FM 107" vs. HD Stg 4 kit - Road Glide Forums
Engine Related Engine Builds and more for Road Glides

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 12 (permalink) Old 08-04-2014, 10:05 PM Thread Starter
Hangaround
 
Brianu1's Avatar
 
Join Date: Jul 2013
Location: St. Paul, MN
Posts: 143
Garage
FM 107" vs. HD Stg 4 kit

I'm going to do some motor work this winter and can't decide if I should do the Fuel moto 107" big bore with CNC heads or the HD stage 4 kit. What are the pros and cons of each? It looks like they will be about equal cost to install. I'm in MN so WI isn't an issue getting my bike to FM. Looks like the FM will give just a little more power. Interesting the Hd kit has larger throttle body, but the FM doesn't. Also, I think the HD costs for dyno would be more. FM install costs include dyno tune.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
FLTRX, Black Edge Cut Blade wheels & rotors, RSD Seat, TW-777, V&H Power Duals w/ CFR's, Daymakers, SE A/C, PV tuner, Soundz Customz LV-4 audio, Klockwerks Flare 12" smoke, CD LED's, Progressive shocks, & lots of others...
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Brianu1 is offline  
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old 08-04-2014, 10:15 PM
Grey beard
 
pat123's Avatar
 
Join Date: Sep 2012
Location: Canton,Georgia
Posts: 1,066
FM 107 hands down. More power/torque than the HD stage 4 any day. One of the best customer service in the business. Great parts and great people.
pat123 is offline  
post #3 of 12 (permalink) Old 08-04-2014, 10:16 PM
Life Member
 
Hullhorr's Avatar
 
Join Date: Feb 2011
Location: Mt. Airy, MD
Posts: 6,081
Personally, I would do the FM kit. I'm just not that impressed with the HD performance upgrades.

2009 FLTR MOP
"A Goverment should fear it's people not vice versa"
Hullhorr is offline  
 
post #4 of 12 (permalink) Old 08-04-2014, 10:18 PM
Grey beard
 
sfcusaret2004's Avatar
 
Join Date: Oct 2013
Location: michigan
Posts: 1,178
1st, I know almost nothing about either one of these builds. However, If your bike is still covered by the MoCo or and ESP warranty, I'm betting the HD Stage IV will also be covered in case of failure whereas the FM will not. If the FM does warranty their build it may still invalidate the remainder of the ESP on your bike. Better check both company's for their guarantee's and read the fine print! If this isn't an issue for you then go with FM. It seems very few people on this blog have many good things to say about the MoCo and a few have paid for a stage IV kit only to find out the jugs weren't really replaced, or the head work wasn't really done or the lifter pins were left out ect. Bottom line Caveat Emptor! Buyer beware. Good luck and keep us posted regardless of what route you take.

Life is too short to put up with stupidity. Strive every day to educate someone, including yourself!
sfcusaret2004 is offline  
post #5 of 12 (permalink) Old 08-04-2014, 11:32 PM
Prospect
 
kouack's Avatar
 
Join Date: Aug 2012
Location: Montréal, Canada.
Posts: 211
Garage
Quote:
Originally Posted by sfcusaret2004 View Post
1st, I know almost nothing about either one of these builds. However, If your bike is still covered by the MoCo or and ESP warranty, I'm betting the HD Stage IV will also be covered in case of failure whereas the FM will not. If the FM does warranty their build it may still invalidate the remainder of the ESP on your bike. Better check both company's for their guarantee's and read the fine print! If this isn't an issue for you then go with FM. It seems very few people on this blog have many good things to say about the MoCo and a few have paid for a stage IV kit only to find out the jugs weren't really replaced, or the head work wasn't really done or the lifter pins were left out ect. Bottom line Caveat Emptor! Buyer beware. Good luck and keep us posted regardless of what route you take.
The ''warranty covered stage 4'' which is not the race kit will not pull much more than an after market camshaft alone, i do not see the point on spending that kind of money on a moco kit my 2 cent. For the warranty no matter the route (performance) you take the MOCO will not stand for the warranty so who care, unless you are welling to spend alot of $ for little performance at that point a S&S 124 will be cheaper and way more reliable WITH A WARRANTY. If you are afraid to loose your warranty you should leave it stock and get a vglide at that point ;-).
kouack is offline  
post #6 of 12 (permalink) Old 08-05-2014, 05:07 AM
Prospect
 
equandt's Avatar
 
Join Date: Jun 2012
Posts: 210
The HD stage 4 kit isn't even in the same ball park as the FM107 kits. The FM107s make so much more torque across the board its not even funny.

