CFMOTO 650NK (2017+) Maintenance Schedule and Service Intervals

This is the maintenance schedule and service intervals for the CFMOTO 650NK made from 2017 onward. CFMOTO also made the 650NK from 2012-2016, but for 2017 they revised some of the ride components (including adding ABS) and exterior design.

The 650NK is in the “affordable middleweight naked” category, competing with the Yamaha MT-07 and Kawasaki Z650, but mainly on price point.

The CFMOTO 650NK is powered by a 649cc liquid-cooled parallel twin DOHC eight-valve engine with a 180-degree crank, similar to that found in the Kawasaki Z650. In the 650NK, the engine makes peak power of 52 kW (70 hp) at 8750 rpm. But it’s often sold in learner-restricted format, making 41.5kW (55hp) at 9500 rpm, with peak torque coming in at 7000 rpm at 62 Nm (45 ft-lb) on both models.

The CFMOTO 650NK 2017+ version got better brakes by J. Juan, an LCD dash, and better exterior design with help from Kiska, KTM’s design firm.

The same motor is also in CFMOTO’s middleweight adventure touring offering, the CFMOTO 650MT.

In 2021 CFMOTO has announced the 2021+ CFMOTO 650NK SP, which has the same motor but with a few enhanced features like ride modes, a slipper clutch, a TFT display, and Pirelli Angel GT tyres.

Originally published Sep 25 2021, but considerably updated.

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CFMOTO 650NK Service Intervals

The general maintenance for the CFMOTO 650NK is a minor service every 6000 km / 4000 mi, at which you change the oil and filter and do a once-over of the safety equipment (brakes, suspension, etc.).

The more major service is every 12000 km / 8000 mi, when you change the spark plugs, clean the air filter (or replace it), and do a more thorough once-over of the bike.

Valve service intervals are a separate service on the 650NK, 42000 km / 26000 mi apart.

Aside from that, replace fluids (brake fluid, coolant) and rubber parts periodically as they wear, and keep the motorcycle lubricated.

What you need to service the CFMOTO 650NK

To service the CFMOTO 650NK, apart from general motorcycle maintenance tools, you also need the following consumables.

PartCFMOTO 650NK spec
Engine oilCFMOTO recommends SAE 15W-40 motorcycle oil that meets API SG or above.
Spark plugNGK CR8EI is the standard spec
CoolantAny 50% ethylene glycol-based coolant that has corrosion and rust inhibitors and that’s aluminium safe. Honda coolant is an affordable and high-quality option.
Brake fluidUse DOT 4 brake fluid only.
Cable lubeUse engine oil or cable lubricant. Protect All Cable Life is a cheap and popular choice.
Cable maintenanceRegularly clean and maintain your cable. A Motul chain care kit is a good choice.
CFMOTO 650NK maintenance parts

Maintenance schedule for the CFMOTO 650NK

Below is the maintenance schedule for the 650NK.

This is adapted from the manual but it has been re-ordered and simplified for clarity, and combined into one table.

The general maintenance for the CFMOTO 650NK is a minor service every 6000 km and a major one every 12000 km. Aside from that, replace fluids and rubber parts periodically.

