Engine Torque Specifications - Polaris INDY TRAIL RMK Service Manual

Engine Torque Specifications

When tightening bolts, nuts, or screws, a torque pattern should be followed to ensure uniform equal tension is
applied to all fasteners. Proper torque application prevents fasteners from loosening or breaking in critical service.
It also minimizes wear and eliminates premature or needless repair costs. Following uniform torque application
sequence patterns ensures optimum performance from precision machined, close tolerance assemblies.
The most common units of torque in the English system are ft. lb. and in. lb. In the Metric system, torque is
commonly expressed in units of kg-m or Nm (Newton Meters). Multiply foot pounds by .1383 to obtain kg-m.
Move decimal point one place to the right to obtain Nm from kg-m.
Engine Cylinder Head
550 Fan Cooled 18-19.5 ft.lbs.
(25-27 Nm)
Twin Cylinder
EC55
SN50** 20-24 ft.lbs.
(29 - 33 Nm)
SN60-70** 18-22 ft. lbs.
SN70** (25 - 30 Nm)
SN80**
** Torque head bolts prior to torquing cylinder base nuts.. Apply Loctitet 242.
All 6mm Crankcase Bolts
All 7/16-14 Engine Mount Strap Bolts
Cylinder
Base Nuts
24-28 ft.lbs.
(33-39 Nm)
30-34 ft.lbs
(41-47 Nm)
30-34 ft.lbs
(42-47 Nm)
. . . . . 108 in. lbs. (12.4 Nm)
. . . . . 44-48 ft. lbs. (60-66.3 Nm)
ENGINES
Crankcase Crankcase
8 mm 10 mm
16.6-18 ft.lbs. N/A
(22-25 Nm)
20-24 ft.lbs.
N/A
(28 - 33 Nm)
20-24 ft.lbs. 26-30 Ft lbs
(28 - 33 Nm) (36-41 Nm)
Flywheel
60-65 ft.lbs.
(83-90 Nm)
90 ft. lbs.
(124 Nm)
90 ft. lbs.
(124 Nm)
3.1