Ew, get the DynoJet kit.
Don't let some schlub down the street put a bigger secondary, or primary mains in it.
The DynoJet kit comes with 3 or 4 sets of jets, along with an adjustable needle (4), and 4 tiny brass plugs for some air jet, that isn't necessary.
Study the instructions carefully. Follow the instructions absolutely to the letter. Dont do block off plates or anything else like that, just yet. I looked for the remains of the kit that l got, but could not find it. I will look some more, here in a bit.
I think there is a chart that tell you what to put in, but l called DynoJet. I think l talked to a guy named Mike. I told him what altitude, average temp, intake mod (none) exhaust. I wrote down what he told me to put in.
I dont know if the bike makes more power. I like to think so, but my butt dyno is just as worthless as every one elses. I guarentee my 599 runs a whole lot better, smoother, and sounds happier. Even with the -2 sprocket, on the rear, if l pin the throttle at say, 5000 rpm, the front end starts to come off the ground at about 8500 rpm.
The rear sprocket is a Sunstar. The front is stock.
The chain is a gold DID. It is what ever stock size is. 525?
I want to hear about what the gold valves do for your front end. LDH, if you are there, tell me what you think about gold valves. It is a humble street bike, but if there is a noticable improvement in compliance, l'm in.
Another cool thing about the 599 is that it was made in Italy. The rectifier on mine says : Ducati. You dont see made in Japan anywhere.