Kawasaki Ninja 650 (2017-2022) — Maintenance Specs

The 2017 Ninja 650 adopted the Z650's trellis frame and 649 cc twin, dropping 20 kg versus the old EX650 and gaining a horizontal-shock rear. The 2020 EX650N documented here added LED lighting; 2021-2022 EX650P bikes got the new bodywork and TFT with the same mechanical package. Maintenance is identical to the Z650 - 1.8 L of oil with the filter, CR9EIA-9 plugs, 20-30 mm chain slack - making it one of the cheapest middleweight sportbikes to run. The 15 L tank and 32/36 psi tire pressures suit its all-road sport-touring brief.

Quick specs

Oil capacity (with filter) 1.8 L1.9 US qt, when filter is removed

Oil capacity (without filter) 1.6 L1.7 US qt, when filter is not removed

Oil type API SG, SH, SJ, SL or SM with JASO MA, MA1 or MA2

Oil viscosity SAE 10W-40

Front tire pressure (solo) 32 psi225 kPa, cold

Rear tire pressure (solo) 36 psi250 kPa, cold

Spark plug NGK CR9EIA-9

Spark plug gap 0.8-0.9 mm0.031-0.035 in

Maintenance schedule

Specification	Value	Source
Engine oil & filter	first 1,000 km (600 mi), then every 12,000 km (7,600 mi) or 1 year	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)

Fluids & capacities

Specification	Value	Source
Oil capacity (with filter)	1.8 L1.9 US qt, when filter is removed	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)
Oil capacity (without filter)	1.6 L1.7 US qt, when filter is not removed	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)
Oil type	API SG, SH, SJ, SL or SM with JASO MA, MA1 or MA2	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)
Oil viscosity	SAE 10W-40	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)
Coolant capacity	1.2 L1.3 US qt	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)
Brake fluid type (DOT)	DOT 4	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)
Fuel capacity	15 L4.0 US gal	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)

Torque specs

Specification	Value	Source
Rear axle nut	108 Nu00b7maxle nut (11.0 kgfu00b7m, 79.7 ftu00b7lb)	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)

Electrical

Specification	Value	Source
Battery	12V 8.6Ah (10HR)	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)
Headlight bulb	LED (high/low)	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)
Spark plug	NGK CR9EIA-9	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)
Spark plug gap	0.8-0.9 mm0.031-0.035 in	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)

Tires & wheels

Specification	Value	Source
Front tire size	120/70ZR17M/C (58W)	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)
Rear tire size	160/60ZR17M/C (69W)	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)
Front tire pressure (solo)	32 psi225 kPa, cold	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)
Rear tire pressure (solo)	36 psi250 kPa, cold	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121)

Official manual

Owner's manual on Kawasaki official site

Opens the manufacturer’s official website in a new tab.

Frequently asked questions

How much oil does a Kawasaki Ninja 650 take?

1.6 L drain-only, 1.8 L with the filter, 2.3 L total.

Ninja 650 tire pressure?

32 psi front / 36 psi rear, cold.

Ninja 650 spark plug?

NGK CR9EIA-9 iridium, 0.8-0.9 mm gap.

Ninja 650 vs Z650 maintenance?

Identical: same engine, oil quantities, plugs, chain slack and intervals; only bodywork and riding position differ.

Sources

Value	Source	Checked
Oil capacity (with filter): 1.8 L	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Engine Oil section, p. 131)	2026-11-03
Oil capacity (without filter): 1.6 L	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Engine Oil section, p. 131)	2026-11-03
Oil type: API SG, SH, SJ, SL or SM with JASO MA, MA1 or MA2	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Specifications, p. 28)	2026-11-03
Oil viscosity: SAE 10W-40	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Specifications, p. 28; Engine Oil section, p. 129)	2026-11-03
Coolant capacity: 1.2 L	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Specifications, p. 28)	2026-11-03
Brake fluid type (DOT): DOT 4	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Specifications, p. 30)	2026-11-03
Fuel capacity: 15 L	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Specifications, p. 30)	2026-11-03
Engine oil & filter: first 1,000 km (600 mi), then every 12,000 km (7,600 mi) or 1 year	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Periodic Maintenance Chart)	2026-11-03
Rear axle nut: 108 Nu00b7m	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Wheel section, p. 144)	2026-11-03
Battery: 12V 8.6Ah (10HR)	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Specifications, p. 30)	2026-11-03
Headlight bulb: LED (high/low)	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Specifications, p. 30)	2026-11-03
Spark plug: NGK CR9EIA-9	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Specifications, p. 28)	2026-11-03
Spark plug gap: 0.8-0.9 mm	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Specifications, p. 28)	2026-11-03
Front tire size: 120/70ZR17M/C (58W)	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Specifications, p. 30)	2026-11-03
Rear tire size: 160/60ZR17M/C (69W)	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Specifications, p. 30)	2026-11-03
Front tire pressure (solo): 32 psi	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Tires section, p. 154)	2026-11-03
Rear tire pressure (solo): 36 psi	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Tires section, p. 154)	2026-11-03
Chain Slack: 20-30 mm	2020 Kawasaki Ninja 650 (EX650N) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0121) (p. Drive Chain section, p. 141)	2026-11-03

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