Do the FM107. You'll get premium aftermarket parts and a great tune.

I've had my FM107 for three years and 15,000 miles. It runs perfectly.

Good luck.

2012 FLTRX
2010 FLHTCU
equandt is offline  
post #7 of 12 (permalink) Old 08-05-2014, 07:49 AM
Life Member
 
Deadstroke's Avatar
 
Join Date: Jan 2013
Location: Wilmington, DE
Posts: 1,546
Stay away from the Harley kits, You will get more performance from FM or Hillsides kits hands down. On the comment with 124 that is a much larger expense. What you have to figure out is what is important.. Harley will not warranty a race motor and thats what a stage 4 kit is..

It is best to figure out where you want to be at horsepower and torque at, it is better to do this once and be done..
Deadstroke is offline  
post #8 of 12 (permalink) Old 08-05-2014, 08:20 AM
Member
 
Join Date: Apr 2011
Location: Portsmouth, NH
Posts: 305
If i was going to do it all over again i would go aftermarket. I bought the Stage IV race only application and had it installed before taking posession of the bike. I gave up my warranty on day one.

I havent had any reliability issues with the kit, the bike is plenty fast and you can see my 1/4 mile times in my signature, that was before the Barnett clutch, i think i can pull better ETs than that now with some more seat time and the new clutch.

The cam may be a bit long for certain people's riding styles but in my opinion thats just a preferance. The bike likes to be ridden over 3000 rpm to have any real scoot when you whack the throttle.

Again my choice would to be aftermarket, the harley kit is noisy in the valvetrain and I'm sure the SE heads dont flow as well as a set that have been properly re-worked.

Part of the reason for having HD put that kit on when i bought the bike is that i rolled it all into the financing a brand new bike. In retrospect i would have bought a used bike with a high milage motor and pulled it for a big inch motor and done the swap myself.

2011 RG Custom, Screaming Eagle Stage IV (260 Cam), Barnett Scorpion clutch, Hayden M6, Baker DD7, V&H Throttlepak, V&H Power Duals w/Hi-Output Slipons
115.4 ft-lb & 122.7hp : 1/4 Mile 12.542 @ 105.99 w/stock clutch and transmission
gbourdon is offline  
post #9 of 12 (permalink) Old 08-05-2014, 08:45 AM
Administrator
 
dbell66253's Avatar
 
Join Date: Feb 2011
Location: South Florida
Posts: 12,281
Garage
I'm waiting for Ironmark to chime in on this one......... but I agree with most of the above, go after market.

Sent from Motorcycle.com Free App

2010 FLTRX With Plenty of extras, goes by the name "Hardeshia"
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Also not pictured 2016 FLTRXS and 2017 FLTRXS, you never can have too many SHARKS......
dbell66253 is offline  
post #10 of 12 (permalink) Old 08-05-2014, 10:08 AM
Life Member
 
neverdone's Avatar
 
Join Date: May 2013
Location: Marengo Ohio
Posts: 1,517
I have to agree with everyone else. I had the stage 4 installed last winter. I asked about the warrenty. My dealer said they would stand behind it. The bike definitely runs better. But I'm going to be looking about redoing it in another year.

Sent from Motorcycle.com Free App
neverdone is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Road Glide Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
MicroTuner vs PC5 vs PV? Help needed from you FM gurus. beatlesfab4fan ECM/Fuel Management systems 3 08-22-2017 06:41 AM
2011 RG FM 107 Build 22 Phantom Dyno Results 6 10-05-2015 06:33 AM
3 minute engine build; FM 107 time lapse video fuelmoto Fuel Moto 2 02-06-2015 09:39 AM
FM 107/woods tw777 initial thoughts. eldridgetom Engine Related 10 02-22-2014 08:55 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome