KYMCO AK 550 — OEM Fluid, Tire Pressure & Maintenance Specs
550.4cc Liquid-Cooled Parallel-Twin DOHC 8-Valve (270° Crank · Dry-Sump · Wet Clutch) · Source: KYMCO AK 550 (2017–2022) Official Owner’s Manual Maintenance Specifications
According to the KYMCO AK 550 (2017–2022) Official Owner’s Manual Maintenance Specifications, the 2017–2022 KYMCO AK 550 (chassis SAA0AA/E1-A3) requires 2.2 L (2.32 US qt) of SAE 10W-40 (JASO MA2, API SN / JASO MA2 Full Synthetic) engine oil for a drain-only change and 2.5 L (2.64 US qt) with filter service (1541A-LGC6-E00 / HF160). Standard solo cold tire pressure is 225 kPa / 2.25 bar / 33 PSI front (120/70 R15 56H) and 250 kPa / 2.50 bar / 36 PSI rear (160/60 R15 67H), paired with 2× NGK CR8E spark plug(s) and a YTZ14S / YTX14-BS battery.
Drain only: 2.2 L (2.32 US qt)
R 250 kPa (2.50 bar)
Est. Range: ~312 km (194 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Multi-Plate Automatic Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-40 · JASO MA2 · API SN / JASO MA2 Full Synthetic |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 2.2 L (2.32 US qt) • With filter/strainer: 2.5 L (2.64 US qt) • Complete dry overhaul: 3.1 L (3.28 US qt) |
| OEM Oil Filter Code & Type | 1541A-LGC6-E00 / HF160 |
| Correct Oil Level Check Method | Dry-sump oil tank — warm engine to operating temperature and check oil tank/frame dipstick immediately after shutdown per OEM procedure (never top up cold) |
| Oil Drain Bolt Torque | 25 N·m (18.4 lb-ft / 2.55 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 120/70 R15 56H · Rear: 160/60 R15 67H (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 225 kPa / 2.25 bar / 33 PSI Rear: 250 kPa / 2.50 bar / 36 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 225 kPa / 2.25 bar / 33 PSI Rear: 275 kPa / 2.75 bar / 40 PSI |
| OEM Spark Plug & Quantity | NGK CR8E × 2 (Gap: 0.7–0.8 mm) |
| OEM Battery Code & Rating | YTZ14S / YTX14-BS (12V 11.2Ah MF AGM) |
| Final Drive Maintenance | Carbon/Aramid Reinforced Secondary Belt — Inspect belt deflection and pulley debris |
| Brake Fluid & Coolant | DOT 4 · OAT ethylene-glycol coolant for aluminum radiators (50:50 premix) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 550 cc · 51 hp @ 7,500 rpm · 52 N·m (38.4 lb-ft) @ 5,750 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 785 mm (30.9 in) · 226 kg (498 lbs) |
| Fuel Tank & Est. Real-World Range | 14.5 L (3.8 US gal) · ~21.5 km/L → ~312 km (194 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 5,000 km / 10,000 km • Air Filter / Spark Plug: 10,000 km / 15,000 km • Valve Clearance Check: 20,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Built on a hollow-cast aluminum perimeter frame with radial Brembo monobloc calipers, 41 mm USD forks, Noodoe smart display, and chassis-mounted twin-cylinder balance.
Oil & Clutch Mechanical Engineering Note
Because its multiplate automatic clutch runs bathed inside the dry-sump engine oil with an exposed carbon belt final drive, strictly use JASO MA2 synthetic SAE 10W-40 (2.5 L w/ HF160).
Garage Wrenching Gotchas
- Clean both oil strainer screens alongside spin-on filter HF160, and follow the warm-idle dry-sump scavenging sequence before checking the dipstick so you never overfill.
- Road grit or misaligned axle adjusters make the exposed secondary toothed belt squeak—wash the belt gently with mild soap and set exact tension deflection.
5. Frequently Asked Questions (FAQ)
What oil volume, JASO grade, and oil filter code does the KYMCO AK 550 (2017–2022) require?
Because its wet multi-plate clutch shares engine oil with the gearbox, run SAE 10W-40 (JASO MA2) at 2.2 L (2.32 US qt) drain-only and 2.5 L (2.64 US qt) with filter (1541A-LGC6-E00 / HF160).
How do you accurately check the oil level on the AK 550, and what are its service intervals?
Because this dry-sump engine scavenges oil into a separate tank while running, always measure immediately after a full warm-up; checking stone-cold after sitting misleads riders into massive overfilling. Torque the drain plug to 25 N·m with a new crush washer. Factory oil change intervals are every 5,000 km, with valve clearance inspection every 20,000 km.
What are the cold tire pressures, puncture repair type, seat height, and range of the AK 550?
Fitted with 120/70 R15 56H front and 160/60 R15 67H rear tubeless rims (compatible with roadside plug kits), set cold tire pressures to 33 / 36 PSI (225/250 kPa) solo or 33 / 40 PSI loaded. Seat height is 785 mm (30.9 in) at 226 kg wet weight, delivering ~312 km per 14.5 L tank.