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Royal Alloy · Overhead-cam four-stroke single, wet sump, separate gearbox oil, CVT belt drive

GP 300

Library entry covers 2020-2025

21 factory 50 guideline

Published source

Royal Alloy GP300S Owner's Manual, Periodic Maintenance table p.33

Factory owner's handbook. Covers Royal Alloy GP300S owner's manual (US importer Genuine Scooter Company, undated); the manual names the GP300S.

71 items for a 2023 model, grouped by interval the way a factory chart is laid out.

How this bike is built (what the schedule is based on)
Engine cycle
Four-stroke
Engine lubrication
Wet sump (oil in crankcase)
Oil filtration
Replaceable cartridge or spin-on filter
Valve gear
Overhead cam, screw/locknut adjusters
Ignition
Electronic (CDI / transistor / ECU)
Charging
Alternator / stator with rectifier
Battery
Wet cell (flooded lead-acid, needs topping up)
Fuel system
Fuel injection
Cooling
Liquid cooled
Primary drive
Gear or chain inside engine, shares engine oil
Gearbox oil
Separate gearbox oil
Clutch control
Automatic or semi-automatic
Final drive
Belt CVT, scooter automatic
Front suspension
Telescopic fork
Rear suspension
Swingarm, single shock / cantilever
Front brake
Disc, hydraulic
Rear brake
Disc, hydraulic
Wheels
Spoked, tubed
Sidecar
No sidecar
Maintenance schedule

2023 Royal Alloy GP 300

On the road: every 200 mi

1 item
  • Check engine oil level
    Pre-ride / on the road
    Guideline

    Each fuel stop on old machines. Dry sump: check the tank hot, engine idling or just stopped, per your manual.

On the road: every 300 mi

2 items
  • Check lights, horn, brake light switches
    Pre-ride / on the road
    Guideline
  • Check tire pressures
    Pre-ride / on the road
    Guideline

On the road: every 500 mi

1 item
  • Check coolant level
    Pre-ride / on the road
    Guideline

Every 600 mi

1 item
  • Engine oil level (check)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33), key footnote *: check engine oil level every 600 mi/1,000 km. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

Every 1,000 mi or 6 months

1 item
  • Inspect tire tread, sidewalls and date codes
    Wheels and tires
    Guideline

Every 3,000 mi or 12 months

9 items
  • Check throttle cable(s) free play and return
    Fuel and air
    Guideline
  • Adjust automatic / semi-automatic clutch
    Primary and gearbox
    Guideline
  • Check steering head bearing adjustment
    Front end
    Guideline
  • Inspect fork seals, stanchions and fork boots
    Front end
    Guideline
  • Check footrests, pegs, rear brake and gear lever pivots
    Rear suspension and frame
    Guideline
  • Grease and check center / side stand and springs
    Rear suspension and frame
    Guideline
  • Check brake pads and discs
    Brakes
    Guideline
  • Check spoke tension and wheel true
    Wheels and tires
    Guideline
  • Check wheel bearings for play
    Wheels and tires
    Guideline

Every 3,700 mi

7 items
  • Braking systems (inspect)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): I at 600 mi, 3,700 mi, 7,400 mi, 11,200 mi, 14,800 mi, 18,600 mi, 22,300 mi, 26,000 mi, 29,800 mi, 33,500 mi, 37,300 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Driving belt (inspect)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): I at 3,700 mi, 11,200 mi, 18,600 mi, 26,000 mi, 33,500 mi. Also R at 7,400 mi; R at 14,800 mi; R at 22,300 mi; R at 29,800 mi; R at 37,300 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Engine oil (inspect)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): I at 3,700 mi, 11,200 mi, 18,600 mi, 26,000 mi, 33,500 mi. Also R at 600 mi; R at 7,400 mi; R at 14,800 mi; R at 22,300 mi; R at 29,800 mi; R at 37,300 mi. Starred: check engine oil level every 600 mi/1,000 km. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Plastic sliders in variator cover (inspect)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): I at 3,700 mi, 11,200 mi, 18,600 mi, 26,000 mi, 33,500 mi. Also R at 7,400 mi; R at 14,800 mi; R at 22,300 mi; R at 29,800 mi; R at 37,300 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Variator rollers (inspect)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): I at 3,700 mi, 11,200 mi, 18,600 mi, 26,000 mi, 33,500 mi. Also R at 7,400 mi; R at 14,800 mi; R at 22,300 mi; R at 29,800 mi; R at 37,300 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Air filter (clean)
    Fuel and air
    Factory

