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

GP 125

Library entry covers 2020-2025

24 factory 32 guideline

Published source

Royal Alloy Grand Prix 125 Operation Manual, Maintenance Schedule printed p.31 (viewer p.32)

Factory owner's handbook. Covers Royal Alloy Grand Prix 125 Operation Manual (ManualsLib 3938571; its page images are shared with the Grand Prix 200 manual), no year printed; chart has coolant and radiator rows (liquid-cooled); LC versus AC variant not confirmed.

56 items for a 2025 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
Air / oil 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
Cast / alloy, tubeless
Sidecar
No sidecar
Maintenance schedule

2025 Royal Alloy GP 125

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

Every 1,864 mi or 6 months

16 items
  • All fasteners (I)
    Engine
    Factory

    Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I in every column

  • Change engine oil
    Engine
    Factory

    Manual: Engine oil (replace). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): R in every column

  • Check and adjust valve clearances
    Engine
    Factory

    Manual: Valve clearance (I). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I in every column

  • Clean oil strainers / mesh screens
    Engine
    Factory

    Manual: Engine oil filter/strainer (clean). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): C in every column

  • Engine oil pump (I)
    Engine
    Factory

    Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I in every column

  • Inspect coolant hoses and clamps
    Engine
    Factory

    Manual: Radiator (inspect/clean). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I/C in every column

  • Check throttle cable(s) free play and return
    Fuel and air
    Factory

    Manual: Lubrication of cables (I). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I in every column

  • Clean / inspect air filter
    Fuel and air
    Factory

    Manual: Air filter (clean). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): C at 500, 3000, 9000, 15000, 21000 and 30000 km

  • Clean battery terminals, check charge and strap
    Ignition and electrics
    Factory

    Manual: Electrical system and battery (I). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I in every column

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

    Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I in every column

  • Transmission oil (replace)
    Primary and gearbox
    Factory

    Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): R in every column

  • Inspect drive belt, pulleys and tension
    Final drive
    Factory

    Manual: Drive belt (inspect). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I at 500 and 3000 km, R at 6000, 12000, 18000 and 24000 km, I in the columns between

  • Check steering head bearing adjustment
    Front end
    Factory

    Manual: Steering/handlebars (I). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I in every column

  • Inspect rear shocks for leaks and damping
    Rear suspension and frame
    Factory

    Manual: Suspension (I). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I in every column

  • Check brake pads and discs
    Brakes
    Factory

    Manual: Braking systems (I). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I in every column

  • Inspect tire tread, sidewalls and date codes
    Wheels and tires
    Factory

    Manual: Wheels/tires (I). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I in every column

Every 3,000 mi or 12 months

5 items
  • Adjust automatic / semi-automatic clutch
    Primary and gearbox
    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 wheel bearings for play
    Wheels and tires
    Guideline

Every 3,728 mi or 12 months

5 items
  • Plastic sliders in variator cover (replace)
    Engine
    Factory

    Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I at 500 and 3000 km, R at 6000, 12000, 18000 and 24000 km, I in the columns between

  • Replace spark plugs
    Engine
    Factory

    Manual: Spark plug (replace). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I at 500 and 3000 km, R at 6000, 12000, 18000 and 24000 km, I in the columns between

  • Variator rollers (replace)
    Engine
    Factory

    Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I at 500 and 3000 km, R at 6000, 12000, 18000 and 24000 km, I in the columns between

  • Replace air filter element
    Fuel and air
    Factory

    Manual: Air filter (replace). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): R at 6000, 12000, 18000 and 24000 km

  • Replace drive belt (wear or damage based)
    Final drive
    Factory

    Manual: Drive belt (replace). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): I at 500 and 3000 km, R at 6000, 12000, 18000 and 24000 km, I in the columns between

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

1 item
  • Replace oil filter
    Engine
    Guideline

Every 6,000 mi or 12 months

4 items
  • Check charging voltage and regulator / cut-out
    Ignition and electrics
    Guideline
  • Check swingarm bushes for play
    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 7,456 mi or 2 years

3 items
  • Replace coolant
    Engine
    Factory

    Manual: Coolant (replace). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): R at 9000 km or 24 months and 21000 km or 48 months; I in the other columns

  • Replace fuel lines
    Fuel and air
    Factory

    Manual: Fuel hoses (replace). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): R at 9000 km or 24 months and 21000 km or 48 months; I in the other columns

  • Replace brake fluid
    Brakes
    Factory

    Manual: Brake fluid (replace). Factory: Maintenance schedule p.31 (columns 500 km or 6 months, 3000 km or 12 months, then 3000 km or 6 month steps to 24000 km or 54 months, and 30000 km or 60 months; I = inspect, clean, adjust, lubricate or replace if necessary; C = clean; R = replace): R at 9000 km or 24 months and 21000 km or 48 months; I in the other columns

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

3 items
  • 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 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 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 2 years

2 items
  • Inspect wiring, bullet connectors and ground points
    Ignition and electrics
    Guideline
  • Inspect frame, welds and lugs for cracks
    Rear suspension and frame
    Guideline

Every 4 years

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

Every 6 years

1 item
  • 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.

Keep up with this schedule on your phone

Add the bike in the app and this chart loads itself, ready to log against and edit.

Coming soon to Google Play

Other 2025 Royal Alloy models

All 2025 Royal Alloy
2020-2025
GP 300
Factory
2020-2025
GT 125
Factory
2021-2025
TG 125
Guideline