I got my 2010 for Enduro's and general Woods riding. The Power Commander Upgrade, as you call it is merely using a PC V to amend the stock FI settings for better throttle response and performance. Stock, the mapping is set to a specific way so that the bike is compliant with all US req's for import. So most will want to get the bike dialed in for max performance prior to real use in the woods.
The Power Up is merely removing the O2 sensor and installing the plug and then plugging the supplied shunt plug in place in the harness. This causes the ECU to switch to a better map than stock, but not as good as you can get the FI system working, just better than stock. The other thing is to remove the Air intake restrictor. Technically, the dealer cannot remove the emissions stuff, but that needs to go too!
Before I picked it up, I talked to my dealer and had him do the power up, install the Husky Factory Race ECU for the 310 (PART #COD 8000H2002 for the 310 with the short Db killer) in place of the stock ECU, remove all of the other non essential stuff and tune the bike.
I picked it up and have been riding it like that since minute one. It rips. Runs strong, idles well and smooth. Comes off idle all the way up the rpm range smooth and linear. You'll hear other opinions about break in and not to power up till xx hours or so, your call. I chose to set my bike up from the get go and it is a sweet powerband with this ECU mapping.
I am getting a consistent 40-42 miles per gallon of normal, mid throttle trail riding. I really don't want to get a larger tank, I like the way the bike feels as is and 60-70 miles is plenty for me between gas stops.
I am not saying you won't have good success with a PCV. But that is not the only option for a better tuned FI system for the 310. I went the Factory route as they usually do a pretty good job with no "DOT/EPA" considerations regarding mapping and such. Plus it is all Husky parts on my bike. Anytime you add a non OEM "box" to a system, you have added additional places where you "could" have issues, so if you were to experience some issues up stream, don't for get those connections in the loom. You can always dis connect it and go back to stock if the PC did have an issue on a ride.
PC info for the 310 here
http://www.powercommander.com/power...dl=270&yr=23-001&pcVersion=PCV&PartNum=23-001
There is also the JD Jetting option. He also makes a box you run ontop of the stock ECU with the power up envoked. Good reports from that box also.
http://www.jdjetting.com/xcart/product.php?productid=122&cat=8&page=1
So, Factory ECU Race mod with Db killer (210 bucks), PC V with auto tune (369 bucks for the PC V and then 259 bucks for the auto tune sensor if you want that) or a JD Jetting box (210 bucks). You decide! Like I said, my pref is as close to stock as possible from a wiring perspective as long as I get good performance, and with the Husky Race ECU option, I am very happy.
You get more tuning capability with the PC V vs. the JD Jetting box, but you need a competent tuner and a Dyno if you don't run the auto tune option to maximize the mapping with the PC V. JD Jetting box is not as tunable but does have plenty of adjustment for most needs from what I have read.The Factory ECU is only as tunable as a stock bike via IBeat. So that is why the PC option costs more. Do you want the ability to modify and tweak above IBeat capabilities? then you might need the PC V option or a JD Jetting box if that meets your needs.
IRT the forks, I believe the zokes on the 2010 is a single chamber fork, not the twin chamber ones, but I like mine just fine so far. I am a B rider, so not really stressing the bike as hard as a A rider would.
it is a great bike. Runs good low/mid/high, chugs and revs out good. I am really liking this bike. I replaced a KTM 200XC with this bike and it is about the best 4 stroke small bore I think you can get that is "2 stroke like".