Polaris ACE 150 EFI (2018 year). Manual - part 9

41

OPERATION

Failure to operate the vehicle properly can result in a collision, loss of control, 

accident or rollover, which may result in serious injury or death. Read and 

understand all safety warnings outlined in the safety section of this owner’s 

manual.

Vehicle Break-in Period

The break-in period for your new POLARIS vehicle is defined as the 

first ten hours of operation, or the time it takes to use the first two full 

tanks of gasoline. 
No single action on your part is as important as a proper break-in 

period. Careful treatment of a new engine and drive components will 

result in more efficient performance and longer life for these 

components. Perform the following procedures carefully.

NOTICE: Excessive heat build-up during the first three hours of operation will 

damage close-fitted engine parts and drive components. Do not 

operate at full throttle or high speeds during the first three hours of 

use.
Mixing brands or using a non-recommended oil may cause serious 

engine damage. Always use the recommended oil. Never substitute 

or mix oil brands.

WARNING

42

OPERATION

Vehicle Break-in Period

Engine and Drivetrain Break-in

1. Fill the fuel tank with gasoline. Always exercise extreme caution 

whenever handling gasoline. Never allow a child to handle 

gasoline.

2. Check the oil level. See page 65. Add the recommended oil as 

needed to maintain the oil level in the safe operating range.

3. Complete the New Operator Driving Procedures outlined on pages 

47-48. 

4. Avoid aggressive use of the brakes. See Brake System Break-in 

below.

5. Vary throttle position. Don’t idle extensively.
6. Perform regular checks on fluid levels, controls and areas outlined 

on the daily pre-ride inspection checklist. See page 43.

7. Change the engine oil at 5 hours or one month.
8. Adjust/lubricate drive chain at 5 hours or 1 month.

Brake System Break-in

Apply only moderate braking force for the first 50 stops. Aggressive 

or overly forceful braking when the brake system is new could 

damage brake pads and rotors.

CVT Break-in (Clutches/Belt)

A proper break-in of the clutches and drive belt will ensure a longer 

life and better performance. Break in the clutches and belt by 

operating at slower speeds during the break-in period as 

recommended. Avoid aggressive acceleration and high speed 

operation during the break-in period.

43

OPERATION

Pre-Ride Inspection

Failure to inspect and verify that the vehicle is in safe operating 

condition before operating increases the risk of an accident. Always 

inspect the vehicle before each use to make sure it's in safe operating 

condition.

Item

Remarks

Page

Brake system/pedal 

travel

Ensure proper operation

38

77

Brake fluid

Ensure proper level

79

Front suspension

Inspect, lubricate if necessary

64

Rear suspension

Inspect, lubricate if necessary

64

Steering

Ensure free operation

80

Tires

Inspect condition and pressure

26

82

Wheels/fasteners

Inspect, ensure fastener tightness

83

Frame nuts, bolts, 

fasteners

Inspect, ensure tightness

-

Fuel and oil

Ensure proper levels

34

65

Grass and debris

Remove grass and debris from the 

vehicle, especially on the engine 

intake and near the exhaust system

-

Throttle

Ensure proper operation

38

Indicator lights/switches

Ensure proper operation

-

Air filter

Inspect and clean or replace

76

Daytime running lights

Ensure proper operation

84

Brake light

Ensure proper operation

-

Seat Latch

Move the seat forward and rearward 

to ensure correct installation

29

Seat Belt

Check length of belt for damage, 

check latches for proper operation

31

Cab Nets

Check for wear or damage, ensure 

proper installation

33

44

OPERATION

Safe Operation Practices

1. Complete the New Operator Driving Procedures outlined on pages 

47-6.

2. Do not ride at night or when visibility is poor (rain, fog, dusk). 

Your vehicle doesn't have lights that are designed for driving in 

these conditions.

3. Never tow objects with this vehicle.
4. Engine exhaust fumes are poisonous. Never start the engine or let 

it run in an enclosed area. Never allow a child to handle gasoline.

5. Never install accessories not approved by POLARIS for use on 

this vehicle.

6. Ride this vehicle only in areas permitted by a supervising adult. 

Never operate the vehicle on pavement or on any public street, 

road or highway, including dirt and gravel roads.

7. Drive in a manner appropriate for your skills and operating 

conditions. Never operate at excessive speeds. DO NOT attempt 

to do power slides, “donuts”, jumps or other driving stunts. Keep 

both hands on the steering wheel at all times.

8. Never consume alcohol or drugs before or while operating this 

vehicle.

9. Always use the size and type of tires specified for your vehicle. 

Always maintain proper tire pressure.

10. Never operate a damaged vehicle. After any rollover or accident, 

have a qualified service dealer inspect the entire machine for 

possible damage.

11. Never operate the vehicle on a frozen body of water.
12. Do not touch hot exhaust system components. Always keep 

combustible materials away from the exhaust system.

13. Always remove the ignition key when the vehicle is not in use to 

prevent unauthorized use.