Hey!!!! Good score, did it say the brand i.e. Naraku, polini etc? I have the Naraku cam on my 250, have over 10,000km on it and still going strong. Nothing special needed to install, although it's not an "easy" job. The first time will make you frustrated. You need to unscrew the timing mark cover, flathead cap on the side of the engine by the dipstick. Align the crank on the T, and look where the cam is. It'll make sense if you've adjusted your valves before. Once you get it on TDC (top dead center), you need to loosen the cam chain tensioner, below and kind of under the carb. Unscrew the Phillips cap in the center of the diamond thing, then turn the center clockwise with a skinny flat screwdriver, it'll kind of lock open then the chain will have slack. Remove the 4 12mm bolts holding the rocker assembly, these are also your head nuts. The rocker assembly should come off with minimal drama. Pull the cam out, make sure the chain doesn't fall back into the case, i use a long screwdriver to hold it up. Installation follows disassembly. Make DOUBLE SURE before you start the T is lined up and the cam marks are lined up, one tooth off and your bike will run like crap or not at all. When I built my engine, it was like 1am by the time I was throwing in the cam and i ended up putting it in 180 out, didn't run and i thought it was screwed, after a long night sleep it was obvious in the morning what i did wrong. I'm not sure how much performance the cam added because I got the bike blown up and my first start was with the cam and everything else. One thing I've noticed, the higher lift requires more frequent valve adjustment, i do mine every 1000km, along with oil and everything else. You'll also want to break the cam in like a new cylinder, lower revs for about 500~ miles. Make sure you use a torque wrench for the cylinder head nuts, torque with oil on threads, then recheck after a few heat cycles.
