OK this weekend I take a trip with other cruiserheads to the beach ( pretty easy here in Panamá .. ) and I take time to measure really speed in my " Tencha " with GPS ..
now I'm very happy coz the Garmin talks about with my actual setup I'm pretty close to stock gearing with pretty close speedo reading ..
I reach 100 km/h ( pretty nice speed to me ) @ 2500 rpm in my 2H reading the exact same speed in my factory speedo.