Twin Cam to M8 conversion

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Jan 15, 2024 | 01:56 PM

#11

Ohio HD

Road Master

Joined: Mar 2012

Posts: 1,014

Likes: 977

From: Ohio

I can't offer any advice, but I sure do applaud your efforts to do this.

Jan 15, 2024 | 11:13 PM

#12

btsom

Grand HDF Member

Joined: Jan 2012

Posts: 4,454

Likes: 2,840

From: Oklahoma

Is the transmission also for an M8? I would not have expected the M8 to bolt on to the twin cam transmission and have the primary case also just bolt on. If it is a new transmission I would GUESS that the tone wheel on the transmission output shaft has twice as many teeth compared to the old transmission. I am curious but obviously have no suggestions for fixing your problem.

Jan 17, 2024 | 11:28 AM

#13

Magnut1

Grand HDF Member

Joined: Aug 2014

Posts: 4,725

Likes: 1,787

From: Toledo ohio

From what I know about speedos is they marry to the BCM so if you used the BCM from the M8 with the TC speedo then there could be a problem. You may end up either seeing if you can use the speedo from the M* or get a new one and marry it to the M8 BCM

Jan 17, 2024 | 07:28 PM

#14

F150HD

Grand HDF Member

Joined: Mar 2011

Posts: 4,816

Likes: 1,320

From: Good roads, cold beer

Quote:

Originally Posted by Highway Handler

He had to remove the twin cam and install the M8.
Pretty hard to switch from using 2 cams to 1.
It would be a Frankenstein bike for sure.

sure, tho your post said "I converted my 2014 TC to a 2018 M8 ", to me that didn't imply 'replacement'. Either way, good luck.

Jan 17, 2024 | 07:58 PM

#15

Highway Handler

HDF Community Team

Joined: Jan 2022

Posts: 1,118

Likes: 857

From: B.C.

Quote:

Originally Posted by F150HD

sure, tho your post said "I converted my 2014 TC to a 2018 M8 ", to me that didn't imply 'replacement'. Either way, good luck.

Not me, I am not the OP.
I wouldn’t attempt such a swap. Others are more creative than I and can dream up all kinds of creations. I agree the word converting is a bit misleading.
I think he should have converted to a twin cam shovel. ha.

Jan 18, 2024 | 05:57 AM

#16

jake24lt

Stellar HDF Member

Joined: Jan 2017

Posts: 2,669

Likes: 2,069

From: Massachusetts

Quote:

Originally Posted by Magnut1

If you have a techno research or a Diag4Bike tool, you can clear the "Vinerr" message in the speedo. You wont need a new one.

Jan 18, 2024 | 08:57 AM

#17

NoRegerts

Seasoned HDF Member

Joined: Mar 2011

Posts: 16,982

Likes: 9,059

From: Texas Hill Country

I have heard of this being an issue with the speedo. They marry to the ECM or BCM (I'm not 100%). I do not know of a way to unmarry and remarry them. So, if I had two bikes, and wanted to swap the gauges between them, they'd both have errors. The only fix I have seen is to get new, unused, unmarried gauges. Again, this is based on research and seeing others, I have not done this myself.

As far as your swap, I commend you on this. I think this is so cool! Were the frame mounting points the same? If the trans the one that came on the M8? Would the primary fit if it's the TC trans? So cool!

Jan 18, 2024 | 10:08 AM

#18

Rollbar

Road Captain

Joined: Sep 2014

Posts: 555

Likes: 27

From: Palm Harbor, Florida

Quote:

Originally Posted by simplegreen36

the bike is a 2014 SG witha healthy TC

I replaced all electronics with the exception of the gauges, there was no cutting or spicing necessary, as the harness was intended for this drive train

Nice!
How do you like that lift table?