    Factory: Periodic Maintenance table (p.33): C at 3,700 mi, 7,400 mi, 11,200 mi, 14,800 mi, 18,600 mi, 22,300 mi, 26,000 mi, 29,800 mi, 33,500 mi, 37,300 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Clutch bell (clean)
    Primary and gearbox
    Factory

    Factory: Periodic Maintenance table (p.33): C at 3,700 mi, 7,400 mi, 11,200 mi, 14,800 mi, 18,600 mi, 22,300 mi, 26,000 mi, 29,800 mi, 33,500 mi, 37,300 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

Every 4,000 mi or 12 months

2 items
  • Inspect, clean and gap spark plugs
    Engine
    Guideline
  • Inspect CVT drive belt, rollers / sliders and clutch shoes
    Final drive
    Guideline

    Typical scooter interval. Your owner's manual figure governs; check belt width against the service limit.

Every 5,000 mi or 12 months

2 items
  • Change engine oil
    Engine
    Guideline

    Pre-1970 machines: many owners run non-detergent or classic-spec oil with no filter, so short intervals matter. Dry sump: drain the tank and the crankcase/sump, flush the tank and clean the feed and return screens.

  • Replace oil filter
    Engine
    Guideline

Every 6,000 mi or 12 months

7 items
  • Inspect coolant hoses and clamps
    Engine
    Guideline
  • Clean / inspect air filter
    Fuel and air
    Guideline

    Mesh or oiled foam: clean and re-oil. Paper: blow out or replace. Some very early machines have no filter at all.

  • Check charging voltage and regulator / cut-out
    Ignition and electrics
    Guideline
  • Check swingarm bushes for play
    Rear suspension and frame
    Guideline
  • Inspect rear shocks for leaks and damping
    Rear suspension and frame
    Guideline
  • Lubricate control cables and lever pivots
    Controls and cables
    Guideline
  • Lubricate speedometer / tachometer cables, check drive
    Controls and cables
    Guideline

    A dry speedo cable whips the needle and eventually kills the instrument.

Every 7,400 mi

12 items
  • Driving belt (replace)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): R at 7,400 mi, 14,800 mi, 22,300 mi, 29,800 mi, 37,300 mi. Also I at 3,700 mi; I at 11,200 mi; I at 18,600 mi; I at 26,000 mi; I at 33,500 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Engine oil (replace)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): R at 600 mi, 7,400 mi, 14,800 mi, 22,300 mi, 29,800 mi, 37,300 mi. Also I at 3,700 mi; I at 11,200 mi; I at 18,600 mi; I at 26,000 mi; I at 33,500 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Engine oil filter element (replace)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): R at 600 mi, 7,400 mi, 14,800 mi, 22,300 mi, 29,800 mi, 37,300 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Engine oil screen filter (inspect/clean)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): I/C at 600 mi, 7,400 mi, 14,800 mi, 22,300 mi, 29,800 mi, 37,300 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Gear oil (inspect)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): I at 7,400 mi, 22,300 mi, 37,300 mi. Also R at 600 mi; R at 14,800 mi; R at 29,800 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Plastic sliders in variator cover (replace)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): R at 7,400 mi, 14,800 mi, 22,300 mi, 29,800 mi, 37,300 mi. Also I at 3,700 mi; I at 11,200 mi; I at 18,600 mi; I at 26,000 mi; I at 33,500 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Safety fasteners (inspect)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): I at 600 mi, 7,400 mi, 14,800 mi, 22,300 mi, 29,800 mi, 37,300 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Torque driver pins (lubricate)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): L at 7,400 mi, 14,800 mi, 22,300 mi, 29,800 mi, 37,300 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Variator front movable half-pulley (inspect)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): I at 7,400 mi, 14,800 mi, 22,300 mi, 29,800 mi, 37,300 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Variator rollers (replace)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): R at 7,400 mi, 14,800 mi, 22,300 mi, 29,800 mi, 37,300 mi. Also I at 3,700 mi; I at 11,200 mi; I at 18,600 mi; I at 26,000 mi; I at 33,500 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Electrical system and battery (inspect)
    Ignition and electrics
    Factory

