S&S Cycle 49-State EPA Certified Engine User Manual

Page 3

OPERATION

Engine Speed and Load

Exceeding 6,250 RPM under any circumstances may damage the engine.

An engine that is run long distances at high speed or under heavy load may overheat. Oil and spark plugs should be inspected more frequently
when the engine is subjected to extreme temperatures.

Idle Speed

Do not idle engine more than five minutes with motorcycle stationary. Overheating may result.

Normal warm idle speed is 1,050 RPM. When the enrichment device lever is pulled up with a cold engine, the idle will be higher.

Oil Pressure
Engine oil pressure varies from 5 psi (.34 bar) at idle to 12-15 psi (.83-1 bar) at 50 mph (80 km/h) when the engine is at normal operating
temperature.

Altitude
The engine should operate correctly between sea level and 3,000 feet without further adjustment. For operation above 3,000 feet see your authorized
S&S dealer for proper carburetor adjustments.

Engine Break-In
During the first 500 miles of operation, critical parts are “breaking-in” against each other. For this reason:
1- Avoid excessive heat build-up. Do not allow engine to idle for long periods of time.
2- Keep the outside of the engine clean.
3- Do not subject engine to unusual stress or load as with sidecar or trailer.
4- Avoid hard acceleration until the engine is warmed up.
5- Do not lug the engine. Vary the engine speed; avoid maintaining a steady speed for long distances.

First 50 Miles (80 Kilometers) –
1- Without lugging the motor, do not exceed 50 mph (80 km/h).
2- Keep the engine speed below 2,500 RPM.
3- Change the oil and filter at 50 miles (80 kilometers).

Up to 500 Miles ( 800 Kilometers) –
1- Do not exceed 65 mph (105 km/h).
2- Keep the engine speed below 3,000 RPM.
3- Change the oil and filter at 500 miles (800 kilometers).

Up to 2,500 Miles (4000 Kilometers) –
1- Keep the engine speed below 3,500 RPM.

For motorcycles not equipped with tachometers, the following table may be used as a guide for estimating the engine RPM in each gear based on
the road speed.

Road Speed At 2,000 & 3,000 RPM In Each Gear Based On Stock Late-Model Harley-Davidson® FL and FX Overall Gear Ratios and Rear Tire Size

Gear

Road Speed at 2,000 RPM

Road Speed at 3,000 RPM

1st

15 mph (24 km/h)

22 mph (35 km/h)

2nd

22 mph (35 km/h)

32 mph (52 km/h)

3rd

30 mph (48 km/h)

44 mph (71 km/h)

4th

39 mph (63 km/h)

58 mph (93 km/h)

5th

47 mph (75 km/h)

71 mph (114 km/h)

CAUTION