Harley-Davidson Softail Slim

Maintenance specs for 1 variant of the Harley-Davidson Softail Slim — from 2018 to 2026.

2018–2026 Harley-Davidson Softail Slim

Milwaukee-Eight 114 (1868cc) Air/Oil-Cooled V-Twin (Milwaukee-Eight 114) · Belt

93 hp / 117 lb-ft

Weight20W-50

Capacity5.2 qt

Type6-Speed Cruise Drive

FluidHarley-Davidson Transmission Lube

Drain & fill0.875 qt

Full capacity1 qt

TypeDOT 4

Tank5 gal

TypePremium 91

Front130/90B16

Rear150/80B16

Pressure (front)36 PSI

Pressure (rear)40 PSI

Group sizeYTX20L-BS

Gap0.038 in

Oil change5,000 mi

Trans service10,000 mi

Brake fluid24,000 mi

Spark plugs30,000 mi

Timingchain (no scheduled replacement)

Air filter15,000 mi

Drive belt100,000 mi