I had my bike (2019 FLHCS) tuned on a Dynamometer with the Harley Pro Street Tuner. The RPM limit can be set as high as 6400 with this tuner. Do I need to go this high?

I took my "Dyno Sheet" and plotted the torque curve data at 500 rpm intervals extrapolated a little out to 6000 RPM.

Knowing this engine torque data, combined with the bikes overall gear ratios, the torque at the rear wheel can be calculated. I did that for each gear and plotted it with road speed for the stock rear wheel diameter.

To accelerate the quickest, you want to keep rear wheel torque as high as possible. That means shifting at redline or sooner if the next higher gear will give you more rear wheel torque. For my bike, there is no performance gain in revving the motor higher than the points shown. That is due to the drop in torque at high rpm.

Since I'm never riding around in first gear, I'm going to set the rev limiter at 5900. That way I protect the engine as much as possible while keeping maximum performance for overtaking.

Dynamometer Run

Plotted Torque Data from Dyno

 

Very cool! My max torque is about 200 rpm lower than yours, gear ratios are the same but the Fat Bob rear tire diameter is different, I would think my shift points would be close. I noticed my rev limiter is set at 7000, know dang well that I do not need to rev that high

 

posted as you instructed

 

Here's the results for that FXFBS with the CR-480 stage II:


CR-480 Stage II 114

 

Very much appreciated, thank you!

 

Save a little wear and tear from too much rpm and go quicker at the same time!

Shifting 3rd to 4th at 100 mph when passing someone must be fun!!

 

I have probably done this lol.

 

Newbie here ....BE NICE!....... So, with a M8 softail bike,stage 1,for maximum acceleration, more or less shift at what? 4K? T I A.

 

Here's the power and torque for a stock 107 Fat Bob as measured by Cycle World", followed by the best shift points for maximum acceleration.

 

Thanx! I shoulda known a helluva lot tighter!