Tune-Up
Information
General
Specs
Maintenance Intervals
Fluids
and Lubricants
General
Specs
| Item | Standard
Spark Plug (NGK) |
Plug
installation Torque |
Spark
Plug Gap |
Ignition
Timing |
Point/Air Gap |
Carburetor
Air Screw (Turns out)) |
Idle Speed | Float Level | Compression
See 5 below |
Transmission
Oil Capacity |
Tire
Pressure (Original Tires) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| H1,A ('69-'71) (Distributor CDI) |
BUHX (Surface Gap) |
18-22 ft. lbs. |
See 1 Below | .136 in. 3.45 mm 25 deg. BTDC |
016- .024 in. .4-.6mm |
1 1/4 | 1150-1250 RPM |
.94 in. 24.0 mm See 4 Below |
142 PSI | 1.7 qt. | 26 PSI (Front) 31 PSI (Rear) |
| H1B ('72) (points ignition) |
B9HCS | 18-22 ft. lbs. |
.016-.020 in. .4-.5 mm |
.088 in. 2.23 mm 20 deg. BTDC |
.012- .016 in. .3-.4mm |
1 1/2 | 1150-1250 RPM |
.94 in. 24.0 mm See 4 Below |
142 PSI | 1.3 qt. | 25 PSI (Front) 28 PSI (Rear) |
| H1C ('72) (Distributor CDI) |
B9HCS | 18-22 ft. lbs. |
See 1 Below | .136 in. 3.45 mm 25 deg. BTDC |
016- .024 in. .4-.6mm |
1 1/4 | 1150-1250 RPM |
.94 in. 24.0 mm See 4 Below |
142 PSI | 1.7 qt. | 25 PSI (Front) 28 PSI (Rear) |
| H1D,E,F ('73-'75) KH500 ('76) |
B9HS-10 | 18-22 ft. lbs. |
.035-.039 in. .9-1.0 mm |
.116 in. 2.94 mm 23 deg. BTDC |
020- .030 in. .5-.8mm |
1 1/4 | 1150-1250 RPM |
.94 in. 24.0 mm See 4 Below |
142 PSI | 1.3 qt. | 26 PSI (Front) 31 PSI (Rear) |
1 No gap for BUHX, all
others use .035-.039 in., .9-1.0 mm
3 Below edge of carburetor body, .16-.24 in., 4-6 mm
4 Below edge of carburetor body, .08-.16 in., 2-4 mm
5 within 45 PSI overall, or less than 15 PSI between cylinders
Timing Reference
500:
20 degrees..2.234mm (.088")
21..............2.458mm (.097")
22..............2.694mm (.106")
23..............2.939mm (.116")
24..............3.194mm (.126")
25..............3.459mm (.136")
26..............3.733mm (.147")
Maintenance
Intervals
Check the following
every. . .
| Day | Week | Month | 200 Miles | 2000 Miles | 4000 Miles | 8000 Miles |
| Brakes | Transmission Oil Level | Charge Battery (If In Storage) |
Lubricate Chain | Change Transmission Oil | Change Fork Oil | Replace hydraulic brake fluid |
| Lights | Cold Tire Pressure | Remove, clean, and lubricate chain | Grease wheel and steering head bearings | |||
| Horn | Spoke Tension | Lubricate cables | Check brake pads | |||
| Tires | Battery Electrolyte Level | Check oil pump adjustment | Check sprockets | |||
| Chain Tension | Chain Condition | Clean fuel petcock | Grease speedometer drive | |||
| Cable Adjustments | Critical Nuts and Bolts | Check brake fluid level (If disc brake) Adjust brakes |
Clean carburetors | |||
| Oil Tank Level | Clean and gap spark plugs | Replace Spark Plugs | ||||
| Clean points (If breaker point) |
||||||
| Check Timing | ||||||
| Clean or Replace Air Filter | ||||||
| Clean carbon off exhausts and top end |
| Gasoline | Injector Oil | Transmission Oil | Fork Oil | Chain Oil | Cables | Swingarm bushings and Steering head |
|---|---|---|---|---|---|---|
| Premium (92 octane) unleaded |
Synthetic/Semi- Syn | SAE 10W-30 | SAE 10W | Any high quality chain oil. | Light motor oil | Lithium or Moly based bearing grease |
| Standard (87-89 octane) | Mineral | SAE 10W-40 | SAE 20W | Graphite based lubricant | Chassis Grease | |
| SAE 30 (Summer) | 10W-40 for heavy damping |
Molybdenum Disulfide based Lubricant | ||||
| SAE 20 (Winter) | ||||||
| 85W90 gear oil w/o molybdenum disulphide |