The "Periodic Maintenance / Lubrication Intervals" schedule is taken directly from a 1986-95 Honda 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.

Helix Periodic Maintenance / Lubrication Intervals
Item Remarks Spec Initial break-in 1
600 mi
(1000 km)
or 
1 month		 Thereafter every
4,000  mi
(6,400 km)
or 
7 months		 Thereafter every
8,000 mi
(12,800 km)
or 
6 months		 Thereafter every
12,000 mi
(19,200 km)
or 
12 months		 Thereafter every
18,000 mi
(25,600 km)
or 
24 months
Fuel lines Inspect, clean, and replace as necessary - X X X    
Oil filter screen* Clean  - X X   X  
Air filter* Replace - -        
Brake system* Adjust free play. Replace shoes if needed Front: DP104
Rear: DP9125, DP9145, EBC350		 X X X    
V-Belt* Check for cracks and wear. Replace if necessary. Replace every 10K miles. -       X  
Final drive gear oil (sub transmission oil) Replace SAE 10W40 type SE motor oil
X
     9,000 km (6,000) or 18 months  
Control and meter cable* Apply chain lube thoroughly Honda chain and  cable lube or SAE 10W30 motor oil
X
X
X
    
Brake lever pivot shaft Apply chain lube lightly Honda chain and cable lube or SAE 10W30 motor oil  
X
X
    
Brake pedal shaft Lubricate. Apply chain lube lightly. Honda chain and cable lube or SAE 10W30 motor oil  
X
X
    
Center/side stand pivots* Check operation and lubricate. Apply chain lube lightly Honda chain and cable lube or SAE 10W30 motor oil  
X
X
    
Front fork oil* Check operation and leakage
-
 
X
X
X
X
Front brake tension- bar pivots and bottom link pivots* Apply until new grease shows Lithium soap base grease
 
 
X
 
X
Front axle* Apply grease lightly Lithium soap base grease  
 
X
 
X
Steering Bearings* Check bearings assembly for looseness. Moderately repack 15,000 km (9,500 mi) Medium weight wheel bearing grease.  
X
X
  
Repack
Wheel bearings* Check bearings for smooth rotation
Tire pressure: F 24 psi, R 28 (32 max) psi
Front: 3.50 or 110/100 x 12, Rear: 4.00 x 10
  
X
X
X
X
Battery Check specific gravity and breather pipe for proper operations
YTX12-BS, CTX12-BS sealed batteries
  
X
X
X
X
Side stand switch* Check and clean or replace as necessary
-
  
X
X
X
X

* It is recommended that these items be serviced by a Honda dealer or other qualified mechanic.
 

Note:
For further odometer readings, repeat the above maintenance at the period established: Service 1: every 3,000 km (1,900 mi), Service 2: every 6,000 km (3,800 mi), and service 3: every 9,000 km (5,700 mi) intervals.

 
 

Periodic Maintenance - Emission Control System
No. Item Remarks Initial
1,000 km
(600 mi)
or
1 month		 Service 1
4,000 km
(2,500 mi)
or
7 months		 Service 2
7,000 km 
(4,400 mi)
or
13 months		 Service 3
10,000 km
(6,300 mi)
or
19 months		 13,000 km
(8,200 mi)
or
25 months
1* Valve Clearance Check and adjust valve clearance when engine is cold
X
X
X
X
X
2* Spark Plug Check condition. Adjust gap and clean. Replace at 7,000 km (4,400 mi) (or 13 months) and thereafter every 6,000 km (or 12 months)
-
X
Replace
X
Replace
3* Crankcase ventilation system Check ventilation hose for  cracks or damage. Replace if necessary
-
X
X
X
X
4* Fuel line Check fuel hose and vacuum pipe for cracks or damage. Replace is necessary
-
X
-
X
-
5* Exhaust system Check for leakage. Retighten if necessary. Replace gaskets if necessary
-
X
X
X
X
6* Idle speed Check and adjust engine idle speed. Adjust cable free play.
-
X
X
X
X
7* Evaporative emission control system** Check control system for damage. Replace if necessary
-
-
X
-
X

* It is recommended that these items be serviced by a Honda dealer or other qualified mechanic.
** California models only

Note:
For further odometer readings, repeat the above maintenance at the period established: Service 1: every 3,000 km (1,900 mi), Service 2: every 6,000 km (3,800 mi), and service 3: every 9,000 km (5,700 mi) intervals.