Service specs
KYMCO Maxxer 300 Service Specs: Part Numbers and Intervals
Battery, spark plug, oil, filters, belt and torque for the KYMCO Maxxer 300: KYMCO service data with the genuine part number and diagram for each.
This is the service sheet for the KYMCO Maxxer 300 (4-stroke single, liquid cooled, 270 cc, carburetted, automatic with reverse, chain drive). It lists the battery, spark plug, filters, belt and the rest, each figure with the genuine KYMCO part number for the model years in our catalog (2019-2020) and the diagram the part is drawn on. The figures are KYMCO service data from the KYMCO ATV 300/250 service manual (Mongoose 300 / MAXXER 300, model LA60). When this page and your own manual disagree, the manual wins.
- Engine4-stroke singleliquid cooled, 270 cc, carburetted, automatic with reverse, chain drive
- Engine oilKYMCO SAE 15W-401.4 L at an oil change, 1.6 L dry
- Spark plugDPR7EA-9gap 0.8-0.9 mm
- BatteryYTX12-BS12 V
What to know before you order
The Maxxer 300 is the same LA60 machine as the Mongoose 270, and its service figures are identical: DPR7EA-9 plug, YTX12-BS battery, 1.4 L of SAE 15W-40 through a strainer screen, 300 cc of transmission oil. Our catalog lists the 2019 and 2020 Maxxer 300.
Maxxer 300 service specs at a glance
| Item | Spec | Genuine part number | Diagram |
|---|---|---|---|
| Batteryall models | 12 V; charge at 1.2 A for 5-10 h |  31500-KHE7-90A |
 F11 Battery |
| Spark plugall models | gap 0.8-0.9 mm |  98069-5791R-00 |
 E02 Cylinder Head Cover · Cylinder Head |
| Engine oil | KYMCO SAE 15W-40; 1.4 L at an oil change, 1.6 L dry | ||
| Oil filterall models | strainer screen behind the 30 mm cap |  15421-1G07-001 |
 E04 Right Crankcase Cover · Water Pump |
| Transmission oil | SAE 90; 300 cc at a change | ||
| Coolant | 1,400 cc total; replace every 24 months | ||
| Drive beltall models | width 23.6-24.4 mm new, replace at 22 mm |  23100-KHE7-90B |
 E05 Drive Pulley |
| Weight rollersall models | 23 mm OD new, replace at 22.8 mm |  22121-LBA7-305 |
E05 Drive Pulley |
| Brake padsall models | discs 3.8-4.2 mm new, 3.0 mm minimum |
 45105-KKC4-305 45105-LBA7-305 |
 F08 Rear Wheel |
| Tires | front 21 x 7-10, rear 20 x 11-9; 3.2 psi |
 42710-LBA7-90A 44710-LEC1-M00 |
F08 Rear Wheel |
The diagrams behind this sheet
Each row of the table points at the factory drawing its part sits on. Open one to see the callout number, the quantity and the gaskets and bolts around it.
E02 Cylinder Head Cover · Cylinder HeadOpen the diagram →
E04 Right Crankcase Cover · Water PumpOpen the diagram →
E05 Drive PulleyOpen the diagram →
F08 Rear WheelOpen the diagram →
F11 BatteryOpen the diagram →
F20 Harness WireOpen the diagram →
Maxxer 300 maintenance intervals
Whichever comes first, distance or time. The first service is the one riders skip and the one that matters most on a new or rebuilt engine.
| Item | Interval |
|---|---|
| Engine oil and strainer | at 150 km (90 mi), then every 1,000 km (600 mi) or 6 months |
| Transmission oil | replace every 2,000 km (1,250 mi) or 12 months |
| Drive belt | check every 2,000 km (1,250 mi) or 12 months |
| Air filters | clean every 20-40 hours of riding |
| Spark plug, valves | every 1,000 km (600 mi) or 6 months |
| Coolant | replace every 24 months |
Torque for the parts you replace
Clean, dry threads unless the row says otherwise. Aluminium cases strip long before a steel bolt complains, so use a torque wrench on the drain bolt and the plug.
| Fastener | N·m | ft-lb |
|---|---|---|
| Spark plug | 18 | 13 |
| Engine oil drain plug | 25 | 18 |
| Oil strainer screen cap | 15 | 11 |
| Transmission fill and drain bolts | 20 | 14 |
| Drive face nut | 93 | 69 |
| Wheel nuts | 44 | 33 |
| Brake caliper mounting bolts | 31 | 23 |
Electrical test values
Measured at about 20 °C with the connector unplugged. A reading far outside the range points at the part; a reading inside it sends you back to the wiring and the connectors.
| Part | Test value | Genuine part number |
|---|---|---|
| Ignition coil | primary 3.4-4.1 Ω; secondary about 14.45 kΩ without the plug cap |  3051A-KHE7-900 |
| Pulser coil | 105-110 Ω | |
| Regulator rectifier | 13.5-15.5 V; generator 150 W |  31600-LBA7-900 |
Every Maxxer 300 part, drawn on its factory diagram: KYMCO Maxxer 300 parts diagrams.
Which model year do I have?
The year decides which number is yours where a row lists more than one. Decode your VIN with the VIN lookup, or read the model code on the frame plate, then open that year's diagrams from the model list.