Suzuki GSX1400 (2001-2008) Maintenance Schedule

This is the maintenance schedule and service intervals for the Suzuki GSX1400, Suzuki’s big naked bike that’s reminiscent of the UJMs of the 1980s.

The Suzuki GSX1400 is a big bruiser of a four-cylinder bike. It’s based on a 1402cc air/oil-cooled fuel-injected inline four-cylinder engine with a mild 9.5:1 compression ratio.

It makes peak power of 78 kW (105 hp) at 6800 rpm, but massive torque of 126 Nm (93 ft-lb) at 5000 rpm — so peak power is limited by its ability to rev high as an air/oil-cooled engine (despite the huge oil cooling radiator up front).

Despite the similarity in engine size, the GSX1400’s engine is not related to that of the Gen 1 Hayabusa of its time (which had a liquid-cooled engine).

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Suzuki GSX1400 Service Intervals

Overall, the Suzuki GSX1400 has 4000 mile / 6000 km service intervals. At every service, change the oil, and do a host of other checks for leaks, smooth operation, and correct lubrication.

Suzuki recommends more checks (including changing the spark plugs) every two services, and the major valve inspection check every 15000 mi / 24000 km.

Since the GSX1400 has an air/oil-cooled engine, there’s no coolant to change. However, it does have a hydraulic clutch, so change the clutch fluid along with the brake fluid.

Maintenance schedule for the Suzuki GSX1400

Below is the maintenance schedule for the Suzuki GSX1400.


  • Break-in maintenance is omitted (haven’t you broken it in yet?)
  • The schedule says you should do many things on 6-monthly intervals — use your judgment (more recent manuals only specify fluids and rubber parts should be replaced every few years, but you don’t have to check most things on a time basis if it hasn’t been ridden)

Despite being an air/oil-cooled engine, valve services in the Suzuki GSX1400 are pretty widely spaced — every 24000 km (15000 mi). Of course if you hear a noisy valvetrain, use your judgement about getting it serviced earlier.


  • I = Inspect and adjust, clean, lubricate, or replace as necessary
  • R = Replace
  • T = Tighten (re-torque)
km x 10006121824
miles x 1000481115
Engine oil — Replace (Motul 5100 10W-40)RRRRYear
Engine oil filter — replaceR
Air cleaner element — Inspect / ReplaceIIRI
Spark Plugs — Inspect / Replace (NGK CR8EK)IRIR
Valve clearance — Inspect / AdjustI
Fuel line — InspectIIIIReplace every 4 years
Idle speed — AdjustIIII
Throttle valve synchronization — AdjustII
PAIR (air supply) system _ InspectII
Throttle cable play — Inspect / AdjustIIII
Clutch hose — InspectIIIIReplace every 4 years
Clutch fluid — InspectIIIIReplace every 2 years (Castrol DOT 4)
Drive Chain — Clean / LubricateIIIIClean/ lubricate every 1000 km (600 mi). (Motul chain care kit)
Brakes — InspectIIII
Brake hoses — InspectIIIIReplace every 4 years
Brake fluid — InspectIIIIReplace every 2 years (Castrol DOT 4)
Tires — Check for damage and pressure levelsIIII
Steering — Inspect for smooth operationII
Front forks — Inspect for leaks, smooth operationII
Rear suspension — Inspect for leaks, smooth operationII
Exhaust pipe bolts and muffler bolts — TightenTT
Chassis bolts and nuts — TightenTTTT
Suzuki GSX1400 maintenance schedule

About the Suzuki GSX1400

Suzuki GSX1400 Studio RHS 3-4 blue
Suzuki GSX1400

The GSX1400 is an iconic classic — one of a now-extinct breed of air/oil-cooled inline four cylinder bikes, tuned for mid-range torque rather than anything else.

Suzuki built the GSX1400 as an answer to what it perceived as dwindling demand for the “ultimate sport bike”, despite having released their own Hayabusa to the public just a couple of years earlier.

But the GSX1400 is a very different bike to a liquid-cooled hypersports bike. For one thing, it has an air/oil-cooled engine — that massive radiator up front is for the oil!

The engine is actually based on the Suzuki GSX1100 engine from the 1980s, but with bigger bore and stroke and fuel injection. It was quite a modern design, with 16 valves and dual overhead cams even back then.

The GSX1400 is quite well equipped for a generally low-tech bike. The front brakes are sportbike-spec six-piston calipers biting 320mm discs, and the suspension is fully adjustable on both ends. Up front there are beefy 46mm forks (right way up) and at the back there are dual shocks with piggyback reservoirs.

Despite the bike’s considerable weight (around 250 kg or 550 lb fully fuelled), the Suzuki GSX1400 never feels “slow”. You feel the weight at a standstill, but because of the handlebar setup, it’s not hard to move around in slow situations.

The handling is good considering its weight and the fact that it’s not meant to be a high-speed, knee-down cornering machine.

What’s maybe very important about the Suzuki GSX1400 is that it was gorgeous at launch, and decades later it still looks breath-taking.

Yamaha had been making the similar XJR1300 both before and after the GSX.

Manual for the GSX1400

The above maintenance schedule came from the service manual for the GSX1400.

Suzuki GSX1400 maintenance schedule screenshot

You can download Suzuki manuals from here. The GSX1400 manual is no longer available, but you can find it on forums and fan sites.

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