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Suzuki Boulevard C90 and C90T (2013+) Maintenance Schedule and Service Intervals

2014 Suzuki Boulevard C90T BOSS black diagonal photo

This is the maintenance schedule and associated service intervals for the Suzuki Boulevard C90 and C90T from 2013 onward (though not available in all markets)

The Boulevard C90 is a cruiser motorcycle that Suzuki has made in that name since 2005. It was partly a rebranding of the former VL series of cruisers, but the new Boulevard also has multi-port fuel injection, borrowed from the GSX-R series of racing bikes. The Boulevard C90 had a revolutionary (for the time) 32-bit ECU. The original Boulevard C90 came to the end of its line in 2009.

In 2013 the Boulevard C90 was radically re-styled, and re-released as the C90 BOSS and the C90T, the same thing but with bags and a shield. In the process Suzuki made some minor changes, like to the air filter process, and to the tune.

The Boulevard C90/C90T is powered b a 1,462 cc V-twin in a 54-degree configuration that it shares with the same generation Boulevard M90. It has a chrome-over-black finish on the engine and cases to give it a typical “American-cruiser” flavour.

The engine’s fuel injection system, with dual throttle valve configuration, let the Suzuki Boulevard C90 make 50 kW (67 hp) at 4,800 rpm, and a stomping 114 Nm (84 lb-ft) at a very low 2,300 rpm.

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Suzuki Boulevard C90/C90T Maintenance Schedule

Below is the maintenance schedule for the Suzuki Boulevard C90, same as that for the C90T.

The Boulevard C90/C90T is very easy to maintain, being an exposed V-twin with a shaft drive.

Interval: This interval should be judged by number of months or odometer reading, whichever comes first.


  • I= Inspect and clean, adjust, replace or lubricate as necessary.
  • R= Replace
  • T= Tighten
  • (California model only) and (CA. only) means that the items or the maintenance interval is to be applied only for the California model.
Air cleaner element (SU-1409)Replace every 36K km (22K miles)I
Exhaust pipe bolts and muffler boltsTTT
Valve clearanceIII
Spark plugs (NGK DPR7EA-9 — you need 4 as it’s dual spark plug)IRIR
Fuel hoseIIII
Engine oil (Motul 5100 is popular)RRRRR
Engine oil filter (HF138RC)RR
Throttle cable playIIIII
PAIR (air supply) systemII
Throttle valve synchronizationI
(CA. only)
Evaporative emission control system (California model only)II
Engine coolant — Suzuki Super Long Life Coolant (Blue) Replace every 4 years or 48,000 km (29,000 miles)

(If not super long life, then every 48K km or 2 years)
Radiator hoseIIII
Final gear oil (Mobil 1 Gear Oil)RII
Clutch cable playIIII
Brake hoseReplace every 4 yearsIIII
Brake fluid (Castrol DOT 4)Replace every 2 yearsIIII
Front forksII
Rear suspensionII
Chassis bolts and nutsTTTTT
Lubrication (Lithium soap-based grease)Lubricate every 1,000 km (600 miles)

Tyre size and tyre pressure for the Suzuki Boulevard C90 & C90T

Below are the tyre recommendations for the Suzuki Boulevard C90 and C90T.

TyreSizeTyre pressure (cold)Brand(s) shipped with
Front130/80-17M/C 65H225 kPa (2.25 kgf/cm2, 33 psi)BRIDGESTONE G853 G
Rear200/60-16M/C 79HSolo: 250 kPa (2.50 kgf/cm2, 36 psi)
Dual: 280 kPa (2.80 kgf/cm2, 41 psi)
Tyres and tyre pressures for the Suzuki Boulevard C90

The front tire size is a bit larger than it was in the past — the earlier C90 (up to 2009) was on 130/70-16 tyres.

About the Suzuki Boulevard C90 and C90T (2013+)

The Suzuki Boulevard C90 was a fuel-injected cruiser that Suzuki released to replace the VL1500 in 2005. In 2013, Suzuki updated the styling significantly — though with very few changes to the actual engine.

Suzuki Boulevard C90 has a 1,462 cc 54-degree V-twin. It’s the same basic engine as in the Boulevard M90. You could also call the C90 the little sibling of the Boulevard C109, the biggest cruiser in the Suzuki Boulevard range.

Suzuki packed the Boulevard C90’s engine with all sorts of niceties. For example, the C90’s engine has chrome-nitride oil-control rings ride inside cylinders lined with the Suzuki Composite Electrochemical Material (SCEM, an acronym they use often enough to remember), a combination the factory claims to resist wear and offer a high heat-transfer rate.

The C90’s engine has a single overhead cam that operates four valves in each head and sound-deadening materials to help cut down on valve-cover drumming and general mechanical noise.

The engine breathes through same throttle bodies as the GSX-R, which opens up the opportunity for some more engine gadgetry.

Suzuki’s Dual Throttle Valve system has a secondary, computer-controlled butterfly plate that helps smooth out power deliver. Plus, it works in conjunction with the Idle Speed Control (ISC) for those cold mornings.

Finally, dual spark plugs produce a strong flame front for complete combustion, better mileage, and low emissions (and remember, you need to get four spark plugs when it’s time to replace them).

Manual for the Suzuki Boulevard C90

Suzuki Boulevard C90 Maintenance Schedule Screenshot From Manual

The above maintenance schedule comes directly from the user’s manual for the Suzuki Boulevard C90

You can download it from here.

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