Transmission/primary questions
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3rd Gear
Joined: May 2021
Posts: 7
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From: South Jersey
Transmission/primary questions
I have recently inherited a project bike and after sorting thru everything I am left with a complete driveline - engine, primary, and 5speed transmission. What I would like to do with this is build a custom touring Trike. I would most likely start with a Kraft/Tech K18023 frame and then either go with a Frankenstein Trikes or a Mystery Designs trike kit.
So - the question revolves around the Primary and Transmission. I would prefer the more comfortable ride that is possible with a touring swing arm frame. However, the driveline I have is a low-mileage 1999 Evolution driveline for a Soft tail. Am I just able to acquire (trade or buy) a primarily and trans and still utilize the engine or is the engine case actually different? In other words, will a primary for a 1999 Ultra Classic (FLHT) or Road King (FLHR) work with the 1999 Evolution Engine that I have?
Looking to find this out before I put out for the frame! Worst case I will settle for a Soft Tail frame and use the entire driveline that I have.
Thanks!
So - the question revolves around the Primary and Transmission. I would prefer the more comfortable ride that is possible with a touring swing arm frame. However, the driveline I have is a low-mileage 1999 Evolution driveline for a Soft tail. Am I just able to acquire (trade or buy) a primarily and trans and still utilize the engine or is the engine case actually different? In other words, will a primary for a 1999 Ultra Classic (FLHT) or Road King (FLHR) work with the 1999 Evolution Engine that I have?
Looking to find this out before I put out for the frame! Worst case I will settle for a Soft Tail frame and use the entire driveline that I have.
Thanks!
Seasoned HDF Member
Joined: Sep 2008
Posts: 14,161
Likes: 11,252
From: San Diego, CA
I have recently inherited a project bike and after sorting thru everything I am left with a complete driveline - engine, primary, and 5speed transmission. What I would like to do with this is build a custom touring Trike. I would most likely start with a Kraft/Tech K18023 frame and then either go with a Frankenstein Trikes or a Mystery Designs trike kit.
So - the question revolves around the Primary and Transmission. I would prefer the more comfortable ride that is possible with a touring swing arm frame. However, the driveline I have is a low-mileage 1999 Evolution driveline for a Soft tail. Am I just able to acquire (trade or buy) a primarily and trans and still utilize the engine or is the engine case actually different? In other words, will a primary for a 1999 Ultra Classic (FLHT) or Road King (FLHR) work with the 1999 Evolution Engine that I have?
Looking to find this out before I put out for the frame! Worst case I will settle for a Soft Tail frame and use the entire driveline that I have.
Thanks!
So - the question revolves around the Primary and Transmission. I would prefer the more comfortable ride that is possible with a touring swing arm frame. However, the driveline I have is a low-mileage 1999 Evolution driveline for a Soft tail. Am I just able to acquire (trade or buy) a primarily and trans and still utilize the engine or is the engine case actually different? In other words, will a primary for a 1999 Ultra Classic (FLHT) or Road King (FLHR) work with the 1999 Evolution Engine that I have?
Looking to find this out before I put out for the frame! Worst case I will settle for a Soft Tail frame and use the entire driveline that I have.
Thanks!
To specifically answer your question.... No, a '99 touring drive train will not bolt up to a '99 softail (EVO) engine.. The reason is because in 1999, the Dyna and Touring models got the then new, twin cam 88" engines...
I don't know for certain, but believe there is also a difference between the EVO touring and the EVO softail engines, primaries, and transmissions... just like in the Twin Cam engine family...
It's been awhile since I've worked on my old '89 Heritage. I sold it in '93.. I also have never personally compared an EVO touring drive train to an EVO softail drive train.... But I don't believe they are compatible, and a quick check of the parts numbers suggest they are two different animals...
The engine cases for a '99 EVO softail are part #24571-93 and the engine cases for a '98 EVO touring are part #24569-95
The inner primary for a '99 EVO softail is part #60630-94B and the inner primary for a '98 EVO touring is part #60432-94
The transmission housing for a '99 EVO softail is part #34732-96 and the transmission housing for a '98 EVO touring is part #34740-94. Of course, the transmission of a touring bike also has the oil pan attached, while the softails use a remote oil tank...
Looks like you will need a softail EVO drive train to match up to the '99 EVO softail engine...
If I am wrong, I will be corrected shortly...
Last edited by hattitude; May 5, 2021 at 10:07 PM.
Thread Starter
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3rd Gear
Joined: May 2021
Posts: 7
Likes: 2
From: South Jersey
I have no personal experience with EVO engine swaps... but since no one else has answered yet, I'll give it a shot...
To specifically answer your question.... No, a '99 touring drive train will not bolt up to a '99 softail (EVO) engine.. The reason is because in 1999, the Dyna and Touring models got the then new, twin cam 88" engines...
I don't know for certain, but believe there is also a difference between the EVO touring and the EVO softail engines, primaries, and transmissions... just like in the Twin Cam engine family...
It's been awhile since I've worked on my old '89 Heritage. I sold it in '93.. I also have never personally compared an EVO touring drive train to an EVO softail drive train.... But I don't believe they are compatible, and a quick check of the parts numbers suggest they are two different animals...
The engine cases for a '99 EVO softail are part #24571-93 and the engine cases for a '98 EVO touring are part #24569-95
The inner primary for a '99 EVO softail is part #60630-94B and the inner primary for a '98 EVO touring is part #60432-94
The transmission housing for a '99 EVO softail is part #34732-96 and the transmission housing for a '98 EVO touring is part #34740-94. Of course, the transmission of a touring bike also has the oil pan attached, while the softails use a remote oil tank...
Looks like you will need a softail EVO drive train to match up to the '99 EVO softail engine...
If I am wrong, I will be corrected shortly...
To specifically answer your question.... No, a '99 touring drive train will not bolt up to a '99 softail (EVO) engine.. The reason is because in 1999, the Dyna and Touring models got the then new, twin cam 88" engines...
I don't know for certain, but believe there is also a difference between the EVO touring and the EVO softail engines, primaries, and transmissions... just like in the Twin Cam engine family...
It's been awhile since I've worked on my old '89 Heritage. I sold it in '93.. I also have never personally compared an EVO touring drive train to an EVO softail drive train.... But I don't believe they are compatible, and a quick check of the parts numbers suggest they are two different animals...
The engine cases for a '99 EVO softail are part #24571-93 and the engine cases for a '98 EVO touring are part #24569-95
The inner primary for a '99 EVO softail is part #60630-94B and the inner primary for a '98 EVO touring is part #60432-94
The transmission housing for a '99 EVO softail is part #34732-96 and the transmission housing for a '98 EVO touring is part #34740-94. Of course, the transmission of a touring bike also has the oil pan attached, while the softails use a remote oil tank...
Looks like you will need a softail EVO drive train to match up to the '99 EVO softail engine...
If I am wrong, I will be corrected shortly...
Keep the shiny side up!
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