Hey guys, I've spent countless hours on this board searching for "the" answer on how to approach this. I should also say, don't tell me to sell and by an XRR. I don't want to. I've got a lightly modified (pipe, drilled carb, jets, etc) '93 XRL with 20,000kms on it. My goal is to end up making as much reliable power as possible. However, since I'm not running Baja, I'd like that in the mid-range. I do a couple trips per year but mostly just around town. I'd like to be able to get 30,000kms on these mods before I need to worry. Additionally, I do have some money to spend, but I'm not willing to spend $200 more for a carb that's going to give me slightly better throttle response and .25HP. This isn't a budget buildup, but I'm not p!ssing money away either. 1) piston? To address my longevity concerns I was considering the ceramic coated 10.5:1 657cc piston from XRsOnly 2) cam? To address my longevity concerns I was considering the HRC cam because it's completely hardened, not just surface hardened like the HotCams one. 3) valves? XRsOnly has some "Black Diamond" nitroneg impregnated valves available. Are they the best ones? 4) valve springs? I know nothing about this, can anyone make a recommendation? 5) valve guides? I also know nothing about these, can anyone make a suggestion here? 6) heat wrapped header pipe? The flanges on the stocker are ground out already. Is a heat wrapped header pipe still a good idea? 7) carb? XRsOnly has the following ones available. What do you recommend? I should also say that I'm at 3000' elevation and don't have much for carb modding skills. -Keihin FCR Pumper Carburetor Kit 41mm -Mikuni Flatslide Carburetor 41mm -Mikuni Pumper Carburetor 42mm -Mikuni Pumper Carburetor 45mm 8) oil cooler? Given that I don't do much serious off-roading, I think I'll just tie in with some random oil cooler from another bike. 9) temp guage? I think I'll buy an XRsOnly temp guage so I know what's going on in that dept. 10) magnetic oil plug? To keep particles down after the build up. 11) head work? I was also considering doing some porting and polishing myself. I've talked to guys on this board who have done it and they have convinced me it's not hard. However, what about a 3 angle valve job? Any guidance you guys could provide me with would be very much appreciated.