i know alot of you guys have questioned what exactly was happening when i machine the secondary for the CVtech primary. the CVtech primary will fit on your machine and run fine without the secondary machined, but owners who want the best gains, the machined CVtech primary coupled with the secondary machining will give the best gains! when i machine the secondary, i make the secondary close up further, so it will get the belt higher in the secondary, to give max low end gains and properly tension the belt. with the secondary not machined it will max out its throw before it gets the belt to the max tension not allowing the belt to get any tighter as it wears down. after the secondary is machined it will close up more, squeezing the belt tighter, and higher in the secondary. the CVtech primary alone will give you about 18% lower gear ratio. with the secondary machined it will increase the low gearing to 22-25% lower gear ratio along with keeping the belt tight at all times and never letting it run loose.
here is a picture before the machining to a bone stock secondary
now here is the pictures, showing the secondary machined and showing how much more it will close up. this 2mm more closing ability will put your belt nearly 5mm higher in the secondary than it will go before the machining. this will get your belt nearly 1/4"-5/16" up out of the top of the secondary giving you max low end.
here is a picture before the machining to a bone stock secondary



now here is the pictures, showing the secondary machined and showing how much more it will close up. this 2mm more closing ability will put your belt nearly 5mm higher in the secondary than it will go before the machining. this will get your belt nearly 1/4"-5/16" up out of the top of the secondary giving you max low end.