Important notes

  • Past the end of the maintenance schedule, keep following it in the order shown. Some items are infrequent, e.g. valve service or replacing some fluids.
  • The break-in maintenance is omitted, as usually dealers do this (and it’s necessary to maintain the warranty)
  • The manual recommends replacing engine oil and filter every six months even if the bike isn’t ridden. This is very aggressive and uncommon — use your own judgment.
km x 1000612182430364248
mi x 100048121620242832Every
Engine and fuelling
Engine oilRRRRRRRRReplace every 6 months
Oil filterRRRRRRRRReplace every 6 months
Spark plugRRRR
Air cleaner element – Clean or ReplaceCCCCReplace every 2 years
Air suction system – inspect for damageIIII
Throttle bodyCCCCCCCC
Valve clearances – inspectCheck every 42000 km
Throttle control system – inspect for free play, smooth returnIIIIInspect every year
Idle speedIIII
Fuel hose and pipe – inspect for fuel leaks, damage, and correct installationIIIIInspect every year
Fuel hoses – replaceRReplace every 4 years
Cooling system
Coolant (inspect level, system for leaks, or replace)IIRIReplace every 2 years
Radiator hose – inspect for damage and correct installationIIRIInspect every year, Replace every 2 years
Brake fluid level – Inspect or ReplaceIIIRIIIRInspect every 6 months
Replace every 2 years
Brake hose/pipe – inspect for leaks, hoses/pipe damage, and hose installation, replace periodicallyIIIIIIIRInspect every year
Replace every 4 years
Rubber parts of master cylinder and caliperRReplace every 4 years
Brake pad wear – inspect, replace as necessaryIIIIIIII
Brake operation(effectiveness, play, drag) – inspectIIIIIIIIInspect every year
Brake light switch operation – inspectIIIIIIII
Clutch operation – inspect play, engagement, disengagementIIII
Drive chain – inspect condition, lubricate600 km (or when it gets wet/dirty)
Drive chain slack – inspect
Drive chain slack should be 30-40mm deflection at its loosest point
1000 km
Drive chain wear – inspectIIII
Drive chain guide wear – inspectIIII
Wheels and tyres
Tyre air pressure – inspectIIIICheck every year
Wheels/tyre damage – inspectIIII
Tyre tread wear, including abnormal wear – inspectIIII
Wheel bearing damage – inspectIIII
Steering and Suspension
Front forks/rear shock absorber operation (damping and smooth stroke) – inspectIIII
Front forks / rear shock absorber oil leak – inspectIIIICheck every year
Steering play – inspectIIII
Steering stem bearings – lubricateLLLubricate every 2 years or 24000 km
Coupling assembly, RR, hub – inspectIIII
Damper, shock, RR, hubRRRR
Electrical system
Lights and switches operation – inspectIIIICheck every year
Headlight aiming – inspectIIIICheck every year
Side stand switch operation – inspectIIIICheck every year
Engine stop switch operation – inspectIIIICheck every year
General lubrication and tightening
Brake and gear shift pedals – lubricateLLLL
Chassis parts – lubricateIIIILubricate every year
Bolts and nuts tightness – inspect/adjustIIIICheck every year
Maintenance schedule for CFMOTO 650NK

More about the CFMOTO 650NK

The CFMOTO 650NK is a middleweight naked bike competing against the Japanese offerings. It’s a high-quality and well-featured bike, but nevertheless as a Chinese-made motorcycle, its primary selling point is that it’s a cheaper alternative to Japanese middleweight motorcycles.

Despite being positioned as a “cheaper” bike, the 650NK is an attractively built and well-specified bike. The engine is a capable one, having basically the same configuration as that in the venerable Kawasaki Z650 — a 649cc parallel twin with a 180-degree crankshaft, giving it a bit of bark. The engine has all the things you’d expect from a modern engine design: dual overhead cams, eight valves (four per cylinder), liquid cooling, and fuel injection.

The power that the 650NK makes is typical for its class. In full-power spec, it makes 52 kW (70 hp) at 8750 rpm, and in restricted (LAMS in Australia/NZ) format its power is modest but enough — 41.5 kW (55 hp) at 9500 rpm, which is enough to get you well over any speed limit, even though it won’t be accelerating past freeway speeds that aggressively — you have to drop a gear for quick passes.

The ride gear on the 650NK is also good — definitely not the worst, without being superbike spec. There are dual 300mm front disc brakes with two-piston calipers, and a single disc at the rear. The suspension is via 41mm telescopic forks (non-inverted, and non-adjustable), and a single rear shock that you can adjust for preload. None of this is terribly surprising, but also not disappointing, either.

The suspension is Kayaba-developed and Chinese-built, meaning it has a quality design, but is still affordable.

The 2017 model CFMOTO 650NK brings a number of improvements over the outgoing 2012-2016 model, including

  • Refreshed visual design, thanks to Kiska, KTM’s design firm — KTM and CFMOTO have been sharing a lot of technology and resources in recent years
  • Optional (or non-optional, depending on market) ABS
  • Ride modes (though reviewers say it’s hard to tell the difference)
  • An LCD dash
  • Less weight (13kg dry weight difference)
  • More function — better mirrors (vibration-free), better lights (LED), and a few more details.

Maintaining the 650NK is easy and cheap. Many parts are readily available considering the bike hasn’t changed fundamentally since 2012. Keep the chain lubricated and replace the fluids regularly, and it’ll be a long time before you get to the valve service — 42000 km is a nice and wide interval.

Wheel and tyre specs/pressures for the CFMOTO 650NK

The 650NK has tubeless tyres. The later model has Pirelli Angel GT sport touring tyres, but any sport touring or street tyres would be suitable.

WheelTyre sizeTyre pressure (cold)
Front120/70R17 M/C (58H)41 psi / 280 kPa
Rear160/60R17 M/C (69H)41 psi / 280 kPa
CFMOTO 650NK tyre sizes and pressures

Manual for the CFMOTO 650NK

The above came from the CFMOTO manual and from parts diagrams.

You can download the manual by sending an enquiry to CFMOTO.

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