Honda CB1000 “Project Big-1” Maintenance Schedule

This is the maintenance schedule of the Honda CB1000 Super Four, also known as “Project Big-1”. This is from the owner’s manual, verified from the service manual. And some additional useful bits of information from the service manual are included.

The CB1000 Super Four is based on a 998 cc liquid-cooled inline four-cylinder engine, originally mounted in the Honda CBR1000F, but detuned for a naked sport bike.

In the CB1000SF, the engine makes 98 hp / 71 kW at 8500 rpm, with peak torque of 84 Nm / 62 lb-ft coming on at 6000 rpm. The engine has four Keihin carburettors, and puts power down via a 5-speed transmission and chain drive.

The CB1000 Super Four was eventually replaced by the Honda CB1300 (fuel-injected).

Honda CB1000 Super Four Project Big-1 RHS 3-4 studio
Honda CB1000 Super Four Project Big-1

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About the Honda CB1000 Super Four

Honda CB1000 Super Four RHS 3-4 static outdoor red brick wall
Honda CB1000 Super Four

The Honda CB1000 Super Four was a transitional “standard” Honda motorcycle.

It took the engine of the Honda CBR1000F “Hurricane”, which made 130 hp in base trip, and lopped off around 1/4 of that peak in favour of a milder, midrange-focused tune.

But Honda also took around 14 kg / 30 lb of weight off the Honda CBR1000F, from removing all the fairing and mounting hardware.

The Honda CB1000 Super Four is a basic bike. The suspension is non-adjustable at the front, and the shocks are adjustable only for preload.

But it has all the essentials for a basic motorcycle ride. Conventional forks. Twin four-piston calipers on large discs. Five-speed transmission. Everything you need for a basic everyday ride.

General ride quality on the Honda CB1000 is excellent. It has smooth power all through the rev range, though there’s a little buzz around 5,000-5,500 rpm.

Handling is great. Though it’s a heavy bike, it’s easy at any speed, whether walking pace or powering out of curves. There’s loads of steering lock, and the high centre of gravity is intentional, to make the bike easier to tip.

Unfortunately, Americans only got the Honda CB1000 for a couple of years, and it didn’t sell too well in that period.

The Honda CB1000 was eventually replaced by the first-gen carburettor-fed CB1300 (which the Americans didn’t get, either). While that’s an excellent bike, it’s also a step up in complexity. For one thing, the change in style of engine design means that to adjust the CB1300’s valves, you have to remove the camshafts. That distinctly increases the complexity of the job. (Of course, you do it less often. So, pros and cons.)

See more information about the design process at Honda’s site here.

Core specs of the Honda CB1000 Super Four / Project Big-1

These are from official sources, including press releases and the owner’s manual.

EngineDOHC liquid-cooled inline four, four valves per cylinder
Capacity998 cc
Bore / stroke (mm)77 x 53.6
Compression ratio10.0:1vs CBR1000F 10.5:1
Induciton4 x 34 mm Keihin carburettors
Peak power72 kW / 98 hp @ 8500 rpmvs CBR1000F’s 125 hp
Peak torque84 Nm / 62 lb-ft @ 6000 rpm
Final driveChain, 5-speed
Front suspensionConventional 43mm forks, non-adjustableFrom RC30
Rear suspensionDual shocks, preload adjustableSame internal build as CBR900RR / CBR600F2
Front brakes2 x 310mm discs, 4-piston calipers
Tank capacity22 L / 5.8 US gal
Dry weight235 kg / 518 lb
Curb weight (49 state)260 kg / 573 lb
Honda CB1000 Super Four / Project Big-1 specs

Service Intervals for the Honda CB1000 Super Four “Project Big-1”

Overall, the maintenance intervals for the CB1000 reflects many early big fours:

  • Every 4000 miles / 6000 km, do an inspection of safety elements, and the spark plugs.
  • Every 8000 miles / 12000 km, do an oil change and valve clearance inspection, plus go over the motorcycle, looking at the inspection checklist.

Change the oil every year, regardless of mileage. This is common modern advice.

Some other items, e.g. changing coolant or changing brake / clutch fluid, should be done periodically instead.

While the valve clearances do need to be serviced quite often, access is fairly easy and they’re of a screw and locknut type, so the job isn’t a big one — you don’t have to remove the camshafts.

Maintenance Schedule

Below is the maintenance schedule for the Honda CB1000 Super Four “Project Big-1”.

