The "Periodic Maintenance / Lubrication Intervals" schedule is taken directly from a 1984 edition Honda NN50 Gyro 50 Factory Service Manual, which covers the '84 model (other models should be similar). Before starting any work, always consult the manual for your scooter's model & year and be sure you know what you're doing.
 

NN50 Periodic Maintenance / Lubrication Intervals

I: Inspect    R: Replace    C: Clean    L: Lubricate   A: Adjust

Item

Remarks

Type

Pre-Ride Inspection

 1 month or 200 mi (300 km) Thereafter every
12 months or 1000 mi
(1500 km)

 Thereafter every
 24 months or 2000 mi (3000 km)
Air Cleaner Element Service Manual page 3-3      Change every 6 months
Carburetor

Service Manual page 3-8

     I I I
Throttle Operation* Service Manual page 3-8  

I

   I I
Oil Pump Service Manual page 3-8       I I
Fuel Filter Screen Service Manual page 3-4       C C
Oil Line Service Manual page 3-5    

 I

  I

I
Fuel Line Service Manual page 3-4       I I
Oil & Fuel Level*   Use only 2 stroke injector oil

I

      
Decarbonize cylinder head, Cylinder, piston and muffler Service Manual pages 3-13, 6-4, 6-5         C
Transmission Oil Service Manual page 3-6 150cc SAE 10W30 motor oil   R   R
Check transmission case for leaks* Service Manual page 3-6  

I

      
Clutch Shoe Wear Service Manual page 8-10      

 

I
Tire Pressure and Condition* Service Manual page 3-13

18 psi Front, 14 psi Rear
Tires: 2.75 or 80/90 x 10

I

 

  

 
Wheel Trueness Service Manual page 3-13       I I
Brake Operation and Free Play* Service Manual page 3-9,3-10  

I

I

 I I
Brake Linings Service Manual page 3-11 Front: DP9105
Rear: DP9105, EBC301		     I I
Parking Brake Operation and Free Play Service Manual page 3-11, 3-12   I      
Steering Head Bearings Service Manual page 3-12

Lithium based grease

  

I

  

I
Suspension Operation Service Manual page 3-12      

I

I
Nuts, Bolts (tighten) Service Manual page 3-13    

I

 

I
Spark Plug*

0.6 - 0.7mm gap (0.024 - 0.028 in)

 NGK BPR6HS(BPR4HS, BPR8HS)     R R
Battery Fluid Level* Service Manual page 3-3 Distilled water
YB4L-B, CB4L-B

I

      
Battery Fluid Specific Gravity Service Manual page 15-3       I I
All Lights and Horn    

I

      

* These items are simple to perform, and may be done by the owner.  Other maintenance items should be serviced by an authorized Honda dealer, unless the owner has the proper tools, service data and mechanical knowledge to do the work.