring diagrams or connector pinout references within the electrical system chapters? keyboard_arrow_down

Electrical system section includes detailed references and descriptions for wire connectors, starter motor operation, and ignition coil checks.

Is there a reference table for fluid capacities and lubricant specifications? keyboard_arrow_down

Manual contains a dedicated maintenance data table that lists fluid capacities for the gear oil and engine oil systems. These specifications assist in identifying the correct grades and volumes for the machine.

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