noz is only good for when your on the button.. id have to say clutch and gearing.. unless you want good power.. then your spending money. 5g will get you somethign like what 10 15hp..
I was talking to a XP guy last year in the hot tub ---(Nothing gay at all---- Besides the ski-doo Lol) Anyways he was doing lots of reserch into hoppping up the 800, and he claimed the 860 kit was the way to go, He claimed almost the same power as a turbo but zero turbo lag, and not just seconds of nitro fun.
just second hand information, But that is the way Id go personly.
I put a RK head and piston kit into my 09 800 and it rips pretty god now! Its about a grand for the kit. And also I put a DJ clutch kit and Boysen Rage cage into it to and thats about $800.
For real tho I herd lots of good aboutthat piston kit and head for the doos. I would imagine with a set of pipes this set up would be very well rounded.
"Whats the differance between Rotax and Kotex?....... They are both for pu$$ies!!"