Stage-3 Driveability
HDF Community Team
Joined: Sep 2013
Posts: 2,373
Likes: 2,342
From: Wisconsin
Stock 107 for comparison:
Last edited by Hulkss; Feb 20, 2020 at 10:40 PM.
Road Captain
Joined: Sep 2019
Posts: 689
Likes: 339
From: Dayton OH
Actually I don't fully understand the chart. I thought it would show cross over shift points like your 2nd chart did. Are your data points only going to 5,500 rpm? What do you consider redline? 6K, 6,200? SE tuner says it allows to 6,400 rpm but my dyno pulls seem to be stopped at maybe 6,200. Dyno operator said its still pulling when it hits the limiter. If that is the case I bet the stage 4 cam would really be short shifted.
HDF Community Team
Joined: Sep 2013
Posts: 2,373
Likes: 2,342
From: Wisconsin
Actually I don't fully understand the chart. I thought it would show cross over shift points like your 2nd chart did. Are your data points only going to 5,500 rpm? What do you consider redline? 6K, 6,200? SE tuner says it allows to 6,400 rpm but my dyno pulls seem to be stopped at maybe 6,200. Dyno operator said its still pulling when it hits the limiter. If that is the case I bet the stage 4 cam would really be short shifted.
Redline is a mechanical limit to prevent engine damage. Maybe 6400 rpm.
Last edited by Hulkss; Feb 21, 2020 at 12:09 PM.
Road Captain
Joined: Sep 2019
Posts: 689
Likes: 339
From: Dayton OH
Well its mechanical leverage based on gear reduction. Notice the stock 107 was over 900 at peak in 1st gear. Lol at 1200 she better hang on tight. 
Something odd though using the calculator chart for the 30/70 sprocket & pulley that I run shows 150 mph to be 6,227 rpms. This doesn't match very well with the above chart. I'm sure Hulkss will have some insight & thoughts.
Something odd though using the calculator chart for the 30/70 sprocket & pulley that I run shows 150 mph to be 6,227 rpms. This doesn't match very well with the above chart. I'm sure Hulkss will have some insight & thoughts.
Last edited by VernDiesel; Feb 21, 2020 at 02:37 PM.
Stellar HDF Member
Joined: Aug 2008
Posts: 2,107
Likes: 283
From: California, Md now Savannah, Ga
20,000 miles with Stage 3 107 to 114 and very satisfied with low end performance and overall power, driveability and reliability. Of course, now I'd probably be considering the 128 upgrade kit. Hope to ride both a 128 and 131 kit a couple of weeks from today if H-D has them in their demo fleet at Daytona Bike Week.
HDF Community Team
Joined: Sep 2013
Posts: 2,373
Likes: 2,342
From: Wisconsin
Well its mechanical leverage based on gear reduction. Notice the stock 107 was over 900 at peak in 1st gear. Lol at 1200 she better hang on tight.
Something odd though using the calculator chart for the 30/70 sprocket & pulley that I run shows 150 mph to be 6,227 rpms. This doesn't match very well with the above chart. I'm sure Hulkss will have some insight & thoughts.
Something odd though using the calculator chart for the 30/70 sprocket & pulley that I run shows 150 mph to be 6,227 rpms. This doesn't match very well with the above chart. I'm sure Hulkss will have some insight & thoughts.
The plotted points are every 500 rpm ending at 6000.
Last edited by Hulkss; Feb 21, 2020 at 03:05 PM.
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Road Captain
Joined: Sep 2019
Posts: 689
Likes: 339
From: Dayton OH
Xcrossbox Same here if H-D would have made that announcement about 60 days sooner I probably would have waited and went from a 107 to a 128. Lol I still might do a 128 in about 22 months from now. I had not thought of that, we're trying to make some Daytona Bike Week plans this weekend. A demo ride would be cool. Did you ever dyno it?
Last edited by VernDiesel; Feb 21, 2020 at 03:15 PM.
HDF Community Team
Joined: Sep 2013
Posts: 2,373
Likes: 2,342
From: Wisconsin
Rear wheel torque, not engine crankshaft torque. First gear on his bike is a torque multiplier of 10.534.