Vulcan Excel Spreadsheet for Nerds - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 2 (permalink) Old 05-11-2018, 06:17 PM Thread Starter
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Vulcan Excel Spreadsheet for Nerds

Hey guys, I made this sheet about a week before I bought my bike.

I used a Torque vs RPM Dyno chart I found on this forum to plot the acceleration force vs RPM per gear, and acceleration force vs speed per gear.

In the force vs speed per gear chart, you can see that a stock bike's best shift point for maximum acceleration is right at 8,500 redline. Below that, there's more power still available. Above that the torque is falling off and provides no benefit. Kawasaki did excellent engine to gear ratio matching!

Again, this is for a stock bike. Reducing the intake and exhaust restriction may push the optimal shift point up to 9,000 for those willing to over-rev. I don't have a dyno chart to back that up.

There's also a speed vs RPM for each gear.

I also included a chart that shows the RPM drop. However, my math is not correct on that!

Enjoy, fellow nerds!
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Thorn and lugnut1009 like this.

'89 Vulcan 750 Bought 4/12/18 @ 17805.9 miles $800
Purchased stock. Wrecked once
26980.4+ miles

Completed modifications:
Removed mufflers, straight pipes out of GB
110/90 Front Tire
Pick-up coil re-gapped to .020"
Shindengen MOSFET FH020AA r/r
USB Outlet + Voltmeter
Repainted Metallic Blue w/ new tank bages
Ear Shave (wo/ coasters) 40/140 NO shims 45MPG
MCCT conversion

Planned modifications:
Custom LED turn signals
Highway Pegs
(Possible) ignition advance
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post #2 of 2 (permalink) Old 05-14-2018, 01:59 PM
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Pretty cool! Thanks..

2005 Vulcan 750
Odometer @ October, 2019: 14,200
Purchased May, 2011 @ 2,172
Splines lubed @ 2,962 (were in good shape)
Küryakyn Daily Tour Bag
SS-28 Slipstreamer Smoke
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