    Factory: Periodic Maintenance table (p.33): I at 600 mi, 7,400 mi, 14,800 mi, 22,300 mi, 29,800 mi, 37,300 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

  • Transmission cover air duct filter (inspect)
    Primary and gearbox
    Factory

    Factory: Periodic Maintenance table (p.33): I at 7,400 mi, 14,800 mi, 22,300 mi, 29,800 mi, 37,300 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

Every 8,000 mi or 2 years

1 item
  • Check and adjust valve clearances
    Engine
    Guideline

Every 10,000 mi or 2 years

2 items
  • Compression test (or leak-down)
    Engine
    Guideline
  • Change gearbox oil
    Primary and gearbox
    Guideline

Every 12,000 mi or 2 years

4 items
  • Replace air filter element
    Fuel and air
    Guideline
  • Synchronize throttle bodies
    Fuel and air
    Guideline
  • Clean and grease rear suspension linkage
    Rear suspension and frame
    Guideline
  • Grease swingarm pivot
    Rear suspension and frame
    Guideline

Every 12,000 mi or 3 years

1 item
  • Replace CVT drive belt
    Final drive
    Guideline

    Typical scooter interval, or sooner if the belt is cracked, glazed or below its width limit.

Every 14,800 mi

1 item
  • Gear oil (replace)
    Engine
    Factory

    Factory: Periodic Maintenance table (p.33): R at 600 mi, 14,800 mi, 29,800 mi. Also I at 7,400 mi; I at 22,300 mi; I at 37,300 mi. Replaced at 600, 14,800 and 29,800 mi. Abbreviation key: I = inspect and clean, adjust, lubricate or replace if necessary; C = clean; R = replace; A = adjust; L = lubricate. Key footnotes ** (replace every 2 years) and *** (replace every 4 years) are printed in the key but not attached to any row on this page.

Every 15,000 mi or 3 years

1 item
  • Change fork oil
    Front end
    Guideline

    Some early telescopic forks are grease filled or use very small oil quantities. Check your manual.

Every 16,000 mi or 4 years

1 item
  • Replace spark plugs
    Engine
    Guideline

Every 20,000 mi or 4 years

2 items
  • Repack / replace steering head bearings
    Front end
    Guideline

    Many old machines use loose balls in cups and cones. Taper roller conversions are common.

  • Repack / replace wheel bearings
    Wheels and tires
    Guideline

    Cup-and-cone and taper roller hubs need periodic repacking and adjustment.

Every 24,000 mi or 4 years

1 item
  • Replace fuel filter
    Fuel and air
    Guideline

Every 25,000 mi or 6 years

1 item
  • Replace swingarm bushes / bearings
    Rear suspension and frame
    Guideline

Every 30,000 mi or 6 years

1 item
  • Rebuild forks: seals, bushes, springs
    Front end
    Guideline

Every 6 months

1 item
  • Clean battery terminals, check charge and strap
    Ignition and electrics
    Guideline

Every 2 years

4 items
  • Replace coolant
    Engine
    Guideline
  • Inspect wiring, bullet connectors and ground points
    Ignition and electrics
    Guideline
  • Inspect frame, welds and lugs for cracks
    Rear suspension and frame
    Guideline
  • Replace brake fluid
    Brakes
    Guideline

Every 4 years

3 items
  • Replace fuel lines
    Fuel and air
    Guideline

    Old rubber and modern ethanol fuel do not mix well.

  • Inspect brake hoses; replace old rubber
    Brakes
    Guideline
  • Rebuild calipers and master cylinders (seals)
    Brakes
    Guideline

Every 6 years

2 items
  • Replace inner tubes and rim tape with tires
    Wheels and tires
    Guideline
  • Replace tires on age (regardless of tread)
    Wheels and tires
    Guideline

Guideline lines: Intervals here are general guidelines for the machine's era and layout, compiled for this app. They are not factory manual figures. Check your workshop manual, and edit any interval in the bike's Schedule tab.

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