The Jockey Journal

whizzerick · 01-03-2009, 09:21 AM

Local code requires a working speedometer, as per OEM in 1974.

Since I'm running an early Sporty drum instead of the original single disk (1), I can't use the '74's speedo drive/spacer up front.

Besides, I don’t want to clutter the front end with a cable and a speedo. I fabricated a bracket and installed the speedo to the left of my seat (2).

Instead, I thought I could use the rear wheel to drive the speedometer. There is ample room on the left side (3).

With a BFH in a vise, I cracked open the original speedo drive, revealing the precious inner elements that will be used in the project (4).

I carefully measured everything (5), and essentially reverse-engineered a new speedo drive/spacer from the parameters of the original (6).

Using basic woodworking tools (7), I built a casting pattern that will provide a 'blank' for machining the drive/spacer (8).

Menu board letters are added forming the AMF anagram, to stump the HD experts as to the origin of the part ... (9).

The pattern is painted, 'gating' is added (10).

Because of the shape of the work, a follower has to be prepared out of plaster and plywood. We are ready to cast (11).

whizzerick · 01-03-2009, 09:23 AM

I cast a blank in beautiful yellow brass, a strong alloy with a very high machinability index (12).

And machined away (13). This is all very new to me, and I'm learning as I go.

Everything went according to plan (14). I will probably have to bend the tang of the drive's 'arm' upon assembly to seat it in the hub's recess.

(To account for the reduction in wheel circumference (94,72%), the speedo face will be re-calibrated with additional spacing between numerals) (15).

CB550 Matt · 01-03-2009, 09:31 AM

nice fab work, you get out to ride test it yet?

littlebike · 01-03-2009, 09:32 AM

Hot Dam, You got some major Skills, but you know that .Awesome!!

NaK · 01-03-2009, 09:39 AM

Holy shit. I can't get enough of this type of stuff.

whizzerick · 01-03-2009, 09:41 AM

Quote:

Originally Posted by CB550 Matt

nice fab work, you get out to ride test it yet?

I wish... This is a pic of my backyard at 5 am this morning.
That glow is from my inground pool fence lighting...

chip · 01-03-2009, 10:54 AM

Holy shit, southern boy here. I have never been in snow that deep. Don't think I would like it much. I'm already jonesin for spring and summer. I cant stand the short gray days of winter.
The speedo drive is nice work.

zboy403 · 01-03-2009, 11:25 AM

I'm very very impressed! Nice fabbing!

Bumpstick · 01-03-2009, 11:37 AM

Beautiful!!!!

ElkCreek · 01-03-2009, 11:52 AM

Awsome post! Thanks a ton. I suck at Math, so Im out...But The casting principal is something I will try with less "precision" required parts. Good to see how little it really requires to produce a one-off part. NO CNC's!!

Basic tools. Cool Shit!! 20 feet of snow outside helps too!!

SltyDog · 01-03-2009, 12:08 PM

Now that is impressive. Amazing work.

littlejoe631 · 01-03-2009, 12:14 PM

real nice job

big_b · 01-03-2009, 12:15 PM

wow, thanks for that awesome tech post.
what did you make your mold outa? sand? and how did you melt the brass?
thanks,

InvisibleKid · 01-03-2009, 12:21 PM

Insanely cool...
Great craftsmanship.
.

M.O.Ther · 01-03-2009, 01:50 PM

As always, topnotch work from Whzzerick. The guy's an artist and an inspiration.
Dragstews mentions the VDO electronic kit, there are even more options if you want a rear wheel driven speedo. Harley-Davidson rear wheel drive speedo kit (67400-97) was designed for guys putting an FLSTS springer on a '86-'95 Softail. It could be adapted to other uses, but you do need to use the 2240:60 ratio speedometer.
It's obsolete from H-D but there are 60+ dealers in the country who list one in their inventory. A friendly H-D parts guy could locate one for you. (or I could - PM me.) MSRP $73. Oddly enough (maybe not for Harley) the label on the kit says "Made in United States," but the one on the included cable (64701-97) says made in Taiwan ROC (Right Outside Cleveland) and the drive unit has "Japan" cast into the body.

