I would go with the same stock chain again, you should look at the side plates on your chain. It should have the chains man. and size stamped on it (ex. D.I.D 525). according to my dennis kirk cat. your bike runs a 16front and 43rear (teeth) sprockets with 108 link chain in 525 grade. If you want better acceleration (at the expense of a couple mph topspeed) you can get a 15 tooth front. 108 links will work with that but your chain wear guide will not be any good any more. This will also throw your speed O off about 7 mph (67displayed will realy be 60).
I have the -1tooth front sprocket on my bike and I like the extra snap in acceleration my self, of course like I said my speed O is off by 7 and my gas milage went down a bit. but the bike is a rocket with it ( and a wheelie monster), I'll leave that up to you. Your back sprocket should be fine, get your self a Dennis Kirk cat. There is all kinds of extra info in there and you can drool over stuff you want!!!
CBR929-jardine race can, down 1, polished frame and swing arm,wheels polished, HELI bars, Sargent seat, Puig racing screen
commuting on a VLX600 shadow for now, 60MPG!!! I punched out the baffles, so it has that V-twin snap and crackle that made H/D so infamous. Except this little scute is rice powered!!lol