Torque Spring Athena Minarelli THERMOMETER Originally used on the Polini
Baker’s notes & crumb story
Description
Torque Spring Athena Minarelli THERMOMETER Originally used on the Polini Originally used on the Polini Corsa engine kit It delivers its power more than 1000 rpm higher than a stock exhaust and offers a little less restriction which is not a bad thing on a 70cc engine The Athena spring range is of very high quality There are 3 models available Blue (soft)