Went for a 250 mile run on Saturday with my Lady and two other bikes riding 2 up.
About 50-50 on HWY riding and country road riding. Mileage: 31.6 MPG for the trip
Taking off from dead stop: Requires more throttle and cannot just ease the clutch out like I can riding 1 up. Still much better than the 103 with 255's
Very little corner to corner downshifting compared to the old motor
75-80 MPH cruising on the HWY's was not affected by hills and headwinds
Temp's on the way home approaching 100 Deg and had no pinging issues in the In-town, stop light riding
Several hard takeoffs and pulled both 103 Bikes without straining it (both bikes have exhaust and Dyno tune) and never twisted it above 5200 RPM. red line is 6200 RPM but I am waiting to get 1000 miles on the build before maxing it out
The TQ comes in right off Idle and continues to pull really hard.
IMO...this Low end TQ is a result of the following
1. 110 CI
2. 10.25 Compression
3. Tune by Steve @ GMR
4. Heads designed for low speed air velocity as well as Hi-Lift flow. Frank Dragos said with this design, the heads give up a little CFM on the Hi-Lift side but maximize the low speed velocity to help the low end TQ (gain 8-12 #'s TQ on the bottom end and lose 3-5 HP on the top end, I will take that every time with these heavy beast)
5. GMR 577 cam is a great Mid-range cam that makes great low end power if given enough compression, while still carrying the power to 6000 RPM
6. Staying with stock 50 MM Throttle body for the low speed TQ VS 58 MM for high RPM Power
Really loving the way Elvira rides now. 1 up or 2 up she makes me smile

About 50-50 on HWY riding and country road riding. Mileage: 31.6 MPG for the trip
Taking off from dead stop: Requires more throttle and cannot just ease the clutch out like I can riding 1 up. Still much better than the 103 with 255's
Very little corner to corner downshifting compared to the old motor
75-80 MPH cruising on the HWY's was not affected by hills and headwinds
Temp's on the way home approaching 100 Deg and had no pinging issues in the In-town, stop light riding
Several hard takeoffs and pulled both 103 Bikes without straining it (both bikes have exhaust and Dyno tune) and never twisted it above 5200 RPM. red line is 6200 RPM but I am waiting to get 1000 miles on the build before maxing it out
The TQ comes in right off Idle and continues to pull really hard.
IMO...this Low end TQ is a result of the following
1. 110 CI
2. 10.25 Compression
3. Tune by Steve @ GMR
4. Heads designed for low speed air velocity as well as Hi-Lift flow. Frank Dragos said with this design, the heads give up a little CFM on the Hi-Lift side but maximize the low speed velocity to help the low end TQ (gain 8-12 #'s TQ on the bottom end and lose 3-5 HP on the top end, I will take that every time with these heavy beast)
5. GMR 577 cam is a great Mid-range cam that makes great low end power if given enough compression, while still carrying the power to 6000 RPM
6. Staying with stock 50 MM Throttle body for the low speed TQ VS 58 MM for high RPM Power
Really loving the way Elvira rides now. 1 up or 2 up she makes me smile
