Honestly, this bike is such a new model there's not much out there. I pioneered the longer suspension upgrade. I used FORSA (EMGO) shocks for a Sportster because they were the length I wanted, sprung for a bike that weighs similarly, and had black bodies with red springs. I had to fit new metal spacers inside the rubber bushings (Harley is 1/2" and Yamaha is 14mm), and grind away part of the rear brake line guide bracket, as it would hit the stock muffler bracket with the longer shocks. (If you go with an aftermarket exhaust this problem doesn't exist). The rear is 1.75" longer than stock. Sliding the fork tubes down in the trees .25" gives a 1.5 difference between front and back, and this is great for quickening the handling. (Stock this bike has miles and miles of trail and slightly slow steering, so there is plenty of wiggle room).
There are lots of shocks out there, you don't have to use the ones I chose. In fact I'd recommend against it, as you'll have to machine or buy (and then cut to length) spacers for the shocks, and that's not something an average joe can do.
Note you can't go with long-travel shocks because of the belt drive. Not without ka-jiggering a belt tensioner, at least.
As far as investment, the front was free. I spent $130 on the rear shocks and $15 on the spacers. Cutting and grinding the bracket was free, and i had a can of rustoleum on my shelf, which I used to repaint the bracket. I also welded an extension onto my side stand foot, because the bike leaned WAY over after this mod. You can just drag around a small piece of 2x4 if you'd rather though. That's cheap and easy!
Charles.
