HPI Racing starting pin and pressure spring are constructed of steel. These parts are installed into the back of the crankshaft and is what the starting shaft keys into to engage the recoil.
Requires: Installing into the engine following the engine's manual
Length: .167" (4.25mm)
Diameter: .110" (2.81mm)
Length: .248" (6.3mm)
Diameter: .101" (2.5mm)