2008–2009 Suzuki DR-Z70 (DR-Z70K8 / DR-Z70K9) Factory Service Manual

This Suzuki factory service manual covers the 2008–2009 DR-Z70 mini-bikes, including the DR-Z70K8 and DR-Z70K9 air-cooled 67cc models for the U.S. (E-33) and Canada (E-28). The base manual carries Suzuki Motor Corporation's 2007 copyright and is accompanied by the K9 supplement.

Search and diagram detail: Searchable PDF text and embedded bookmarks cover the main sections and K9 supplement. Small wire-color codes in the full wiring diagram are easiest to read when zoomed in.

• Engine repair: Engine removal, cylinder-head and crankcase disassembly, valve-guide service, crankshaft inspection, cam-chain timing, and reassembly.

• Clutch and transmission: Automatic clutch engagement and lock-up checks, gearshifting clutch repair, starter-clutch inspection, and transmission service.

• Fuel system: MIKUNI VM13SH carburetor overhaul, float and needle-valve inspection, fuel-valve service, and early/late carburetor identification.

• Chassis: Inverted telescopic front-fork overhaul, steering-bearing service, swingarm bushing replacement, wheel-bearing inspection, and drum-brake repair.

• Electrical diagnosis: CDI ignition fault tracing, charging-system checks, starter-motor overhaul, switch tests, and circuit diagrams.

• Maintenance and service data: Periodic maintenance charts, intake/exhaust valve-clearance adjustment, D.I.D 428 chain inspection, compression and oil-pressure tests, torque tables, and wear limits.

This manual is written for mechanics with the knowledge, skills, and special tools required for Suzuki motorcycle service; it assumes general repair knowledge.

Engine Overhaul and Clutch Diagnosis

The engine chapter identifies components that can be serviced with the engine still in the frame. Internal repair includes valve-seat work, piston and ring inspection, crankshaft thrust-clearance measurement, and shim selection.

The first centrifugal clutch and separate gearshifting clutch have their own inspection procedures. Slipping and dragging complaints are separated by clutch type, helping you identify the relevant assembly before planning a repair.

The three-speed constant-mesh transmission section covers shaft assemblies, gears, and shift-fork clearances, with exploded views for transmission and clutch assembly.

Crankcase work calls for the 09920-13120 crankcase and shaft remover; clutch disassembly uses the 09920-33510 clutch spring compressor. The crankshaft installation cautions explain how striking it into the crankcase can disturb its alignment.

The Engine Lubrication System Chart traces oil flow through the pump, filter case, crankshaft, and cylinder head. Service tables distinguish oil-change and overhaul capacities and provide inspection data and torque settings, including front axle and muffler mounting fasteners. The oil-pump assembly is specified for replacement as a unit.

Carburetor Identification and the Serial Break

The base specifications identify the MIKUNI VM13SH, while the K9 specification sheet uses VM13 and refers to the K8 service data.

The carburetor update applies from frame JS1JB41A 82102256. It distinguishes early part 13200-14H00 from late part 13200-14H01, shows identification mark 1, and documents the revised air-screw preset and interchangeability. These references help match replacement carburetors to the correct configuration.

Needle-valve inspection addresses both overflow and restricted fuel supply. Cleaning cautions identify jet and passage damage caused by probing with wire.

Carburetor Hose Routing and Fuel Hose and Fuel Tank Breather Hose Routing drawings show the vent, overflow, and supply-line paths.

Forks, Steering and Rear Suspension

Front-fork service covers the springs, rubber stoppers, inner tubes, and reassembly orientation. Wheel and brake procedures include drum and shoe inspection, bearing replacement, and brake-cam alignment.

Rear suspension work covers shock removal, mounting bushings, and swingarm inspection. The rear shock absorber is not serviceable internally; the manual calls for replacement when it leaks or is damaged.

Charging, Starting and Ignition Faults

Troubleshooting charts address a battery that runs down, a starter that will not operate, and weak or missing spark. Tests cover generator output, the regulator/rectifier, ignition and pickup coils, and the starter relay.

The Wiring Diagram, Wiring Harness Routing, and Cable Routing views connect fault tracing with physical harness and control-cable layout. Electrical procedures identify the 09900-25008 multi-circuit tester and a peak-voltage adapter for ignition testing.

Before diagnostic work, teardown, or maintenance, follow Suzuki's precautions for gasoline, ignition-test shock hazards, and supporting the motorcycle.

PDF Contents and Included Supplements

The download is one printable, English-language PDF. Its 204 pages comprise 196 pages of base-manual content and introductory material, a one-page supplement index, the one-page carburetor update, the two-page K9 supplement, and four blank/separator pages.