Author Topic: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..  (Read 467 times)

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Offline yarddogg77

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80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« on: January 22, 2018, 09:41:42 AM »
I have a Frankenshovel that I need some help with. It's a 1972 FL With a set of 80-83 Front Fork lowers. The wheel is a 21" Dual Disk, 2" rotor holes for 10" rotors made for 1980-1999 Wide Glides (FXWG). So far so good, the trouble is I have an S&S 5 speed conversion transmission which will not accommodate a Speedometer Cable, so there is no speedometer hooked up. I would like to find a front speedometer gear that will work. I'm not worried about the clock since I can find those everywhere, I can find speedo gears everywhere too, but there are so many of them I don't know which one to get. Here is a picture of the fork style I have. I would rather not deal with a rear speedo gear, because I am using a wheel from some newer bike with an aluminum hub and an FX swing arm with disk brakes. I don't believe my rear rotor or sprocket has a square peg for one anyway. Maybe I could adapt one, but I would rather just find a front gear. Any help on a part number would be appreciated.
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Offline yarddogg77

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #1 on: January 22, 2018, 09:53:03 AM »
Here's the thing, I'm not completely sure if my forks are the same as what would be on a 80-83 FXWG, almost everything I have found indicates that it is. According to the vendor I bought my wheel from, it is for an 80-99 FXWG, so if there is anyone with a 80-83 FXWG (Wide Glide), could you comment on your front end and wheel configuration for me? I fund this Speedo Drive on J&P Cycles that looks promising, but I'd like a little feedback first.

https://www.jpcycles.com/product/730-156/front-wheel-speedometer-drive
My shop has a grass floor and really high ceiling... Yard - Dogg

Offline yarddogg77

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #2 on: January 22, 2018, 10:06:51 AM »
You know what, I'm gonna order that thing, I think it will work. I think those forks are for a FXWG, according to most of the e-bay listings. Solved...I Think... :scratch:
My shop has a grass floor and really high ceiling... Yard - Dogg

Offline billbuilds

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #3 on: January 22, 2018, 02:57:59 PM »
      Yes, it looks like you have 80-83 FXWG style fork slider assemblies. As you may know, the stock 80-83 FXWG's had tranny-driven speedo's not front wheel driven ones. I am wondering if there is a notch in your front wheel hub to accept the stem on the speedo drive? How about the rotors, are they notched? The 77-84 {added: 35mm narrow glide} dual disc FX wheel hubs accepted rotors with 2-3/8" holes. Both sides of the hub flange had the notch for the speedo drive tab. Bill
« Last Edit: January 22, 2018, 03:26:22 PM by billbuilds »

Offline HotRodShovel

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #4 on: January 22, 2018, 03:47:42 PM »
No speed sensor door on the transmission?
Sometimes life is like trying to share a sandwich with Rosie O'Donnell. 
John

Offline Evo160K

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #5 on: January 23, 2018, 08:44:10 PM »
Yarddogg77,

My 1990 FXSTC with wide fork and 21" wheel looks to have the identical sliders as yours, even has the bosses.  The part numbers in the 1990 Harley Parts book are

67120-84B  Drive Unit
676024-84A  Cable Assy.
67118-87  Drive Seal

If your rotor doesn't have a notch for the drive, perhaps you can add one with a file or drill.

Offline jeffscycle

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #6 on: January 24, 2018, 09:59:33 AM »
   OEM WG & FL's were 1:1 ratio off the tranny, Softails are 2240:60 ratio, and other NG or OEM front drives were 2:1. The Easy way to do it is to go the entire Softail 2240:60 route (speedo, Everything), as the parts are easier to come by & cheaper. The Softail drive unit incorporates the spacer, and may need altering in length, and you can notch the rotor I.D. pretty easily for the drive finger.
'01 FXDXT, '99 FXDL/XRD, '76 FLH

Offline 76shuvlinoff

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #7 on: January 26, 2018, 02:36:56 AM »
I have not needed it in years but J&P Cycles used to have a page (I'm talking a hard catalog here) that showed all the drive units . You have to be careful selecting them as to which side of the wheel they mount on and the length of the spacer.

 Over the years with my FLH using aftermarket brake systems and transmission, I've had it on both sides of the front. In my journey with this bike eventually I installed a 2000 and up front end with dual 4 piston calipers and a rim off and 07 RK so I moved the mechanical drive to the left rear.  After all that going electronic might have been easier and cheaper but I was leery of doing that (it probably would've been fine).

 Mark
Being defenseless does not make you more safe.

