65cc Aftermarket Minis Progressive Power Valve Control Spring

Aftermarket Minis Progressive Power Valve Control Spring will control how the power is delivered to your bike. The stock OEM spring is a soft single rate spring that just open and closes your power valve blade causing an on / off power delivery. Our progressive spring will open a little as you take off giving you low end power and will progressively open the power band giving you a much nicer mid rage power delivery before opening all the way up giving you your top end power. This is one of the best upgrades you can do to a 65.

Install spring with the closer coils going up towards the membrane case. 

This is for spring ONLY but we do offer our own power valve blade as well. Picture of our power valve blade is just to show the direction of how the spring is installed.