On my Cr the only thing I've done is remove the reed spacer. I'm looking to increase it's overall power, to pull longer and harder maybe a little more over-rev. I really like the power band and don't want to change its characteristics too durasticly. From what I've been reading the V-force reed assembly and SST pipe combo will do wonders. For now I'd like to keep the cost down by not sending the motor away, but I'm open to that later in the summer. Any help is greatly appreciated.