Trike models require adapter kit (not included)

the faster the slide opens the quicker the throttle response

higher lifts for better performance

Fits: > 89-93 EVO B

custom and replica aftermarket Springer forks

Hasting Rings Pan/Shovel 74" +.070 Ram delar Trike models require adapter kitStd cyl. bore: 3. 4375" (87. 312mm). 1st ring: 1. 6mm. 2nd ring: 1. 6mm. oil ring: 4. 75mm. Tech tip: Piston grooves vs piston rings. It's not difficult to determine if a Hastings piston ring set will fit a certain piston. You should measure the height of the piston groove in the piston itself. The 2 top grooves will be for compression rings, the lower groove will be for the oil ring. In most cases Hastings oil rings are of the low tension 3 piece