1998 Road King EFI 80 EVO engine upgrade?

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Jul 14, 2021 | 12:42 PM

#11

willieonetime

Thread Starter

Novice

Joined: Jul 2021

Posts: 22

Likes: 2

From: Tennessee

2011 Harley Davidson Ultra Classic Touring OEM Engine 96CI EFI Motor 19261-11 would this engine fit a 1998 road king classic. Looking at getting something to work on on the bench and have ready if I need it.

Jul 14, 2021 | 01:22 PM

#12

Garageking

Road Captain

Joined: Aug 2020

Posts: 516

Likes: 119

From: Athens Ohio

Harley pn 61407-95A
i found that there were 2 listed in Ohio dealer data, one was false.
drove 2.5hrs to get it in cincy

i made the tool to install out of thin stock aluminum

May 26, 2024 | 02:08 PM

#13

LeftEyeLane

Stage IV

Joined: May 2024

Posts: 4

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From: MN

I have a 98 Road King EFI with the 1340cc. It says online that it's 82 cu in but everything I see if gor 80 cu in. Did they do both for that year or did I get bad info and i actually have an 80"?

May 26, 2024 | 02:30 PM

#14

FLHRinFL

Cruiser

Joined: May 2020

Posts: 231

Likes: 450

From: SW Florida

Quote:

Originally Posted by LeftEyeLane

I have a 98 Road King EFI with the 1340cc. It says online that it's 82 cu in but everything I see if gor 80 cu in. Did they do both for that year or did I get bad info and i actually have an 80"?

If you do the math for 3.5” bore and 4.25” stroke it equals 81.7 cubic inches. H-D however has always referred to it as 80 cubic inches.

May 27, 2024 | 08:13 AM

#15

LeftEyeLane

Stage IV

Joined: May 2024

Posts: 4

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From: MN

Quote:

Originally Posted by FLHRinFL

If you do the math for 3.5” bore and 4.25” stroke it equals 81.7 cubic inches. H-D however has always referred to it as 80 cubic inches.

Thank you so much for that! I can finally feel comfortable ordering a big bore kit. How do you get 81.7 from 3.5 and 4.25? What's the equation? I obviously need to do more research.

May 27, 2024 | 10:39 AM

#16

FLHRinFL

Cruiser

Joined: May 2020

Posts: 231

Likes: 450

From: SW Florida

Quote:

Originally Posted by LeftEyeLane

Thank you so much for that! I can finally feel comfortable ordering a big bore kit. How do you get 81.7 from 3.5 and 4.25? What's the equation? I obviously need to do more research.

First find the area of the bore using pi x radius squared (3.14 x 3.0625 = 9.61625). Then 9.61625 x 4.25 = 40.869 x 2 = 81.738.

May 29, 2024 | 01:49 AM

#17

Dano523

HDF Community Team

Joined: Jan 2020

Posts: 1,434

Likes: 800

From: Colorado

If still running the OEM fuel lines, ditch then and switch over to goodridge lines before the lines start falling apart from the inside out, and sending debris down line.
https://www.denniskirk.com/goodridge...prd/183090.sku

As for if you need to remove the fuel lines to pull the tank with goodridge lines at later date, leave the bunge threaded in parts with check valves above in the tank alone, and just pull the bottom C clips to pull the lines down and off the tank fittings.