Kawasaki KX250F KX252A Service Manual 2017-2019 – KX252AH KX252AJ KX252AK Repair Workshop PDF

Description

The Kawasaki KX250F KX252A Service Manual is the complete workshop reference for the 2017-2019 KX250F motocross machine, covering the KX252AH, KX252AJ and KX252AK model codes under the single KX252A platform designation. Across 499 pages this Kawasaki KX250F service manual documents every major system on the bike, from the fuel-injected 249 cm³ four-stroke engine through the semi-double cradle frame, the New Uni-Trak rear suspension and the Digital DC-CDI ignition system. Whether you are rebuilding a top end, chasing a DFI service code, replacing fork seals or simply re-shimming valve clearances, the procedures, tolerances and torque values you need are printed here in the same sequence a Kawasaki technician would follow.

File Details

• Manual type: Motorcycle Service Manual
• Brand / publisher: Kawasaki Heavy Industries, Ltd. – Quality Assurance Division / Motorcycle & Engine Company
• Platform: KX252A
• Models covered: KX252AH, KX252AJ, KX252AK (KX250F)
• Model years: 2017, 2018, 2019
• Country codes referenced: AU, BR, CA, EU, TH, US
• Language: English
• Page count: 499
• File format: PDF
• Document number: 99924-1514-03

Chapters Covered in This Kawasaki KX250F KX252A Service Manual

• General Information – Before Servicing, Model Identification, General Specifications, Unit Conversion Table
• Periodic Maintenance – Maintenance Chart, Torque and Locking Agent, Specifications, Periodic Maintenance Procedures
• Fuel System (DFI) – DFI System, DFI Parts Location, Servicing Precautions, Troubleshooting, Self-Diagnosis, Service Codes, Throttle Sensor, Intake Air Pressure Sensor, Intake Air Temperature Sensor, Water Temperature Sensor, Crankshaft Sensor, Gear Position Switch, Vehicle-down Sensor, Downstream Injector, Upstream Injector, Fuel Pump, Ignition Coil, ECU, Fuel Line, Throttle Grip and Cable, Throttle Body Assy, Air Cleaner, Fuel Tank
• Cooling System – Coolant, Water Pump, Radiator
• Engine Top End – Cylinder Head Cover, Camshaft Chain Tensioner, Camshafts, Cylinder Head, Valves, Cylinder and Piston, Throttle Body Holder, Muffler
• Clutch – Clutch Lever and Cable, Clutch Cover and Right Engine Cover, Clutch
• Engine Lubrication System – Engine Oil and Oil Filter, Oil Pump, Oil Pressure
• Engine Removal/Installation
• Crankshaft/Transmission – Crankcase, Crankshaft, Transmission, Primary Gear, External Shift Mechanism, Kickstarter, Bearings/Oil Seals
• Wheels/Tires – Wheels (Rims), Tires, Hub Bearing
• Final Drive – Drive Chain, Sprockets
• Brakes – Brake Lever, Brake Pedal, Brake Fluid, Caliper, Brake Pad, Master Cylinder, Brake Disc, Brake Hose
• Suspension – Front Fork, Rear Shock Absorber, Swingarm, Tie-Rod, Rocker Arm, Uni-Trak Maintenance
• Steering – Steering, Handlebars
• Frame – Frame, Seat, Side Covers, Radiator Shroud, Number Plate, Fender, Footpegs
• Electrical System – Wiring Diagram (KX252AH and KX252AJ~), Precautions, Electrical Wiring, Flywheel Magneto, Charging System, Ignition System, Switches
• Appendix – Cable, Wire, and Hose Routing, Troubleshooting Guide, Model Application

Each chapter opens with an exploded-view illustration of the system components, complete with callouts showing which fasteners require a specified tightening torque, oil, grease or locking agent during assembly. From there the manual moves into specifications, special tools and sealants, then step-by-step removal, inspection, adjustment and installation text with captioned photographs throughout. The service-code and back-up tables in the Fuel System chapter are particularly valuable: they tell you exactly what the ECU does when a sensor drops out – for example, locking ignition timing to the fully-opened throttle position and switching to the D-J method when the throttle sensor signal leaves its usable range, or shutting off both injectors when the upstream or downstream injector circuit breaks.

