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.