Gear ratio's on '65 Pan.....

Post Reply
captainharley
Posts: 52
Joined: Sat Aug 12, 2006 7:54 pm
Bikes: '65 FL
Location: Central FLorida

Gear ratio's on '65 Pan.....

#1

Post by captainharley » Mon Sep 10, 2007 1:32 pm

I need advice from an H-D "physics" type who can tell me what kind
of change to expect from my scooter. If and when I place a '23' tooth
motor sprocket on it. At present it has a '24' tooth motor sprocket.
The rest of the drive line is: '22' tooth on tranny so as to run a stock
speedometer and the rear wheel has a '48' tooth sprocket {'75 Super
Glide swingarm/disc brake set up}. AMF/Ride Safe[/img][/code]



Jack_Hester
Ex-member
Posts: 451
Joined: Sat Sep 18, 2004 7:21 pm
Location: Roxboro, NC, U.S.A.
Been thanked: 2 times
Contact:

#2

Post by Jack_Hester » Tue Sep 11, 2007 8:10 pm

Download this little program and run it anywhere on your machine, as it requires no installation:

http://www.terra-glide.net/pgms/WheelSpeed.exe

When you have the program up and running, you can plug in your numbers and see the changes. Click on 4th gear for the FL, and it will put the default numbers in for you.

Jack

65 Eric
Posts: 59
Joined: Fri Jul 13, 2007 10:35 am

#3

Post by 65 Eric » Tue Sep 11, 2007 10:27 pm

That's so cool, big help for us who can barely add!
thx Jack

Eric

Jack_Hester
Ex-member
Posts: 451
Joined: Sat Sep 18, 2004 7:21 pm
Location: Roxboro, NC, U.S.A.
Been thanked: 2 times
Contact:

#4

Post by Jack_Hester » Tue Sep 11, 2007 10:33 pm

Eric -

The main reason I wrote it is that my brain can no longer do math greater than 10 fingers. So, I made it easy for myself. Then, pass it on to others. Enjoy.

Jack

jlaley
Posts: 79
Joined: Tue Oct 17, 2006 12:18 am
Bikes: 2004 FLHRSI
1954 FL
Location: Rochester NY

#5

Post by jlaley » Wed Sep 12, 2007 4:37 pm

That is very cool Jack. Works great. Mine figures out to 3.73 final. Don't have it together yet so I'm not sure what that will feel like. Should take off nice and easy but it sure will be revving up pretty good going down the road.
Jim

captainharley
Posts: 52
Joined: Sat Aug 12, 2006 7:54 pm
Bikes: '65 FL
Location: Central FLorida

#6

Post by captainharley » Wed Sep 12, 2007 6:34 pm

Jack, you da' man. Thank you that is one cool program. What are you
some kind'a retired rocket scientist or some'm........? AMF/Ride Safe

Jack_Hester
Ex-member
Posts: 451
Joined: Sat Sep 18, 2004 7:21 pm
Location: Roxboro, NC, U.S.A.
Been thanked: 2 times
Contact:

#7

Post by Jack_Hester » Thu Sep 13, 2007 1:38 am

No rocket science, here. Many years ago, I learned Pascal programming language for DOS, for other work. It was the best thing that I could have done. I started digging out the old formulas, pencil scratching, equations for everything that I had to do at the workbench during some point of engine building. I wrote the wheel speed program, out of a need for figuring my first LSR racer gearing (mid 70's Shovelhead). In later years, I found a cheap copy of Delphi for Windows (what Pascal evolved into). I added some simple graphics and print functions (depending on the program). I still haven't gotten around to all my DOS programs being converted. Just the important bike stuff. When I go on vacation for more than a few days, or during the sometimes long lulls at the LSR track, I break out the laptop and work on my conversions. Or, build something new if this tired old brain gets creative enough.

This is my most used program. The one that I'm working on for land speed racing (LSR) goes through the gears, showing the RPM drop between shifts, and speeds at the top of each gear, just before shifting. That's how I figured out that my 45 LSR bike, running a BT 4-speed, will never get out of 3rd gear before running through the traps for a time/speed stamp. This is on a mile track. At Bonneville, torque is all that I have to worry about having enough of. I'll be able to shift into 4th, easy.

Jack
Last edited by Jack_Hester on Thu Sep 13, 2007 10:40 am, edited 1 time in total.

captainharley
Posts: 52
Joined: Sat Aug 12, 2006 7:54 pm
Bikes: '65 FL
Location: Central FLorida

#8

Post by captainharley » Thu Sep 13, 2007 2:09 am

Yep, you be a rocket scientist to this 'ol grease ball biker. Thanks again.

AMF/Ride Safe


"To some people 'Freedom'....
is just another dirty word."

Post Reply

Return to “Transmission, Starter & Shifting”