KTM 640 LC4-E ADVENTURE R (1998–2003) — Specs
Identity
Manufacturer: KTM
Model: 640 LC4-E ADVENTURE R
Category: Adventure
Type: Motorcycle
Years: 1998 → 2003
Engine
Displacement (cc): 625
Cylinders: 1
Power (hp): 50
Power (kW): 37
Torque (Nm): 56
Dimensions
Overall length: 2270 mm
Overall width: 920 mm
Overall height: 1430 mm
Wheelbase: 1545 mm
Ground clearance: 220 mm
Tank (L): 28
Tires
Front tire: 120/70 R17
Rear tire: 160/60 R17
Front pressure (bar): 1.5
Rear pressure (bar): 2
Drivetrain
Drive chain: 520 chain, 118 links
Sprockets (front / rear): 16 / 40
Ignition
Spark plug: NGK DR8EA
Plug gap: 0.7 mm
Fluids & Filters
Engine oil: 10W-50, API SF
Engine oil (with filter, L): 2.1
Oil filter: OEM oil filter
Air filter: Hiflofiltro HFA6301
Coolant (L): 1
Brake fluid: DOT 5.1
Fuel consumption
Estimated range: ~622 km on a full tank (28.0 L)
Service
Battery: OEM battery specification
Service interval (km): 6000
Service interval (months): 12
Valve check (km): 12000
Parts and consumables for this motorcycle
Data is gathered with care, but without guarantee. Always confirm critical information with your dealer or workshop.
Service notes
Service interval: every 6,000 km or 12 months, whichever comes first. Valve clearance check every 12,000 km. Valve clearance — intake cold 0.15 mm, exhaust cold 0.15 mm. Engine oil: oil grade 10W-50, API SF, 2.1 L with filter change. Spark plug: NGK DR8EA (gap 0.7 mm). Brake fluid: DOT 5.1. Coolant capacity: 1 L. Chain: 118 links, sprockets 16/40 teeth. Tire pressure: front 1.5 bar, rear 2 bar (cold). Tire size: front 120/70 R17, rear 160/60 R17. Always confirm critical values with the workshop manual or an authorised dealer.
OEM and quality aftermarket parts that fit this bike. Always confirm with your dealer before ordering.
Engine oil
Spec: 10W-50, API SF, 2.1 L (with filter)
- OEM OEM recommended engine oil
- Premium Motul 7100 4T (100% Synthetic, Ester)
- Premium Motul 5100 4T Technosynthese (Semi-Synthetic)
Which Motul for this bike?
| Motul 7100 4T ✓ | Motul 5100 4T | |
|---|---|---|
| Product | Motul 7100 4T — 100% fully synthetic | Motul 5100 4T — semi-synthetic |
| Best for | Sport, Naked, Adventure (600cc+), track | Standard, Cruiser, Scooter, daily use |
| RPM protection | Excellent — ester base, stable under load | Good — for normal riding conditions |
- Standard Repsol Moto Racing 4T (Synthetic)
- Standard Elf Moto 4 Tech (Semi-Synthetic)
Fully Synthetic vs Semi-Synthetic
| Fully Synthetic | Semi-Synthetic | |
|---|---|---|
| Base oil | 100% chemical synthesis (ester or PAO) | Mineral oil + synthetic additives |
| Heat resistance | Excellent — stable at extreme heat & RPM | Good — suitable for normal temperatures |
| Cold start | Better — reaches engine faster when cold | Good — adequate for normal climates |
| Change interval | Longer (up to 10,000 km) | Shorter (5,000–7,000 km typical) |
| Price | Higher | Lower |
Oil filter
Air filter
Spec: Hiflofiltro HFA6301
- Standard Hiflofiltro HFA6301
Spark plug
Spec: NGK DR8EA, gap 0.7 mm
- OEM NGK DR8EA
- Premium NGK DR8EAIX
- Standard NGK DR8EA
Front brake pads
Rear brake pads
Drive chain
Spec: 118 links | Sprockets 16/40 teeth / 118 links
Front tire
Spec: 120/70 R17, 1.5 bar
- OEM OEM 120/70 R17
Rear tire
Spec: 160/60 R17, 2.0 bar
- OEM OEM 160/60 R17
Battery
- Premium Yuasa YTX12-BS or YTZ10S (typical 500-750cc)
Brake fluid
Spec: DOT 5.1
- Standard TotalEnergies HBF4
Coolant
Spec: 1.00 L coolant capacity
Service interval
Spec: 6 000 km / 12 months
- OEM Engine oil + oil filter change
- OEM Air filter inspection
- OEM Spark plug check
- OEM Brake fluid replacement: every 2 years
Valve check
Spec: 12 000 km
- OEM Intake clearance: cold 0.15 mm
- OEM Exhaust clearance: cold 0.15 mm
Suspension
Spec: 50 mm telescopic fork / 500 ml SAE 5W
- OEM Fork: 50 mm telescopic fork
- OEM Fork oil grade: 500 ml SAE 5W
