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Yamaha XJ600 Diversion/SECA II Maintenance Schedule

1998 Yamaha XJ600 Seca II

This is the maintenance schedule and associated service intervals for the Yamaha XJ600S SECA II, known as the Diversion in some markets..

The XJ600S Seca II a.k.a. Diversion were manufactured between 1992 and 2004, with only small changes made during the years. They’re all a carburettor-fed 8-valve inline four cylinder touring motorcycle with a bikini fairing.

There was also a Yamaha XJ600N naked version that’s otherwise identical.

Yamaha XJ600N — naked version of the XJ600

Yamaha XJ600S SECA II Maintenance Schedule

Below is the maintenance schedule for the 1998 XJ600S Yamaha SECA II

The maintenance for the 1998 XJ600S Yamaha SECA II is broken into two sections: periodic maintenance for emission control systems, and general maintenance and lubrication.

For odometer readings or time periods higher than 31,000 km (19,600 mi) or 31 months repeat the same maintenance as listed in the table from the 7,000 km (4,400 mi) or 7 months every 6,000 km (3,800 mi) or 6 month interval.

Yamaha recommends that some items be serviced by a Yamaha dealer or other qualified mechanic; use your intuition.


  • R = Replace
  • The air filter needs more frequent service if you are riding in unusually wet or dusty areas.
  • Brake fluid replacement:When disassembling the master cylinder or caliper cylinder, always replace the brake fluid. Check the brake fluid level regularly and fill as required.
  • Replace the oil seals on the inner parts of the master cylinder and caliper cylinder every two years.
  • Replace the brake hoses every four years or if cracked of damaged.

Periodic Maintenance — Emission Control System

Valve Clearance• Check and adjust valve clearance when engine is cold.
Spark Plugs• Check condition.
• Adjust gap and clean.
• Replace at 13,000 km (or 13,000 months) and thereafter every 12,000 km (or 12 months).
Crankcase breather system• Check breather hose for cracks or damage.
• Replace if necessary.
Fuel line• Check fuel hose and vacuum pipe.
• Replace if necessary.
Fuel filter• Replace initial 31,000 km (19,600 mi) and thereafter every 30,000 km (19,00 mi).R
Exhaust system• Check for leakage.
• Re-tighten if necessary.
• Replace gaskets if necessary.
Carburetor Synchronization• Adjust synchronization of carburetors.
Idle speed• Check and adjust engine idle speed.
• Adjust cable free play.
Evaporative emission control system (CA only)• Check control system for damage.
• Replace if necessary.

General Maintenance/Lubrication

Engine oil• Warm-up engine
before draining, replace with Yamalube 10W-40 or Yamalube 10W-50.
Oil filter• Replace
Air filter• Clean with compressed air.
• Replace if necessary.
Brake system• Check brake system.
• Replace pads if necessary.
Clutch• Adjust free play.
Drive chain (every 1000km/600 mi, or after getting chain wet)• Check chain condition.
• Adjust and lubricate chain thoroughly (Motul chain paste)
Control and meter cable• Apply lube thoroughly (Protect all cable life)
Rear arm pivot shaft• Apply grease lightly (silicone grease)
Brake/Clutch lever pivot shaft• Apply cable lube lightly.
Brake pedal and shift pedal shaft• Lubricate. (lithium soap-based grease)
Sidestand pivot• Check operation and lubricate (lithium soap-based grease)
Front fork• Check operation and leakage.
Steering bearings• Check bearings assembly for looseness.
• Moderately repack every 24,000 km (15,200 mi). (lithium soap-based grease)
Wheel bearings• Check bearings for smooth rotation.
Sidestand switch• Check and clean or replace if necessary.
Yamaha Seca II Maintenance

About the Yamaha XJ600 SECA II

The Yamaha XJ600 represented a small range of motorcycles.

In North America there was the Seca II, the bikini fairing touring motorcycle with a comfortable seating position.

In Europe and Australia there was also the XJ600N, the naked motorcycle with handlebars and a different fairing.

In every format, the Yamaha XJ600 motorcycles were powered by a 598cc air-cooled 8-valve inline-four engine. At its peak, it would produce around 60 hp (45 kW) — not a whole lot.

But the motorcycles are known to be efficient, easy to run, and unfussy — their 10:1 compression ratio means that regular unleaded petrol is fine. They have a range of over 300 km or 200 miles, too.

Manual for the Yamaha XJ600 SECA II

1998 Yamaha SECA II Maintenance schedule screenshot from manual

The above information was gleaned from the owner’s manual for the 1998 Yamaha SECA II.

You can download it from Yamaha’s website here.

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