Engine Mechanical Topics Discussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.

06 FXDBI Big Bore Kit

Thread Tools
 
Search this Thread
 
Old Dec 26, 2016 | 02:44 PM
  #1  
Nait402's Avatar
Nait402
Thread Starter
|
Novice
Joined: Jun 2016
Posts: 15
Likes: 0
From: Omaha, NE
Default 06 FXDBI Big Bore Kit

I have an 06 FXDBI with an 88in motor that I'm looking to upgrade. I was hoping in the end to have a 103in, but it seems most the kits for my year stop around 96in. Can someone point me in the right direction or drop some knowledge on if this is possible and how to go about it?

Thanks for any info. Nait.
 
Reply
Old Dec 26, 2016 | 04:14 PM
  #2  
prodrag1320's Avatar
prodrag1320
Banned
Joined: Sep 2009
Posts: 3,569
Likes: 624
From: deland,florida
Default

You can get a 98" kit,
 
Reply
Old Dec 26, 2016 | 04:33 PM
  #3  
Max Headflow's Avatar
Max Headflow
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,925
Likes: 8,027
From: poway
Default

As stated 98 ci is about the max without boring the cases.. SnS supposedly has a 100 ci kit out tho.. The only way you get to 103/107 is to bore the cases (104/107 ) or stroke the motor to 4 3/8 which requires replacing the crank.
 
Reply
Old Dec 27, 2016 | 05:39 AM
  #4  
Hillsidecycle.com's Avatar
Hillsidecycle.com
Sponsor
Joined: Dec 2007
Posts: 12,084
Likes: 829
Default

Originally Posted by Nait402
I have an 06 FXDBI with an 88in motor that I'm looking to upgrade. I was hoping in the end to have a 103in, but it seems most the kits for my year stop around 96in. Can someone point me in the right direction or drop some knowledge on if this is possible and how to go about it?

Thanks for any info. Nait.
Largest you can go w/o removing the cases from the chassis is 98".
A 98" Dyna build, if wanted, can push off some VERY good power.
We have several combinations for those.
Scott
 
Reply
Old Dec 27, 2016 | 01:21 PM
  #5  
roussfam's Avatar
roussfam
Seasoned HDF Member
15 Year Member
Top Answer: 1
Top Answer: 3
Top Answer: 5
Joined: Jan 2009
Posts: 12,689
Likes: 8,295
From: Ottawa, Ontario
Default

Big Bore kit from HD is 95"

So bored 88 is 95
Stroked 88 is 96
Bored and stroked 88 is 103

Larger displacement available from aftermarket...98, 107 etc

 
Reply
Old Dec 27, 2016 | 03:55 PM
  #6  
djl's Avatar
djl
HDF Community Team
Veteran: Army
15 Year Member
Photogenic
Liked
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
Community Team
Default

Originally Posted by roussfam
Larger displacement available from aftermarket...98, 107 etc.
Without case boring..........
 
Reply
Old Jan 1, 2017 | 09:19 PM
  #7  
Lunchboxx's Avatar
Lunchboxx
Road Master
Veteran: Navy
10 Year Member
Liked
Community Favorite
Joined: Feb 2015
Posts: 1,040
Likes: 203
From: Susanville CA
Default

S&S makes a 100" kit that they say will bolt on. Fuel Moto has a 98" kit that looks nice and has everything you need except heads(Cams and new style plate with tensioners and oild pump I think), I have read that Hillside has a kit with heads cylinders and pistons, but have not verified that myself. I have an 01 road glide and am trying to decide which one I want to do. The MM EFI is my downfall, so I think I am going to convert to carb. Mikun i42 or HD SE 44MM I have not decided yet.
 
Reply
Old Jan 1, 2017 | 11:19 PM
  #8  
Max Headflow's Avatar
Max Headflow
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,925
Likes: 8,027
From: poway
Default

Originally Posted by Lunchboxx
S&S makes a 100" kit that they say will bolt on. Fuel Moto has a 98" kit that looks nice and has everything you need except heads(Cams and new style plate with tensioners and oild pump I think), I have read that Hillside has a kit with heads cylinders and pistons, but have not verified that myself. I have an 01 road glide and am trying to decide which one I want to do. The MM EFI is my downfall, so I think I am going to convert to carb. Mikun i42 or HD SE 44MM I have not decided yet.
Carb is a good way to go.. Both of those carbs are good at 100 ci you could even go to a 45 mik.. The CV44 won't have the flow of the HSRs but it will deliver excellent overall performance without the rattle or sensitivity to popping on decel depending on the exhaust and may a little better milage.
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-1

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-2

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-4

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-5

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-6

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-7

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-8

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-9

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
Old Jan 2, 2017 | 04:07 AM
  #9  
Hillsidecycle.com's Avatar
Hillsidecycle.com
Sponsor
Joined: Dec 2007
Posts: 12,084
Likes: 829
Default

Originally Posted by Lunchboxx
S&S makes a 100" kit that they say will bolt on. Fuel Moto has a 98" kit that looks nice and has everything you need except heads(Cams and new style plate with tensioners and oild pump I think), I have read that Hillside has a kit with heads cylinders and pistons, but have not verified that myself. I have an 01 road glide and am trying to decide which one I want to do. The MM EFI is my downfall, so I think I am going to convert to carb. Mikun i42 or HD SE 44MM I have not decided yet.

We have semi-completed cores on the shelf in prep, for exchange.
Happy to help.
Scott
 
Reply
Old Jan 2, 2017 | 11:08 AM
  #10  
djl's Avatar
djl
HDF Community Team
Veteran: Army
15 Year Member
Photogenic
Liked
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
Community Team
Default

Originally Posted by Lunchboxx
Mikun i42 or HD SE 44MM I have not decided yet.
My all bore 107" CV SE44mm carbed '02 FLHT makes 124TQ/110HP and gets, on average, 38mpg. If I do a controlled 100 mile run on the interstate and do not exceed 70mph, I can squeeze out 40mpg but........................... The CV carb was not difficult to tune; took about 3 pulls on the dyno to dial it in.
 
Reply



All times are GMT -5. The time now is 04:42 AM.

story-0
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-1
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-2
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-3
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-4
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-5
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-6
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-7
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-8
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-9
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE