morning all, I am thinking about buying a 1992 R 100 R , can anyone tell me where I can get detailed info about this model? the owner says it has 40 mm carbs, what size valves should be on this bike ? how can I tell? and the big question, will there be a major improvement over my 1990 R 100 GSPD with 32 mm carbs ? thanks in advance Chuck PS I love my PD, I just wish for a little more top end, for safe passing!