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Old 01-02-2013, 12:21 PM   #1
ML WYDELL OP
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Joined: Apr 2009
Location: Looking for fuel
Oddometer: 476
Transmission compatibility

What is the difference between the R80 G/S and non-G/S transmissions? Are they interchangable?

Thanks.
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Old 01-02-2013, 12:40 PM   #2
bikerfish
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depends on what year tranny you want to swap in it, can't remember what years you can switch. the only difference I know of in the range of trannys that will fit, is the G/S has a kickstarter.
I've swapped trannies in mine when my original needed rebuilt, putting a loaner in so I could still ride.
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Old 01-02-2013, 02:58 PM   #3
Beater
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Anything 81 to 95 will 'work' ... and are interchangable. There are some subtle differences (like the kick starter) ... but they all work.

All of the 70 - 80 transmissions are interchangable too ... even those 4 speed (with kick) trannys on a 77 RS. Kind of fun ... but have you ever tried kicking over a 1000cc high compression engine?

It hurts, and God help your knee.
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Old 01-02-2013, 03:56 PM   #4
disston
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There is a difference in the output shaft seal if the trans fits a dry drive shaft bike, i.e. Para Lever, I think. You can change the seal to suit the drive shaft, if you need to.

All Airheads pre 1981 are long input trannies, whether 4 or 5 speed. All Airheads 1981 and after are short input shafts. There are a number of other changes that accompany the input change so it's best to just stick with what you got. Any GS or G/S bike will automatically be a long input won't it? Did they not start until 1981 or after?

EDIT; I mean G/S and GS will be a short input!!! (I typed wrong)
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disston screwed with this post 01-02-2013 at 05:07 PM
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Old 01-04-2013, 09:55 AM   #5
ML WYDELL OP
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Joined: Apr 2009
Location: Looking for fuel
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Thanks for all the replies / education. Friend of mine may have to rebuild his tranny, which is overseas and parts procurement is difficult so I was looking into alternatives.
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Old 01-04-2013, 12:44 PM   #6
Padmei
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I swapped over a 81 r65 to a 91 GS & the only difference was the gear lever - swapped them over & good to go.
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