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Old 08-27-2004, 03:23 PM   #1 (permalink)
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speedo ratio

Hi fellas got a question about speedo ratio building a shovel "82" putting it on a 74 frame not sure of the year of the tranny other than a four speed box it has a 23 tooth speedo drive gear does that go to a 1:1 or 2:1 speedo I think its a 1:1 but would like some other opinions...Thanks Jim
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Old 08-27-2004, 05:43 PM   #2 (permalink)
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Quote:
Originally Posted by jfoster5150
Hi fellas got a question about speedo ratio building a shovel "82" putting it on a 74 frame not sure of the year of the tranny other than a four speed box it has a 23 tooth speedo drive gear does that go to a 1:1 or 2:1 speedo I think its a 1:1 but would like some other opinions...Thanks Jim
If you're talking about driving the speedo with the tranny then I don't know the answer. On both of the shovels I've owned, the speedo was driven by a gear on the front axle. I believe this is a 2:1 ratio on a 19in wheel.
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Old 08-27-2004, 06:25 PM   #3 (permalink)
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Speedo info

Quote:
Originally Posted by jfoster5150
Hi fellas got a question about speedo ratio building a shovel "82" putting it on a 74 frame not sure of the year of the tranny other than a four speed box it has a 23 tooth speedo drive gear does that go to a 1:1 or 2:1 speedo I think its a 1:1 but would like some other opinions...Thanks Jim
=================================
Miles T.G. is correct regarding the front wheel driven speedometers with a 19" wheel. That's what I have on my 1982 FXS and the speedometer is a 2:1. This is marked on the back of the speedometer, near the cable thread. Usually this will be a 5/8-18 U.S. thread.

I took a look in my CCI catalog, section 16 where they keep the tin parts and speedometers and such. They state the following:

2:1 Ratio Speedometers: Fit FL models with transmission-driven speedometer drives from 1947 through 1967 and Sportster, FX and FXR models with front wheel speedometer drives from 1973 through 1990 except softail and 4 speed FXWG models. (5/8-18 nut on cable)

1:1 Ratio Speedometers: Fit 4 speed FL and FX models with transmission-driven speedometers from 1968 through 1983/ (5/8-18 nut on cable)

2240:60 Ratio Speedometers: Fit all softail and 4 speed FXWG models from 1984 through 1990 and 4 speed FL models with front wheel speedometer drives from 1981 through 1984. (Requires speedometer cable with 12mm nut)

So, it looks like you would use 2:1 for an early 4 speed and 1:1 for a late 4 speed.

Where it really gets strange is CCI only shows one transmission drive gear unit and that has a 23 tooth gear and it's listed for all of the transmission-driven models I mentioned above. That's likey because the gears inside that drive the outpout gear are different sizes for the different years mentioned.

My take on it would be that the 2:1 is most common and it would probably be the most likely candidate. Hope it works for you.

Good luck.
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Old 08-27-2004, 11:15 PM   #4 (permalink)
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Quote:
Originally Posted by newultraclassic
=================================
Miles T.G. is correct regarding the front wheel driven speedometers with a 19" wheel. That's what I have on my 1982 FXS and the speedometer is a 2:1. This is marked on the back of the speedometer, near the cable thread. Usually this will be a 5/8-18 U.S. thread.

I took a look in my CCI catalog, section 16 where they keep the tin parts and speedometers and such. They state the following:

2:1 Ratio Speedometers: Fit FL models with transmission-driven speedometer drives from 1947 through 1967 and Sportster, FX and FXR models with front wheel speedometer drives from 1973 through 1990 except softail and 4 speed FXWG models. (5/8-18 nut on cable)

1:1 Ratio Speedometers: Fit 4 speed FL and FX models with transmission-driven speedometers from 1968 through 1983/ (5/8-18 nut on cable)

2240:60 Ratio Speedometers: Fit all softail and 4 speed FXWG models from 1984 through 1990 and 4 speed FL models with front wheel speedometer drives from 1981 through 1984. (Requires speedometer cable with 12mm nut)

So, it looks like you would use 2:1 for an early 4 speed and 1:1 for a late 4 speed.

Where it really gets strange is CCI only shows one transmission drive gear unit and that has a 23 tooth gear and it's listed for all of the transmission-driven models I mentioned above. That's likey because the gears inside that drive the outpout gear are different sizes for the different years mentioned.

My take on it would be that the 2:1 is most common and it would probably be the most likely candidate. Hope it works for you.

Good luck.
Thanks for the replys Miles To Go and Newultraclassic the catalog reference got me to looking in Jireh and I found some of the same references 2:1 for years 47-67 and years 68 & later it was 1:1 and the same thing for the speddo drive gear 11 tooth for years 41-early 61 and 23 tooth for 69-80FL & FLH 71,72 FX and 80-83 FXWG but so Ill be doin some more research but I sure do appreciate the replies guys Thanks Jim
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