Transmission gear / speedometer

[George Greer]

I have acquired a Km/h speedometer and have identified it as a 80-81 FXWG 1 to 1 drive.

Also, I have been collecting parts for a spare transmission, and want to build the transmission with keeping in mind to build it with a transmission driven speedometer.

My question is concerning the drive. And the gear.

Am I correct with the following parts to be able to make this doable?

23 tooth Drive, Part number 67130-69

7 tooth drive gear, Part number 35635-69

If this gear combo works, all I have to do is press off the old drive gear and install the replacement...(right??).

In the photo of the gears, I have the one on the LEFT, it was already on the cluster, and the one on the RIGHT is the one I need.

Thanks for any further info.

George

[Mongrel505558]

The FX had a front wheel driven speedometer, but if it's 1:1 then I suppose any 1:1 drive/driven gears will work, as long as the speedometer accepts the cable that goes with what you decide to run. Stay away from the nylon gears. There is a list of gear combinations and part numbers available on the forum. Look in the links below or the KB. Not long ago I pressed a dive gear onto an FX countershaft cluster. It had a bare journal (not sure what to call it) where the gear goes.

[George Greer]

I do have a front wheel drive on the bike now, but it is 2 to 1.

As I understand, FXWG front drive is on the right, the front end I am using has the drive on the left.

I have been using the K-base, reading old post’s and came across the photo of the gears, and did see the various combinations.

I guess basically I am just looking for a conformation on what I read.


George

PS, Credit for the photo is due to forum member 1950Panhead thanks for posting it.

[Mongrel505558]

Whatever the speedometer ratio, 1:1 or 2:1, my take is it shouldn't matter what kind of hardware is downstream of the instrument, as long as it spins the cable at the same speed or half-speed as the speedometer is calibrated for. It just becomes a matter of attachment.

[1950Panhead]

George,
The 69 gears work with any 1000 rpm speedo

Late 1969 thru 1980:
7-tooth drive gear #35635-69 (orange stripe)
23-tooth drive unit #67130-69 (3.28, 1000 rpm)

[George Greer]

George,
The 69 gears work with any 1000 rpm speedo

Late 1969 thru 1980:
7-tooth drive gear #35635-69 (orange stripe)
23-tooth drive unit #67130-69 (3.28, 1000 rpm)

Thank you for the reply, for what I need to make it work properly.

I am looking for the parts now.

George

[Panacea]

Hi George! Are you retiring in Germany?

[George Greer]

Hi George! Are you retiring in Germany?

Yes sir, we’re staying put.

Daughters situation changed, and she told us not to sell the house and move to Portland, rather she was leaving the utter chaos and crap there ( drugs, robbery, murder, general lawlessness), and she and the granddaughter packed up everything including the motorcycle and all the parts and moved here to Germany.

George

[1950Panhead]

rather she was leaving the utter chaos and crap there ( drugs, robbery, murder, general lawlessness)

Portland used to be a nice city ...

George,
Do you have permission to live in Germany ?

[George Greer]

rather she was leaving the utter chaos and crap there ( drugs, robbery, murder, general lawlessness)

Portland used to be a nice city ...

George,
Do you have permission to live in Germany ?

Yes sir, I do have a permanent immigration status.

Wife and I have been together 28 years, built our house and after she retired from Bank of America, and I retired from working on Army helicopters, with the daughter moving back to Germany. It is best for all involved.

If I returned to the US, I would have to start from scratch.

I do have my sisters still living in Smyrna Georgia, brother is in Calhoun, and my daughter (previous marriage) she lives in Acworth.
George

[George Greer]

Update,

I have finally collected the parts for the transmission build.

I have a question about the drive gear being tack welded in place.

I have a three thousands press fit on the drive gear, and I am wondering if tack welding is really necessary.

I have a spring loaded punch and I tried to just stake it in places….. no go the drive gear and the cluster is hard and I barely made a dent.

Everything in the transmission is new Andrews, (except for the bearings and seals), and I have one of Rays spacers.

Also, I have a problem getting a welder that is capable of tack welding it.

Suggestions?

Thanks, George

PS, I will start a new thread and make photos of the transmission build

[RooDog]

I had mine tack welded in 4 places so many years ago that I don't remember if I MIG welded it, or farmed it out. It ain't rocketry, a TIG, or MIG's heat is so concentrated that no harm is done to the materials' hardness. If a welder says can't do the work, then he needs to turn in his union card....
....RooDog....

[doc9339]

Been thru this: As far as the drive gear on the axle, right or left doesnt ,matter, as long as its the correct 1:1 ratio. All you will need to do is finagle an axle spacer or two. The harder parts is the connetor beteen the cable and speedo. On HDs there were two or three dif sizes and pitches on the collars that screwed the cable housing to the speedo. Take a look at the JP catalog or V Twin. There are conversions that will let you run pretty much any speedo to any cable housings

[RooDog]

I've been using Sportster and FX front wheel speedos for years and that have all been 2:1. Do confirm the ratios before buying and installing parts....
....RooDog....

[nifty]

George
My 2c
Press fit is fine, .003" is plenty, critical is absolutely square to shaft, any cock and you will kill the speedo drive gears.
Check for consistent backlash and freedom from tight spots while rotating countershaft gear through 3+ revolutions.
Weld only really necessary when drive gear loose, some AM countershaft gears undersize, some AM drive gears oversize
The 7-23 fine teeth gears are correct for late so-called 1:1 head, but if you already have matching 4-13 coarse teeth gears they will be ok with same head.
Trans driven speedo accuracy goes out the window if you run a trans sprocket bigger than 22T.

From memory the first FXWG used trans driven speedo

Whoever long ago started talking 1:1 and 2:1 speedometer ratios has been confusing people ever since.
1,000 revs per mile and 2,000 revs per mile are the real FL type speedo head internal gearing specs.
1000 revs per mile obviously is a slower cable speed, which puts less wear and tear on cable & speedo head.
No H-D speedo drive actually has 1:1 or 2:1 ratio gear reduction, the front drives are just sometimes marked that way to try to get people to use the right one for particular application.

Nifty