Twin cam engine numbers decode

Reply Subscribe

Thread Tools

Search this Thread

Jul 10, 2024 | 05:28 PM

#31

hattitude

Seasoned HDF Member

Joined: Sep 2008

Posts: 14,156

Likes: 11,245

From: San Diego, CA

Quote:

Originally Posted by Red Good

Twin cam motor 1st 4 digits are KBN or M last one is an E . Any help with year and model ? Thanks guys .

KB = FLHX Street Glide

N = Twin Cam 103"

E = 2014

The last 5 digits should match the last 5 digits on the VIN of the 2014 FLHX Street Glide that engine was installed in at the factory...

Jul 10, 2024 | 11:32 PM

#32

Red Good

Stage IV

Joined: Jul 2017

Posts: 4

Likes: 0

From: Oklahoma

Thanks for that , is there a spot that they can be looked up ?

Jul 11, 2024 | 08:38 AM

#33

hattitude

Seasoned HDF Member

Joined: Sep 2008

Posts: 14,156

Likes: 11,245

From: San Diego, CA

Quote:

Originally Posted by Red Good

Thanks for that , is there a spot that they can be looked up ?

Any good VIN decoder has the info...

On 1981 and up bikes, the engine number (EIN) shares the same info as the Vehicle Identification Number (VIN) from the bike the factory installed it in....

The one exception is there is a special EIN digit to identify a crate engine, never installed in a bike. I don't have my notes nearby, so I can't share it at this time..

The VIN is 17 Digits, the EIN is a shorter version with only 10 digits...

Here is the breakdown for the EIN:

First two digits of the EIN are the same as the VIN model code. (VIN model code are digits #5 & #6)

Third digit of the EIN is the same as the VIN engine code. (VIN engine code is digit #7)

Fourth digit of the EIN is the same as the VIN year code. (VIN year code is digit #10)

The last 6 digits of the EIN will be numbers. They will match the last six numbers (production number) of the VIN on the bike it was installed into at the factory.

I hope that info helps.

PS- I just checked my notes. If the last six numbers of an EIN, start with the number "9".... That means the engine is an off-the-shelf engine, NOT associated with a motorcycle production number... or basically the engine was sold as a crate engine from the factory.

This info was provided to me by a fellow forum member when he had an EIN that started with a number "9" in the last six numbers. He called Harley customer service and they told him the above info.

Last edited by hattitude; Jul 11, 2024 at 09:00 AM.

Jul 11, 2024 | 09:14 AM

#34

Red Good

Stage IV

Joined: Jul 2017

Posts: 4

Likes: 0

From: Oklahoma

Thanks a bunch

Nov 15, 2024 | 03:59 PM

#35

Rjredd

Stage II

Joined: Nov 2024

Posts: 2

Likes: 0

From: Melbourne

Engine idenification

Hi guys,
I have a 08 road King with a unknown motor (long story and I've hit to many road blocks to get a straight answer), it is a Harley motor but not sure on the size or what model it has come out of and unable to find any online resource to work it out myself.
Engine number is GYME308527 and located in Australia if that makes any difference.

Nov 15, 2024 | 10:58 PM

#36

hattitude

Seasoned HDF Member

Joined: Sep 2008

Posts: 14,156

Likes: 11,245

From: San Diego, CA

Quote:

Originally Posted by Rjredd

Hi guys,
I have a 08 road King with a unknown motor (long story and I've hit to many road blocks to get a straight answer), it is a Harley motor but not sure on the size or what model it has come out of and unable to find any online resource to work it out myself.
Engine number is GYME308527 and located in Australia if that makes any difference.

GY = FXDF (Fat Bob)

M = Twin Cam 103"

E = 2014

308527 = the last six numbers of the VIN (production number) on the motorcycle the engine was installed in when it left the factory.

Your engine started life as a 103" Twin Cam from a 2014 Dyna Fat Bob. The production number (last 6 of the VIN) of the Fat Bob it came out of was 308527.

https://www.rideapart.com/reviews/25...at-bob-review/

Last edited by hattitude; Nov 15, 2024 at 11:00 PM.