Rather than as one block, it’s organised into two sections — a major items maintenance schedule, and the standard inspection checklist.

km x 100061218243036
mi x 10004812162024Every
Standard inspection checklist (see below) — Perform
Engine oil — Change
Manual recommends 10W-40 with SE, SF, or SG+ rating, e.g. Mobil 1 10W-40
Tighten plug to 30 Nm / 22 lb-ft
Oil filter — Change (HF303RC)
Tighten to 10 Nm / 7 lb-ft
Spark plugs — Inspect
Gap: 0.8-0.9mm
Spark plugs — Change (NGK DPR9EA-9)
Air filter — Change (HFA1914)
Engine idle speed — Inspect / adjust
1000 rpm +/- 100 rpm
Valve clearances — Inspect / adjust
Brake and Clutch fluid — Inspect level
Brake and Clutch fluid — Change (Castrol DOT 4)2 years
Brake pads wear — Inspect
Coolant — Change3 years
Honda CB1000 major items maintenance schedule

Standard service checklist

Do the following checks on your Honda CB1000 as part of every scheduled inspection.

Honda CB1000 Project Big-1 Inspection Checklist
Fuel Lines — Check condition, correct routing, and for no cracks
Throttle operation and free play – Lubricate with Protect all cable life
Target free play: 2-6 mm (0.1-0.2 in)
Carburetor choke — check operation
Cooling system — Check for no leaks, and that fans come on
Drive chain slider — Check wear level. Replace as necessary
Clutch system — Check for correct function, and clutch free play
Brake system — Check for proper function
Brake light switch — Check lights come on
Wheels/Tires — Check for dents, tire condition, tread depth
Suspension — Check for smooth operation, no leaks
Headlight aim — Check, re-adjust after adjusting suspension
Side stand / Centre stand — Check for smooth function, lubrication condition
Steering head bearings — Check for smooth operation
Nuts, bolts, fasteners — Check for presence. Replace / retighten as needed
Secondary air supply system — Check
Crankcase breather — Check, clean as needed
Honda CB1000 Project Big-1 Inspection Checklist

Maintaining the Chain on the Honda CB1000 Super Four

It’s important to maintain your chain on the CB1000, as on any chain-driven motorcycle, but particularly a big torquey standard that you’re likely to use in a variety of situations.

Use a good-quality and portable chain lubricant like Motul chain paste, or a Motul chain care kit which comes with a couple of handy tools to maintain the chain (brushes etc.).

Honda recommends you follow the following chain maintenance schedule:

Chain maintenance itemEvery
Check drive chain lubrication condition, lubricating if necessary600 mi / 1000 km
Check drive chain slack, adjusting if necessary600 mi / 1000 km
Chain maintenance schedule — Honda CB1000 Super Four


  • Do these items (checking/adjusting slack, and checking/applying lubrication) more often if you ride your CB1000 in dusty or rainy conditions.
  • Always lubricate the chain after washing the motorcycle (assuming the chain gets wet).

To check the slack on the Honda CB1000 Super Four, put the motorcycle in neutral, onto its kickstand, and on a level surface.

Check the slack on the lower part of the chain, midway between the sprockets, and check it in multiple places (move the motorcycle forwards and backwards) as chains wear unevenly.

Slack on the CB1000 is defined as the free vertical movement of the chain.

Target chain slack for the CB1000 Super Four: 25-35mm (1.0-1.4 in)

If the chain slack is out of spec, you need to adjust it.

Adjusting chain slack

To adjust the chain slack on the CB1000, follow the steps below. As with measuring chain slack, make sure that the motorcycle is on a level surface on its kickstand, in neutral, with no weight on it (no saddlebags / luggage).

  1. Loosen the rear axle and the adjuster lock nuts on either side of the axle.
  2. Turn the adjuster nuts to tighten (or loosen) the chain. Keep checking the chain tension to see if it has come within spec. (Target chain slack: 25-35 mm / 1.0-1.4 in)
  3. Keep an eye on the adjuster alignment marks on either side of the axle. Make sure that the adjustment is to the same point.
  4. When you’re done, tighten the axle to 93 Nm / 67 lb-ft.
  5. Re-check the chain slack again to make sure it’s still within spec.

If you can’t adjust the chain to within spec, and you get to the “red zone” on the label, then the chain is excessively worn and you have to replace it.

Wheels and Tyres

Below are the standard tire sizes and recommended pressures for the CB1000 Big One.

The CB1000 Super Four has odd 18-inch front and rear tires, which will limit selection options somewhat.

WheelTire sizeTire pressure (cold)
Front120/70R18 59V250 kPa / 2.5 bar / 36 psi
Rear170/60R18 73V290 kPa / 2.9 bar / 42 psi
Tire sizes and pressures Honda CB1000 Project Big-1

Standard Maintenance Torque Settings

Below are maintenance torques for the CB1000 Super Four.

Engine oil drain bolt3022
Oil filter107
Spark plug1511
Valve adjuster lock nut2317
Front wheel axle nut5943
Front wheel caliper bolts3122
Rear wheel axle nut9367
Standard maintenance torques

Reference — Screenshots from the Manual for the CB1000 Big-1

Below are screenshots from the manual for the Honda CB1000 Super Four “Project Big-1”.

You can see or download a searchable version of the CB1000’s manual below.

You can download an original from Honda’s Australia site here.

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