103 to 107 worth it?

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Jul 9, 2013 | 06:36 AM

#41

BoonDock_Saint

Outstanding HDF Member

Joined: May 2013

Posts: 2,059

Likes: 4

From: Florida

Quote:

Originally Posted by Uncle Chester

If it was me the extra 4 inches would not be worth it, just ask my wife I offer her four inches all the time.

That's some funny $hit right there!

Jul 9, 2013 | 07:08 AM

#42

equandt

Road Warrior

Joined: Aug 2006

Posts: 1,575

Likes: 7

From: Wisconsin

Quote:

Originally Posted by 201048

http://www.fuelmotousa.com/site/107-inch-big-bore.html

I'm about to pull the trigger on this kit and have my Harley mechanic install it he wants about a grand for the complete job....

BEFORE I do anything, after the kit is installed what needs to be done to have the bike rideable and reliable like it is now?

A tune? Intake? I have Rinehart slip ons....if that helps LOL

I want a little more pep and some power the 103 is OK but for this price it seems to be worth the gains?

My FM107 is rock, solid reliable in my '10 Ultra. I've got a little under 10K miles on it now. Was it worth it? Hell yeah. FM did the install and tune. The bike has power everywhere. The secret is that the FM107 package is a complete package. The big bore, 10.25:1 compresion and TW-555 all work together to make a great running engine.

You'll want a stage 1 air cleaner, tuner and new head pipe match the engine work you are planning.

For comparisons sake, my '12 RGC has a complete stage 1 kit with Rinehart extreme true duals, HD heavy breather and PC-V. It's a nice running 103 with top shelf parts. However, there is no comparision...my Ultra / FM107 is stronger everywhere; alot stronger.

I've looked at it both ways as I plan the additional engine work for my '12 RGC. FM107 or stock 103 bottom with cam and heads. From everything I can tell, the FM107 gives you more tq and equal hp than a 103 with cam and FM heads for less money. I'm going to use the TW-222 cam as part of a FM107 build in the RGC just because I want something different and to see how much torque I can make.

Some guys are happy with a nice stage 1, some guys are happy with a cam swap. I'm really happy with the FM107 kit and I'd tell you it's worth it. If you took a poll of folks that had bought the FM107 kit and had it for a while, there won't be too many that say different.

Good luck.

Last edited by equandt; Jul 9, 2013 at 08:55 AM.

Jul 9, 2013 | 08:00 AM

#43

jus2anoyu

Outstanding HDF Member

Joined: Aug 2008

Posts: 2,090

Likes: 7

If all you do is add 4 ci then no its not worth the change. You will barely notice the difference. If you go in the engine and do other upgrades, then you might as well punch it to a 107. 103 to 107 alone isn't much

Jul 9, 2013 | 08:39 AM

#44

mgmmgm

Outstanding HDF Member

Joined: Feb 2007

Posts: 2,710

Likes: 6

From: Spokane, WA.

If I had the $$$, I would do a 107 FM kit with B heads, maybe use the "new" FM 107 heads they came out with.

Jul 9, 2013 | 12:25 PM

#45

Dozer40

Road Warrior

Joined: Jan 2013

Posts: 1,912

Likes: 328

From: Arizona

Quote:

Originally Posted by suban

Intake, 2:1 exhaust, cams, head work and a tune. That will wake her up more then just bolting on the 107 kit.

Jul 9, 2013 | 02:31 PM

#46

whiskyls1

Tourer

Joined: Jun 2010

Posts: 457

Likes: 0

Quote:

Originally Posted by 0ldhippie

If it is a '13 street glide I'd do a stage 4 kit and keep the warranty. If ya don't care about the warranty, putting some 10-1 pistons and 57h cams in your 103 would be good bang for the buck. Should brake 100hp and 110 tq pretty easy with proper tune and pipe. All ya really get with the FM kit is higher compression for bigger cams. The 4 cubes mean little but it's not a bad deal for a bolt in kit.

http://www.adventureharley.com/harle...nches-92500011

Jul 9, 2013 | 04:36 PM

#47

wormie

Novice

Joined: May 2012

Posts: 20

Likes: 0

From: Georgia

Orca - r&b racing

Well all has a little truth but if you want the best bang for your money contact R&B Racing and you can get up to and not limited to 350 + HP and still get 55 MPG . They don't call them KILLER WHALES for nothing . Either way enjoy the ride !

Jul 9, 2013 | 05:12 PM

#48

drf7728

Advanced

Joined: Nov 2006

Posts: 91

Likes: 0

From: North Dakota

I got 23000 on a stock bottom FM 107. Its worth it. Its reliable HP.

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Jul 9, 2013 | 06:01 PM

#49

Ben E

Road Captain

Joined: Dec 2010

Posts: 646

Likes: 5

love my build, but did the whole FM package and went from a 96. 10,000 miles on her and it's always big fun to ride. Not sure of your budget, but if you have the cash why not?

Jul 9, 2013 | 06:40 PM

#50

louisianaSVT2001

Road Master

Joined: Jan 2010

Posts: 821

Likes: 0

From: Evangeline Parish Louisiana

Going with my past experiences in engine work, a good set of heads, cams, intake and exhaust would be a better performer. Unless of course you already have the before mentioned mods. Good heads with cams can make a world of difference in performance, however quality head work is not cheap.