What the KX252A Workshop Manual Covers In Practice

This is not a generic motocross manual. Every tolerance, torque figure and clearance printed here was written for the KX252A engine and chassis specifically, and it is exact. Valve clearances are given as 0.17-0.22 mm exhaust and 0.10-0.15 mm intake, with a full shim-selection formula (present shim thickness plus measured clearance minus specified clearance equals replacement shim thickness) and a complete shim part-number table from 1.300 up to 2.300. Cylinder inside diameter is 77.000-77.012 mm with a 77.10 mm service limit – and the manual notes clearly that the plated cylinder cannot be bored or honed, so if it is out of spec the cylinder is replaced. Piston-to-cylinder clearance runs 0.040-0.062 mm, and the piston diameter itself is measured 6 mm up from the skirt.

On the fuel side, the DFI chapter walks through the self-diagnosis system in detail: how to ground the self-diagnosis terminal to enter Dealer Mode 1 or Dealer Mode 2, how to read the long and short blinks of the orange FI warning indicator light, and a full service-code table covering codes 11 through 51. There is a fault-by-fault troubleshooting guide for “engine won’t turn over,” “poor running at low speed,” “poor running or no power at high speed,” and backfiring, with a list of possible causes and the exact chapter and action for each. Fuel pressure is specified as 294 kPa (3.0 kgf/cm², 43 psi) at idle for the KX252AH and 343 kPa (3.5 kgf/cm², 50 psi) for KX252AJ onward, with a flow-rate test giving 44 mL or more per 5 seconds on the AH and 39 mL on later models.

Torque Values, Service Limits and Adjustment Data

The Periodic Maintenance chapter holds a dense Torque and Locking Agent table running several pages: cylinder head bolts at 50 N·m, camshaft cap bolts at 10 N·m, clutch hub nut at 100 N·m, engine oil drain bolt at 20 N·m, swingarm pivot shaft nut at 100 N·m, rear axle nut at 110 N·m, front axle nut at 80 N·m, and dozens more, each with its N·m, kgf·m and ft·lb equivalent plus remarks telling you whether to apply molybdenum disulfide oil, a non-permanent locking agent, liquid gasket or to follow a specified tightening sequence. Because these are the values that keep a race engine together, having them in front of you rather than reconstructing them from memory is the whole point of owning a Kawasaki KX250F KX252A service manual.

Suspension data is equally specific. Front fork oil amounts are listed separately for the cylinder unit (330 mL, 115-123 mm oil level), the left outer tube (300 ±2.5 mL, adjustable 300-340 mL) and the right outer tube (223 ±2.5 mL on the KX252AH, 227 ±2.5 mL on KX252AJ onward), using Kawasaki SS-19 fork oil. Rear shock uses SS-25, roughly 380 mL, with gas pressure specified at 980-1 180 kPa. Compression and rebound click settings are given for every market variant, so whether your bike is a US, CA, AU, EUR, TH or BR build you can return the adjusters to stock.

Electrical, Wiring and Diagnostic Coverage

Two full-page wiring diagrams are included – one for the KX252AH and one for the KX252AJ~ – showing the ECU pinout, sensors, injectors, fuel pump, capacitor, ignition coil, gear position switch and the Kawasaki Diagnostic System connector, with an ECU terminal-name table running from pin 1 through pin 33. Individual sensor tests are given with the expected input voltage, output voltage and resistance at 20°C, plus instructions on using the needle adapter set to probe a sealed connector without damaging it. The Appendix closes with a cable, wire and hose routing section that shows exactly how the throttle cables, clutch cable, brake hoses, breather hose, magneto lead and gear position switch lead are meant to be run around the frame, number plate and radiator – a job that is easy to get wrong and hard to undo once the fuel tank is back on.

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Instant PDF Delivery, No Shipping, Works On Any Device

This Kawasaki KX250F service manual arrives as a single PDF you can download the moment your order clears. There is nothing to wait for in the post, nothing to lose, and no shelf space required. Open it on a laptop in the workshop, a tablet on the bench or a phone at the track, zoom into the exploded views and torque tables, and print the pages you need for a specific job so you can get them dirty without worrying about the rest of the book. The 499 pages are divided into the seventeen factory chapters listed above, so you can jump straight to the section covering the system in front of you instead of scrolling through unrelated content. For anyone maintaining, rebuilding or race-prepping a 2017, 2018 or 2019 KX250F, this is the reference that keeps the work correct the first time.