Offline dirtymike

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #8 on: January 27, 2018, 05:10:05 AM »
DL Universal Style Speedometer for Harley-Davidson. Been using one for years, works great.https://kosonorthamerica.com

Offline yarddogg77

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #9 on: January 31, 2018, 06:41:19 PM »
Thanks for the feedback. I'm not able to check my forks for a notch right now cause it's in my friends shop. I will have to put a notch in my rotor. I included a link to the drive unit I bought in my second response. J&P cycles specifically mentions it's for custom bikes that had a transmission speed drive. It's should work. I'm gonna be ordering a new clock to match it too. So far so good, it should be here this week and I can find out if everything fit's this weekend. I'll get back on here and share part numbers too in case someone else has the same issues.
My shop has a grass floor and really high ceiling... Yard - Dogg

Offline yarddogg77

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #10 on: February 04, 2018, 08:53:24 PM »
Well crap, J&P cycles was 0 for 3 on this order. I finally got to check the fitment of the speedo drive today. It was very wrong. I have a dual disk front end which needs about a 5/8" spacer on the left side to be centered on the forks. That drive gear was probably meant for a single disk, which I'm assuming may have a more narrow hub assembly. With the speedo drive installed, my wheel was off centered by about 1/4" to the right side of the bike. The speedo cable they sent me had the wrong style to the speedo drive, using a cup style nut rather than a male threaded fitting. The rotor bolts they sent me were a tapered head not a sunken head like they advertised. Not impressed today. I ended up finding some uss 1/4" grade 8 washers which fit in the rotor hole recesses snugly, and the 5/16" bolts fit into those washers snuggly, so the rotors mounted great until I can source the right bolts. And the wheel is centered in the forks. I call it road worthy now, but without a speedo. Job done. Atleast it roles around my friends shop.
My shop has a grass floor and really high ceiling... Yard - Dogg

Offline yarddogg77

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #11 on: February 04, 2018, 09:00:55 PM »
Yarddogg77,

My 1990 FXSTC with wide fork and 21" wheel looks to have the identical sliders as yours, even has the bosses.  The part numbers in the 1990 Harley Parts book are

67120-84B  Drive Unit
676024-84A  Cable Assy.
67118-87  Drive Seal

If your rotor doesn't have a notch for the drive, perhaps you can add one with a file or drill.

Evo, Could you tell me if your bike has dual disks or single?
My shop has a grass floor and really high ceiling... Yard - Dogg

Offline 76shuvlinoff

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #12 on: February 05, 2018, 02:21:50 AM »
Over the years with my roving speedometer drive I had to be creative with spacers both front and rear.
Being defenseless does not make you more safe.

Offline Evo160K

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #13 on: February 06, 2018, 09:49:16 AM »
Yarddogg77,

My 1990 FXSTC with wide fork and 21" wheel looks to have the identical sliders as yours, even has the bosses.  The part numbers in the 1990 Harley Parts book are

67120-84B  Drive Unit
676024-84A  Cable Assy.
67118-87  Drive Seal

If your rotor doesn't have a notch for the drive, perhaps you can add one with a file or drill.

Evo, Could you tell me if your bike has dual disks or single?


Dual discs

Offline billbuilds

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #14 on: February 06, 2018, 02:22:23 PM »
       yarddogg,

      You may need a kit like this. It's marketed by V-Twin Manufacturing and I found this link to a dealer on the web. Figured I'd offer it up as food for thought. Bill  http://www.hognutz.com/36-0547/

Offline Evo160K

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #15 on: February 09, 2018, 08:13:43 PM »
Yarddogg77,
For what it's worth, the spacer on both sides of the hub had to be fabricated to get the wheel where I wanted it.

Offline billbuilds

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #16 on: February 10, 2018, 03:28:24 AM »
From an old Chrome Specialties catalog that I keep for reference purposes. The one that you bought is on the lower right.

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« Last Edit: February 17, 2018, 08:01:35 PM by FSG »

Offline yarddogg77

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #17 on: February 17, 2018, 07:52:48 PM »
Yeah, I know I've found right side speedo drives exactly like what I'm looking for in the past. I need one with a total width of 1/2" or a little more, on the right side for a 21" wheel. I'll buy a clock to match it. Should have looked for one in the first place.
My shop has a grass floor and really high ceiling... Yard - Dogg

Offline yarddogg77

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Re: 80-83 Forks, 21" Dual Disk, Speedo Gear Part # Help..
« Reply #18 on: February 17, 2018, 07:59:51 PM »
       yarddogg,

      You may need a kit like this. It's marketed by V-Twin Manufacturing and I found this link to a dealer on the web. Figured I'd offer it up as food for thought. Bill  http://www.hognutz.com/36-0547/


Hognutz is a good website, they describe their stuff and even provide measurements, I like that, but so far I haven't found one. There was one for an FLH, but those have a 16" front wheel. I'll look around a little more on there.
My shop has a grass floor and really high ceiling... Yard - Dogg