XR650L Mod Questions I want to add some items to my bike. I want to let the engine be all it can be, but not at the expense of reliability and to some degree long term durability. I have a xr400, i am going dual sport here, not trail only. So here goes: 1. I need a larger tank, what I am seeing on the blogs is that the INS tank is hit and miss on quality and fit . So it is out. My local Dual sport boutique says that XR650L’s sometime have head overheating problems with some brands of tanks because of airflow changes. I read good things about the Clarke 4.7gal (will most likely buy this one). The Acerbis makes the larger and more expensive tank, and from the picks I have seen it appears that it has wings that (might) grab the air much like the stock tank shrouds. Any thoughts? Link to Acerbis tank: http://www.chaparral-racing.com/Chaparral/productr.asp?pf%5Fid=257%2D1590%2D06&gift=False&HSLB=False&mscssid=718712D4625847B9B355EA9ECC7D3BC7 2. The sky is the limit on engine mods. I will spend some money but I don’t want to get crazy. So I am going to start with: De-smug mod. XRs Only Competition Exhaust, Stock header with exhaust insulation wrap. Mikuni 41mm flatslide Carburetor. Uni Air Filter. Stock cam and Piston. My question, is what gain will I see. Should I upgrade to the Keihin FCR 41mm Pumper, is it work it? Is a 10.5 :1 piston worth the trouble. Is durabilty and overheating an issue with the HC piston? Do cams change the torque curve looseing low end grunt. Is there a diminishing return. 3. Oil Coolers? I like the idea, but this seems real expensive. link https://secure.srcinc.net/prodpage.cfm?Cat_Selected=1&SubCat_Selected=14&Product_Selected=1661&StartRow=11 4. Extended Cylinder Head Fins - added cooling? Also on the shopping list are springs for my weight and case guard, heated grips, better bars ect ….. Family will have no trouble finding gifts for me anymore.