Sonic Fiddlestick SO 50-1

Fiddlestick

SO 50-1

Motor springs are not always bent the same-to get the most from your motor-you need equal brush spring tension on your motor brushes. By having the same and correct spring tension you will get

#1 A cooler running and Longer Lasting Motor

#2 Longer Motor Brush Life

#3 Higher RPM

With the Sonic Fiddle Stick
you can check your motor spring tension right on the motor
if they are not equal (the same tension) bend the spring and check it again.

With the Spring Jig you can pre set spring tension before you install them
do one set or more and have them ready when you need them.

Use what the Pros Use

A Sonic Fiddle Stick is a Must Have for any Slot Car or RC Racer !!!!!!!