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Honda Monkey Maintenance Schedule and Service Intervals

Red Honda Monkey

This is the maintenance schedule and associated service intervals for the Honda Monkey.

Originally introduced in 1961 as a children’s ride for Honda’s Tama Tech — a Honda-owned amusement park in Japan  — the Honda Monkey series of minibikes today have reached cult classic status. They’re a classic “do everything” bike. You can ride them to the shops, or you can ride them around the world (if you want an adventure, anyway).

The modern Monkey has a 125cc EFI engine, with the top of the line model being equipped with ABS for added safety (it’s standard in some markets, like in Europe).

The Monkey could be seen as the Honda Grom but in a more utilitarian, adventure-ready configuration.

Here are the other Honda MiniMoto maintenance schedules:

Honda Monkey Stock Image
Honda Monkey – Yellow

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What you need to service your Honda Monkey

Doing your own service on the Honda Monkey is part of the ownership experience. But what oil, spark plugs etc. should you use? Apart from general standard motorcycle maintenance tools, here’s what you need to service your Honda Monkey.

PartHonda Monkey Spec
OilHonda recommends SAE 10W-30 oil that’s API classification SG or higher or JASO T 903 standard MA or higher. There are a lot of oils that fit the bill, but Honda recommends Pro Honda GN4.

Note — there’s no oil filter to change on the Honda Monkey, just an oil centrifugal filter to clean out (see the schedule below)
Spark plugManual specifies NGK CPR6EA-9.
Brake fluidThe manual specifies DOT 3 or DOT 4, but recommends Honda DOT 4 brake fluid.
Air filterUse a K&N HA-1219 as an easy drop-in replacement.
Chain maintenanceService your chain regularly! Either use a Motul chain care kit, or with Motul chain paste.
GreaseUse lithium soap-based grease and silicone grease for external pivot points, like the sidestand and bearings.
Brake padsEBC FA375HH for the front and FA343HH for the rear (slightly different to the Grom).
Honda Monkey maintenance parts

Honda Monkey Maintenance Schedule

Below is the maintenance schedule for the Honda Monkey. At higher odometer readings, repeat at the frequency interval established here.

Honda’s recommended difficulty levels in service, which you may politely ignore and do everything:

  • X: Should be serviced by your Honda dealer, unless you have the proper tools and service data and are mechanically qualified. Refer to the official Honda Service Manual.
  • XX: In the interest of safety, we recommend these items be serviced only by your Honda dealer.

Maintenance Procedures:

  • I: inspect and clean, adjust, lubricate, or replace, if necessary
  • C: Clean
  • L: lubricate
  • R: replace
Itemsx 1000 mi0.64812162024
Emission-Related Itemsx 1000 km16.412.819.225.63238.4Regular
Throttle OperationXIIIIII
Air Cleaner*2RR
Crankcase Breather*3CCCCCC
Spark Plug (CPR6EA-9)IRIRIR
Valve ClearanceXIIIIII
Engine Oil (Pro Honda GN4)RRRRRRR1 Year
Engine Oil Strainer ScreenXXCCC
Engine Oil Centrifugal FilterXXCCC
Engine Idle SpeedXIIIIIII
Evaporative Emission Control System (CA only)XII
Non-Emission-Related Items
Drive Chain (Motul chain paste)Every 300 mi (500 km): I L
Brake Fluid*5 (Honda DOT 4)IIIIII2 Years
Brake Pad Wear (FA375HH for the front and FA343HH for the rear)IIIIII
Brake SystemIIIIII
Brake Light SwitchIIIIII
Headlight AimIIIIII
Clutch SystemIIIIII
Side StandIIIIII
Nuts, Bolts, FastenersXIII
Steering Head BearingsXXIII
Honda Monkey maintenance schedule


  • 2. (Air filter) Service more frequently if the motorcycle is ridden in unusually wet or dusty areas
  • 3. (Crankfase breather) Service more frequently when riding in rain or at full throttle.
  • 5. (Brake fluid and radiator coolant) Replacement requires mechanical skill.

Tyre size and tyre pressure for the Honda Monkey

The manual specifies the following tyre sizes, says the Honda Monkey ships with the following tyre brands, and specifies the following tyre pressures.

TyreSizeBrand(s)Tyre pressure
Front120/80-12 65JVEE RUBBER V13329 psi (200 kPa)
Rear130/80-12 69JVEE RUBBER V13329 psi (200 kPa)
Tyres and tyre pressures for the Honda Monkey

About the Honda Monkey

The Honda Monkey is a miniature adventure bike that is designed to do anything.

Power on the Honda Monkey comes from the horizontally mounted, air-cooled thumper that looks similar to the original plant, but like the rest of the bike, it’s a thoroughly modern item.

The 52.4 mm bore and 57.9 mm stroke adds up to a total of 125 cc with a moderate compression ratio of 9.3-to-1. A simple SOHC times the dual-valve head — hopefully with Honda’s slick little screw-and-locknut valve adjuster — and a PGM-FI system meters the induction.

Power delivery measures in with 9.25 horsepower at 7,000 rpm. While that may seem a little underwhelming, it’s important to keep in mind the 235-pound curb weight.

A steel backbone frame on the Monkey serves as the skeleton for our little simian friend, and the factory gave it the same consideration as its larger bikes with due attention given to the balance between flexion and support for what it claims is a supple ride.

It’s hard to reconcile the word “supple” with such a small ride, but there it is. The front end floats on a pair of upside down forks that deliver four inches of travel with dual, coil-over rear shocks that give up 4.09 inches of travel, measured at the axle.

Honda Monkey Specs


  • Type: Horizontal four-stroke single
  • Displacement: 125cc
  • Fueling: EFI
  • Cooling: Air
  • Valvetrain: SOHC, two valves
  • Transmission: 4-speed
  • Clutch: Multiplate wet


  • Front suspension; travel: Non-adjustable 31mm inverted fork; 3.9 inches
  • Rear suspension; travel: Non-adjustable shocks; 4.1 inches
  • Tires: Vee Rubber
  • Front tire: 120/80 x 12
  • Rear tire: 130/80 x 12
  • Front brake: 220mm disc w/ Nissin caliper
  • Rear brake: 190mm disc w/ Nissin caliper
  • ABS: Optional ($200 additional)


  • Wheelbase: 46.5 inches
  • Rake: 25 degrees
  • Trail: 3.2 inches
  • Seat height: 30.6 inches
  • Fuel capacity: 1.5 gallons
  • Curb weight: 232 pounds
  • Colors: Pearl Glittering Blue (standard); Pearl Nebula Red

Manual for the Honda Monkey

Honda Monkey Maintenance Schedule Screenshot From Manual

The above maintenance schedule comes directly from the user’s manual for the Honda Monkey

You can download it from here.

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