Would have loved to have a motor like that under my butt yesterday 
103 vs 107 vs 110 on Fatbob
Road Captain
Joined: Feb 2008
Posts: 571
Likes: 0
From: Colorado
I looked around but didn't see a thread like this:
I'm going to add some displacement to my 08 Fatbob and wanted a little positive steer. I understand that bigger = more power. The questions I have are:
Cost vs performance gain?
How much of the stock components can I keep?
Will the bottom end need to be done as well?
What all will need to be replaced?
Do the "kits" have everything I need?
It seems that a 107 is about as big as you can go on stock parts from what I've read and it's not that much more expensive than a 103. I'm leaning towards the 107...any ideas?
I'm going to add some displacement to my 08 Fatbob and wanted a little positive steer. I understand that bigger = more power. The questions I have are:
Cost vs performance gain?
How much of the stock components can I keep?
Will the bottom end need to be done as well?
What all will need to be replaced?
Do the "kits" have everything I need?
It seems that a 107 is about as big as you can go on stock parts from what I've read and it's not that much more expensive than a 103. I'm leaning towards the 107...any ideas?
I went with the Axtell 107 kit, opt for the Baiesley ProHeads, 10:1.
The kit comes with everything you need and I couldnt be happier.
129hp / 131Tq.
You can check them out at www.axtellsales.com. If you call, talk to Chas. They know thier stuff.
Road Captain
Joined: Nov 2008
Posts: 577
Likes: 4
Awful lot of ways to go. I spent most of my performance $$ on suspension and brakes, but still wanted more oomph.
I added the HD SE103 stage 2 kit, was very reasonable at a local dealer. Gas is kinda crappy in California so I stayed away from higher compression.
I am very pleased with the result (100 lbs torque) but you can always get more.
Once I started thinking about doing more, it seemed like 1) do the heads, then 2) maybe bigger throttle bodies, 3) stronger clutch, 4)$$$. I didn't want to spend over $2k total, and didn't want to try to do any of the work myself.
I added the HD SE103 stage 2 kit, was very reasonable at a local dealer. Gas is kinda crappy in California so I stayed away from higher compression.
I am very pleased with the result (100 lbs torque) but you can always get more.
Once I started thinking about doing more, it seemed like 1) do the heads, then 2) maybe bigger throttle bodies, 3) stronger clutch, 4)$$$. I didn't want to spend over $2k total, and didn't want to try to do any of the work myself.
Club Member
Joined: Feb 2008
Posts: 11,483
Likes: 39
From: Passaic County, NJ
Hd's 110 means boring the case. If you're going to get into that, why not just keep going? 113/117/121/124..... I'm sure taking a basic 110 and adding the right headwork and cams could get it runnin with the big dogs but to just slap the kit on with hd cams,heads you're not gonna see as good a bump in power than if you pieced it together with complimentary parts.
a basic 103 (jugs,pistons) is $600. A good cam $250+ Headwork to compliment the cams $500+. For about $1500-1700 you can have a rockin bike that won't be unreliable.
Obviously more power = less life expectancy. Many have said a 103 is a nice medium between power and reliability.
a basic 103 (jugs,pistons) is $600. A good cam $250+ Headwork to compliment the cams $500+. For about $1500-1700 you can have a rockin bike that won't be unreliable.
Obviously more power = less life expectancy. Many have said a 103 is a nice medium between power and reliability.
Thread Starter
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Tourer
Joined: Mar 2008
Posts: 382
Likes: 4
From: Pacific NW
Hey throttle jockey! How is the dad coming along with the new bike?
It seems like the best way to go is to have a powerful 103. The 107 puts you in danger of blowing the crank and that's an expensive mod to make.
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Grand HDF Member
Joined: May 2007
Posts: 3,870
Likes: 499
From: Alberta
HeadQuarters 0033 cams, heads and ignition
CP pistons at 10.5 - 1 comp
SE crank, 51CV, pressure plate and perfect fit pushrods
2" Cycle Shack 2-2 pipes at time of dyno
CP pistons at 10.5 - 1 comp
SE crank, 51CV, pressure plate and perfect fit pushrods
2" Cycle Shack 2-2 pipes at time of dyno
Road Warrior
Joined: May 2008
Posts: 1,380
Likes: 1
From: ,,
the 103 is the most bang for your buck, the 110 isn't very good due to having to meet EPA restrictions. They tend to have a lot of heat issues from the high displacement low compression set up. (So I'm told)
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