Kawasaki Z650 (2017-2022) — Maintenance Specs

The Z650 brought the ER-6 platform into the modern era in 2017: a trellis frame, semi-dry sump 649 cc twin and aggressive Sugomi styling. The semi-dry sump means small oil quantities - just 1.8 L with the filter - and a compact wet clutch. The 2020 manual documented here covers the 2017-2020 ER650F-family bikes; the 2021-2022 ER650M restyle changed bodywork and added Bluetooth dash but kept the mechanicals. LED lighting, 15 L tank and ordinary NGK CR9EIA-9 plugs keep running costs low, and the 20-30 mm chain slack is adjustable with simple hand tools.

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 Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)

Fluids & capacities

Specification	Value	Source
Oil capacity (with filter)	1.8 L1.9 US qt, when filter is removed	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)
Oil capacity (without filter)	1.6 L1.7 US qt, when filter is not removed	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)
Oil type	API SG, SH, SJ, SL or SM with JASO MA, MA1 or MA2	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)
Oil viscosity	SAE 10W-40	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)
Coolant capacity	1.2 L1.3 US qt	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)
Brake fluid type (DOT)	DOT 4	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)
Fuel capacity	15 L4.0 US gal	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)

Torque specs

Specification	Value	Source
Rear axle nut	108 Nu00b7maxle nut (11.0 kgfu00b7m, 79.7 ftu00b7lb)	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)

Electrical

Specification	Value	Source
Battery	12V 8.6Ah (10HR)	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)
Headlight bulb	LED (high/low)	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)
Spark plug	NGK CR9EIA-9	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)
Spark plug gap	0.8-0.9 mm0.031-0.035 in	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)

Tires & wheels

Specification	Value	Source
Front tire size	120/70ZR17M/C (58W)	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)
Rear tire size	160/60ZR17M/C (69W)	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)
Front tire pressure (solo)	32 psi225 kPa, cold	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)
Rear tire pressure (solo)	36 psi250 kPa, cold	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033)

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 Z650 take?

1.6 L drain-only, 1.8 L with a filter change, 2.3 L total capacity.

Z650 tire pressure?

32 psi front / 36 psi rear when cold.

What oil does the Z650 use?

SAE 10W-40 4-stroke motorcycle oil with API SG-SM and JASO MA/MA1/MA2 ratings.

Z650 spark plug?

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

Sources

Value	Source	Checked
Oil capacity (with filter): 1.8 L	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Engine Oil section, p. 129)	2026-11-03
Oil capacity (without filter): 1.6 L	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Engine Oil section, p. 129)	2026-11-03
Oil type: API SG, SH, SJ, SL or SM with JASO MA, MA1 or MA2	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Specifications, p. 28)	2026-11-03
Oil viscosity: SAE 10W-40	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Specifications, p. 28; Engine Oil section, p. 127)	2026-11-03
Coolant capacity: 1.2 L	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Specifications, p. 28)	2026-11-03
Brake fluid type (DOT): DOT 4	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Specifications, p. 30)	2026-11-03
Fuel capacity: 15 L	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (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 Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Periodic Maintenance Chart)	2026-11-03
Rear axle nut: 108 Nu00b7m	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Wheel section, p. 142)	2026-11-03
Battery: 12V 8.6Ah (10HR)	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Specifications, p. 30)	2026-11-03
Headlight bulb: LED (high/low)	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Specifications, p. 30)	2026-11-03
Spark plug: NGK CR9EIA-9	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Specifications, p. 28)	2026-11-03
Spark plug gap: 0.8-0.9 mm	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Specifications, p. 28)	2026-11-03
Front tire size: 120/70ZR17M/C (58W)	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Specifications, p. 30)	2026-11-03
Rear tire size: 160/60ZR17M/C (69W)	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Specifications, p. 30)	2026-11-03
Front tire pressure (solo): 32 psi	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Tires section, p. 152)	2026-11-03
Rear tire pressure (solo): 36 psi	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Tires section, p. 152)	2026-11-03
Chain Slack: 20-30 mm	2020 Kawasaki Z650 (ER650K) Owner's Manual (Kawasaki Owners Center / KTIVS e-book, US, item 99803-0033) (p. Drive Chain section, p. 140)	2026-11-03

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