Big bore worth the $$?
Road Warrior
Joined: Aug 2006
Posts: 1,575
Likes: 7
From: Wisconsin
I'm trying to decide whether or not to do the fuelmoto 107 or just do head work and cams to my 96?
My bike dynoed 82hp, and 92 tq with the heavy breather and a super trap 2 into 1 will there be enough power increase for the extra money? If so how much power diifernce would there be?
Andi have searched and searched and got mixed reviews.. seen some 96s making as much power as 103 and 107s thanks for the help.
My bike dynoed 82hp, and 92 tq with the heavy breather and a super trap 2 into 1 will there be enough power increase for the extra money? If so how much power diifernce would there be?
Andi have searched and searched and got mixed reviews.. seen some 96s making as much power as 103 and 107s thanks for the help.
BTW - I my '02 RKC was a 95" big bore twin cam, with a S&S 510G cam and stage 2 heads. It was a GREAT running bike. It dynoed at 91 hp / 97 tq. The FM107 kit in my Ultra would blow it away in any performance test; dyno charts, fuel milage, driveability, 50-70 mph...you get the idea.
Drop the coin and get the FM107 kit. You won't be disappointed.
Outstanding HDF Member
Joined: Feb 2007
Posts: 2,710
Likes: 6
From: Spokane, WA.
Se255
I would go with TW222 cams in that new 103, broader range than 255 and the torque and hp # are better. Check Fuelmoto site. Just my $0.02
Tourer
Joined: Aug 2009
Posts: 368
Likes: 22
From: southwest Iowa
I researched and flip flopped for about a year before pulling the trigger on my 107. After I did it I can't imagine not doing it, it is that good. Totally transformed the bike. It dynoed by Fuel Moto at 112HP/122TQ and I'm running stock headers with Monster Ovals. Not to mention it was 100 F the day it was dynoed. Just look at the torque curve, you couldn't ask for more.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,897
From: Bedford UK
Any engine work is improved by increasing compression. Swapping stock cylinders/pistons for bigger ones gains a few cubes, while also increasing compression. Well worth doing!
jjkrueg's torque curve is great and demonstrates the benefit of a finely balanced set of components.
jjkrueg's torque curve is great and demonstrates the benefit of a finely balanced set of components.
Last edited by grbrown; Sep 22, 2012 at 09:14 AM. Reason: Added para.
Club Member
Joined: Sep 2010
Posts: 52
Likes: 0
From: Illinois
It was worth it for me, and I would do it again.
I have not really posted about my experience with the upgrade until now because I wanted to get some miles on the bike. Now that I have ridden since February I feel I have enough experience with the build to comment.
I have about 6,000 miles on the motor since the upgrade, and I have no problems.
-more power throughout
-very smooth throttle response with no decel popping. Their dyno tune seems to be spot on.
-lots more on the top end.
I do not need the dyno sheet to know the combination works for me.
Thumbs up to FM.
My before dyno is included. Before was an air cleaner, and Bub7 2-1 pipe w/ a PC5.
After - FM107 with same air cleaner and pipe.
I have not really posted about my experience with the upgrade until now because I wanted to get some miles on the bike. Now that I have ridden since February I feel I have enough experience with the build to comment.
I have about 6,000 miles on the motor since the upgrade, and I have no problems.
-more power throughout
-very smooth throttle response with no decel popping. Their dyno tune seems to be spot on.
-lots more on the top end.
I do not need the dyno sheet to know the combination works for me.
Thumbs up to FM.
My before dyno is included. Before was an air cleaner, and Bub7 2-1 pipe w/ a PC5.
After - FM107 with same air cleaner and pipe.
Road Captain
Joined: Apr 2011
Posts: 529
Likes: 1
From: Illinois
Go 107.I went from 103 to 107 some didn't think it was worth it but I'd do it again.Mines not from Fuelmoto I pieced mine together myself but Fuelmoto is a good way to go.I just had access to a good machine shop to bore my jugs.My numbers and curves look just like jjkruegs.I got about 3,000 miles on mine.
Tourer
Joined: Nov 2006
Posts: 405
Likes: 0
From: Council Bluffs, Iowa
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Advanced
Joined: Oct 2011
Posts: 77
Likes: 0
From: alabama
OK well y'all talked me into it!!
Got a price from a really good tuner and mechanic Rons Performance in Alabama for 3k for parts and labor and a dyno tune and thats for FM b heads also. That sound about right?
I already have my dynojet commander . Harley heavy breather and my supertrapp 2 to1. Maybe I can make some big numbers too!! Thanks
Got a price from a really good tuner and mechanic Rons Performance in Alabama for 3k for parts and labor and a dyno tune and thats for FM b heads also. That sound about right?
I already have my dynojet commander . Harley heavy breather and my supertrapp 2 to1. Maybe I can make some big numbers too!! Thanks
Road Captain
Joined: Apr 2009
Posts: 584
Likes: 0
I researched and flip flopped for about a year before pulling the trigger on my 107. After I did it I can't imagine not doing it, it is that good. Totally transformed the bike. It dynoed by Fuel Moto at 112HP/122TQ and I'm running stock headers with Monster Ovals. Not to mention it was 100 F the day it was dynoed. Just look at the torque curve, you couldn't ask for more.
that is very impressive