Troy Fab · 01-03-2009, 03:50 PM

Wow, how do you think of this stuff?

Markee · 01-03-2009, 04:17 PM

Coolest shit i've seen on this site right there. I'd love to learn how to cast small pieces like that in the near future.

Thanks for the post and time to put that together.

Billdozer2 · 01-03-2009, 05:03 PM

Outstanding!

Unkl Ian · 01-03-2009, 05:21 PM

Quote:

Originally Posted by Troy Fab

Wow, how do you think of this stuff?

He is either absolutely brilliant, or an evil genius.

Maybe both.

Neo Dutch · 01-03-2009, 08:19 PM

Gub, agub, aguba. Wow.

01-03-2009, 09:21 AM	#1
whizzerick Senior Member Join Date: May 2005 Location: Montreal, QC Posts: 706	Tech: a REAR wheel speedo drive Local code requires a working speedometer, as per OEM in 1974. Since I'm running an early Sporty drum instead of the original single disk (1), I can't use the '74's speedo drive/spacer up front. Besides, I don’t want to clutter the front end with a cable and a speedo. I fabricated a bracket and installed the speedo to the left of my seat (2). Instead, I thought I could use the rear wheel to drive the speedometer. There is ample room on the left side (3). With a BFH in a vise, I cracked open the original speedo drive, revealing the precious inner elements that will be used in the project (4). I carefully measured everything (5), and essentially reverse-engineered a new speedo drive/spacer from the parameters of the original (6). Using basic woodworking tools (7), I built a casting pattern that will provide a 'blank' for machining the drive/spacer (8). Menu board letters are added forming the AMF anagram, to stump the HD experts as to the origin of the part ... (9). The pattern is painted, 'gating' is added (10). Because of the shape of the work, a follower has to be prepared out of plaster and plywood. We are ready to cast (11). __________________ www.royalspeed.com

01-03-2009, 09:23 AM	#2
whizzerick Senior Member Join Date: May 2005 Location: Montreal, QC Posts: 706	Re: Tech: a REAR wheel speedo drive I cast a blank in beautiful yellow brass, a strong alloy with a very high machinability index (12). And machined away (13). This is all very new to me, and I'm learning as I go. Everything went according to plan (14). I will probably have to bend the tang of the drive's 'arm' upon assembly to seat it in the hub's recess. (To account for the reduction in wheel circumference (94,72%), the speedo face will be re-calibrated with additional spacing between numerals) (15). __________________ www.royalspeed.com

01-03-2009, 09:31 AM	#3
CB550 Matt Senior Member Join Date: Jul 2008 Location: Seattle Wa Posts: 367	Re: Tech: a REAR wheel speedo drive nice fab work, you get out to ride test it yet?

01-03-2009, 09:32 AM	#4
littlebike Senior Member Join Date: Jan 2006 Location: buffalo ny Posts: 772	Re: Tech: a REAR wheel speedo drive Hot Dam, You got some major Skills, but you know that .Awesome!! __________________ WWILD

01-03-2009, 09:39 AM	#5
NaK Senior Member Join Date: Aug 2008 Location: Allegan, MI Posts: 194	Re: Tech: a REAR wheel speedo drive Holy shit. I can't get enough of this type of stuff. __________________ www.nakstudio.blogspot.com

01-03-2009, 10:54 AM	#7
chip Member Join Date: Dec 2008 Location: south carolina Posts: 45	Re: Tech: a REAR wheel speedo drive Holy shit, southern boy here. I have never been in snow that deep. Don't think I would like it much. I'm already jonesin for spring and summer. I cant stand the short gray days of winter. The speedo drive is nice work.

01-03-2009, 11:25 AM	#8
zboy403 Senior Member Join Date: Dec 2008 Location: Gbg, PA Posts: 110	Re: Tech: a REAR wheel speedo drive I'm very very impressed! Nice fabbing!

01-03-2009, 11:37 AM	#9
Bumpstick Senior Member Join Date: Jun 2005 Location: Los Angeles Calif. Posts: 257	Re: Tech: a REAR wheel speedo drive Beautiful!!!!

