What parts and components should be checked and replaced during the 20000 km service?

Question

ZAMM - Verified OEM Motorcycle Technical Knowledge Base · Accepted Answer

During the **20,000 km (12,000 miles or 24 months)** periodic maintenance service for the Royal Enfield Himalayan 450, the required replacement components, lubrication points, and inspection procedures are detailed below.

## Parts & Fluids to Replace
* **Engine Oil:** Drain and refill with 2.1 L of semi-synthetic 10W40 API SN, JASO MA2.
* **Engine Oil Filter:** Replace the filter element and renew sealing O-rings.
* **Spark Plug:** Replace with a new spark plug (gap: 0.8 mm to 0.9 mm).
* **Air Filter Element:** Replace the paper air filter element and fit a new O-ring on the cover.
* **Brake Fluid:** Replace front and rear hydraulic brake fluid (DOT 4).

## Lubrication Points
* **Control Levers:** Lubricate clutch lever and front brake lever pivot points.
* **Pedals & Footrests:** Lubricate the rear brake pedal pivot, rider footrest pivots, and pillion footrest pivots.
* **Stands:** Lubricate the side stand and centre stand pivots.
* **Drive Chain:** Clean, lubricate, and adjust drive chain slack.

## Components to Check & Inspect
* **Valve Clearance:** Inspect and adjust inlet and exhaust valve clearances.
* **Ignition & Electrical:** Inspect HT lead; clean and inspect battery terminals (apply petroleum jelly); check tightness of the earth wire eyelet.
* **Hoses & Breathers:** Inspect the rubber hose from the air filter to the throttle body, the inlet manifold/adapter rubber hose, the evaporative emission hoses, and the drain vent pipe under the air filter box.
* **Cooling System:** Inspect coolant level in the expansion tank and check for leaks or hose deterioration.
* **Fuel System:** Inspect under-tank fuel pump mounting.
* **Controls & Clutch:** Inspect and adjust clutch cable and lever free play.
* **Braking System:** Inspect front and rear brake pads for wear; inspect brake hoses and banjo bolts for leaks, routing, and condition.
* **Steering & Chassis Fasteners:** Check steering head movement; verify torque/tightness of engine mounts, swingarm pivot, front and rear wheel spindles, triple tree / T-stem pinch bolts, rear subframe mounting bolts, and rear suspension linkage.
* **Wheels, Tyres & Drivetrain:** Check tyre wear patterns, spoke tightness, rim runout/faceout, and inspect the rear wheel cush rubbers for wear or play.

[!NOTE]
Always renew drained fluids, O-rings, and removed sealing gaskets with genuine Royal Enfield parts to avoid leaks and maintain warranty integrity.

What parts and components should be checked and replaced during the 20000 km service?

Parts & Fluids to Replace

Lubrication Points

Components to Check & Inspect

Information Sources