Engine/frame compatibility

Reply Subscribe

Thread Tools

Search this Thread

Nov 4, 2018 | 07:27 PM

crazyape

Thread Starter

1st Gear

Joined: Oct 2015

Posts: 5

Likes: 0

From: Pratt Kansas

Engine/frame compatibility

I own a 2004Softail Standard FI (FXSTSI). I was wondering if It would be possible to swap out my twin cam 88 and 5 speed for a newer 103 and 6 speed? What about the swing arm and wheel set up?

Nov 4, 2018 | 09:52 PM

OldEnuf2NoBtr

Seasoned HDF Member

Joined: Dec 2009

Posts: 9,165

Likes: 1,910

From: Doghouse... mostly

It's going to take a lot of engineering and modifying to accomplish. Not a direct bolt in swap.

Nov 5, 2018 | 12:14 PM

nevil

Seasoned HDF Member

Joined: Jul 2008

Posts: 9,282

Likes: 1,139

From: southeast PA

Why not just build your 88? A lot less money and with more power you can change your final drive ratio so the 5 speed works better.

Nov 5, 2018 | 03:54 PM

grbrown

Club Member

Joined: Jun 2007

Posts: 45,429

Likes: 2,898

From: Bedford UK

Quote:

Originally Posted by nevil

Why not just build your 88? A lot less money and with more power you can change your final drive ratio so the 5 speed works better.

And there are 6-speed conversion kits available.

Nov 6, 2018 | 10:46 PM

crazyape

Thread Starter

1st Gear

Joined: Oct 2015

Posts: 5

Likes: 0

From: Pratt Kansas

Thanks for the responses. I have no interest in cutting up my frame so the 103 will be ruled out. I will be looking into the options for my 88.

Nov 7, 2018 | 04:16 AM

grbrown

Club Member

Joined: Jun 2007

Posts: 45,429

Likes: 2,898

From: Bedford UK

Quote:

Originally Posted by crazyape

Thanks for the responses. I have no interest in cutting up my frame so the 103 will be ruled out. I will be looking into the options for my 88.

We have HDF sponsors who can help you, including Hillside Cycles and Fuel Moto, both of them with various tuning packages. Also S&S offer their T111 replacement engine, as well as a 124" and, if they are still not quite enough, a 143"! Plenty of choice available, of proven upgrades.

Nov 8, 2018 | 10:28 AM

Max Headflow

Seasoned HDF Member

Joined: Dec 2005

Posts: 19,944

Likes: 8,038

From: poway

I don't know about softails but suspect that the swap works if you use motor/tranny/primary. You can swap a 07 up bagger motor/tranny/primary into a 06-earlier bagger as long as you keep the motor/tranny/primary together.