The "Periodic Maintenance / Lubrication Intervals" schedule is taken directly from the 1985 edition Honda NH80 Factory Service Manual. Before starting any work, always consult the manual for your scooter's model & year and be sure you know what you're doing.

NH80 Periodic Maintenance / Lubrication Intervals

 R: Replace    C: Clean    L: Lubricate   I: Inspect, adjust if necessary

Item

Remarks

Spec

 600 mi (1000 km) 2,500 mi
(4,000 km)		 5,000 mi (8,000 km) 7,500 mi (12,000 km)
Fuel lines* Located under the LH frame cover     I I I
Fuel filter* Located inside the fuel petcock         R
Throttle operation* Check for smooth operation, adjust freeplay     I I I
Air cleaner Service more frequently in wet or dusty areas Clean in solvent, then lube with SAE10W-40 oil   C C C
Spark plug 0.024 - 0.028" (0.6 - 0.7mm) gap NGK BPR6HSA, BPR4HSA (colder plug), BPR4HSA (hotter plug)   R R R
Oil pump* Inspect connections and cable adjustment   I I I I
Engine oil lines Check for damage or deterioration     I I I
Engine oil strainer* Clean with compressed air       C  
Muffler decarbonization* Mounting bolt torque 23 - 28 ft-lbs         C
Carburetor idle speed* Adjust the throttle stop screw 1800 rpm +/- 100 rpm I I I I
Transmission oil* drain bold torque 7 - 10 ft-lb 90cc (3.0 oz) SAE 10W30 motor oil Replace every two years
Brake shoe wear Replace when the arrow aligns with the wear mark Front: DP9100, EBC303
Rear: DP9126, EBC333		   I I I
Brake system Adjust the adjusting nuts at the brake arms Free play is 10 - 20mm (3/8" - 3/4") I

 I I I
Parking brake* Adjust as necessary, after brake adjustments   I

 I I I
Brake light switch* Check for proper operation Replace as needed I I I I
Headlight aim* Check for proper aim lefthand screw - vertical
righthand screw - horizontal		 I I I I
Suspension* Check for damage and smooth operation   I I I

 I
Nuts, bolts, fasteners* Tighten as necessary Use torque chart in service manual I

 I I I
Clutch shoe wear* Check wear, inspect springs Service limit is 2.0 mm   I

 I I
Wheels* Check for wear and damage Front 21 psi, Rear 24 (32 psi max)
Tires: 3.50 x 10		 I I I

 I
Steering head bearings* Check for free, non-binding movement Lithium based grease

 I

     I

* These 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.

Battery type: YB5L-B, CB5L-B

Wiring diagram

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