01-03-2009, 11:52 AM	#10
ElkCreek Senior Member Join Date: Oct 2008 Location: Northeast Iowa Posts: 341	Re: Tech: a REAR wheel speedo drive Awsome post! Thanks a ton. I suck at Math, so Im out...But The casting principal is something I will try with less "precision" required parts. Good to see how little it really requires to produce a one-off part. NO CNC's!! Basic tools. Cool Shit!! 20 feet of snow outside helps too!! __________________ Illegitimi Non Carborundum ( Dont Let The Bastards Grind Ya Down)

01-03-2009, 12:08 PM	#11
SltyDog Senior Member Join Date: May 2006 Location: Oregon Posts: 977	Re: Tech: a REAR wheel speedo drive Now that is impressive. Amazing work.

01-03-2009, 12:14 PM	#12
littlejoe631 Member Join Date: Dec 2007 Location: long island ny Posts: 56	Re: Tech: a REAR wheel speedo drive real nice job

01-03-2009, 12:15 PM	#13
big_b Senior Member Join Date: Jan 2007 Location: Victoria B.C Posts: 296	Re: Tech: a REAR wheel speedo drive wow, thanks for that awesome tech post. what did you make your mold outa? sand? and how did you melt the brass? thanks,

01-03-2009, 12:21 PM	#14
InvisibleKid Senior Member Join Date: Mar 2007 Location: Atlanta, GA Posts: 739	Re: Tech: a REAR wheel speedo drive Insanely cool... Great craftsmanship. . __________________ "If you're havin' girl problems I feel bad for you son, I've got 99 problems but the bitch aint one!"

01-03-2009, 01:50 PM	#15
M.O.Ther Senior Member Join Date: Oct 2006 Location: Toledo, OH Posts: 780	Re: Tech: a REAR wheel speedo drive As always, topnotch work from Whzzerick. The guy's an artist and an inspiration. Dragstews mentions the VDO electronic kit, there are even more options if you want a rear wheel driven speedo. Harley-Davidson rear wheel drive speedo kit (67400-97) was designed for guys putting an FLSTS springer on a '86-'95 Softail. It could be adapted to other uses, but you do need to use the 2240:60 ratio speedometer. It's obsolete from H-D but there are 60+ dealers in the country who list one in their inventory. A friendly H-D parts guy could locate one for you. (or I could - PM me.) MSRP $73. Oddly enough (maybe not for Harley) the label on the kit says "Made in United States," but the one on the included cable (64701-97) says made in Taiwan ROC (Right Outside Cleveland) and the drive unit has "Japan" cast into the body. __________________ If some is good, then more is better, and too much is just about right.

01-03-2009, 03:50 PM	#16
Troy Fab Senior Member Join Date: Apr 2007 Location: Greene, Rhode Island Posts: 893	Re: Tech: a REAR wheel speedo drive Wow, how do you think of this stuff? __________________ Steve Jock Shop: http://www.jockeyjournal.com/forum/s...eferrerid=3894 www.troyfabrication.com

01-03-2009, 04:17 PM	#17
Markee Senior Member Join Date: Apr 2008 Location: Suffolk, VA Posts: 501	Re: Tech: a REAR wheel speedo drive Coolest shit i've seen on this site right there. I'd love to learn how to cast small pieces like that in the near future. Thanks for the post and time to put that together. __________________ Kilby Deuce - American Made Cycle Parts - USA Newly Added: Stainless Adjustable Handlebar

01-03-2009, 05:03 PM	#18
Billdozer2 Senior Member Join Date: Jan 2007 Location: Murrieta, CA Posts: 1,398	Re: Tech: a REAR wheel speedo drive Outstanding! __________________ Biltwell • Chop Cult

01-03-2009, 08:19 PM	#20
Neo Dutch Senior Member Join Date: Oct 2005 Location: Oz Posts: 1,026	Re: Tech: a REAR wheel speedo drive Gub, agub, aguba. Wow. __________________ MISSING: One JJ inspired comedy avatar. If seen please PM.

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