Just bought a used XR650L for my brother. I need some basic info. The stock front and rear sprockets- need to go one tooth down in the front, but I don't know if it already has one down. I also need to know the stock jetting so I can adjust up. Also this bike has the forks raised into teh tripple clamps about an inch- is this the stock position? I don't have an owners manual can I get one on a web site? If not which way do I turn the comp and rebound dampening on the rear shock for more? Thanks I'll need more answers later. This bike has a stock exhaust and K&N air filter with an additional filter blanket aroung the K&N guaze. Do I oil that with the same K&N oil?