Triumph T120 Owner's Manual page 131

Fluids and Lubricants
Engine Oil
Brake Fluid
Coolant
Bearings and Pivots
Drive Chain
All Models
Semi or fully synthetic 10W/40 or 10W/50 motorcycle
engine oil which meets specification API SH (or
higher) and JASO MA, such as Castrol Power 1 Racing
4T 10W-40 (fully synthetic) engine oil, sold as Castrol
Power RS Racing 4T 10W-40 (fully synthetic) in some
countries.
DOT 4 brake fluid
Triumph HD4X Hybrid OAT coolant (pre-mixed)
Grease to NLGI 2 specification
Chain spray suitable for O-ring chains
Specifications
131