Crank Scissoring
Road Captain
Joined: Apr 2010
Posts: 709
Likes: 1
From: Maine
Bad crankshafts
Just like changing you exhaust ,windshield,seat when you buy a new Harley. Buy a SE forged crankshaft have it trued and welded take the one that came in your bike that is not even worth sending out to have trued ,put on a pair of gloves and hurl that piece of garbage through the front window of your favorite dealership.
Road Warrior
Joined: May 2009
Posts: 1,945
Likes: 4
From: Victoria, Australia
"IIRC" (as I think djl used it) is an acronym for "If I Recall/Remember Correctly".
Seasoned HDF Member
Joined: Nov 2010
Posts: 17,548
Likes: 7,197
From: Oxford, Nc
Just like changing you exhaust ,windshield,seat when you buy a new Harley. Buy a SE forged crankshaft have it trued and welded take the one that came in your bike that is not even worth sending out to have trued ,put on a pair of gloves and hurl that piece of garbage through the front window of your favorite dealership.
Road Warrior
Joined: Mar 2008
Posts: 1,783
Likes: 10
From: Oh
Having had many "built" motors (other than stock) I have decided to leave my bike stock on this one for this very reason. The many people here that do engine upgrades from stock should take this under consideration when doing their build. In my opinion HD cranks and their stock assembly cannot handle some of the high torque / hp that some builds are getting. I don't mean to imply all builds are suspect, just that you increase this risk of "scissoring" when doing the high number builds. The high torque builds to me are the most susceptible, especially when done on a heavy touring bike, riding two up. Having been with Harley all my life, this issue concerns me more than anything else I have encountered in the past. This issue and the compensator issue (SE comp installed already) have led me to question the engineering effort from the MOCO. It even swayed my decision to get a 96" over the 103". Again, this is just my opinion and I plan on just keeping with a stg 1 on my scoot.
Supporter
Joined: Mar 2008
Posts: 4,419
Likes: 90
From: Vermont
Having had many "built" motors (other than stock) I have decided to leave my bike stock on this one for this very reason. The many people here that do engine upgrades from stock should take this under consideration when doing their build. In my opinion HD cranks and their stock assembly cannot handle some of the high torque / hp that some builds are getting. I don't mean to imply all builds are suspect, just that you increase this risk of "scissoring" when doing the high number builds. The high torque builds to me are the most susceptible, especially when done on a heavy touring bike, riding two up. Having been with Harley all my life, this issue concerns me more than anything else I have encountered in the past. This issue and the compensator issue (SE comp installed already) have led me to question the engineering effort from the MOCO. It even swayed my decision to get a 96" over the 103". Again, this is just my opinion and I plan on just keeping with a stg 1 on my scoot.
I agree with you. During my early years, I used to build up my shovels, but once I was finally swayed into the EVO era, I started to keep all of my bikes stock with the exception of a stage 1. My 2010 96" FLHX runs pretty damn strong now in my opinion, and it is very smooth. If I ever do have problems with it, or decide to upgrade to a more powerful motor, I'd more than likely just order a factory new SE 120, and drop it right in no fuss no muss. I'm getting to old to worry about what if's. I'd rather keep up with my bucket list and ride it like I stole it until the day I need to worry about it, or the day my luck runs out and I become worm food!
Seasoned HDF Member
Joined: Mar 2009
Posts: 24,730
Likes: 9,241
From: Snow Hill, NC
When i did my cam swap i noticed the cam plate bearing was scarred up a bit...I put it back in but now it has me thinking??? 57000 miles on my 07...I wonder if that is one of my issues??? bike runs pretty good though...
Ultimate HDF Member
Joined: Nov 2008
Posts: 6,682
Likes: 12
I'm right with you smokindave. The very reason I haven't done the fuelmoto 107 build is because these crankshafts scare the hell out of me. I know some have been running them with no problems but I just won't do it. When the the time comes and it's more feasible and the warranty is long over, maybe I'll do it then but when you consider that these flywheel assemblies don't have bushings for the wristpins, you start looking at the cost of just buying a whole new SE setup. Then you look at the cost of one of those and you think, ****, I might as well go for the 120R. After that you think, well, that motor can make quite a bit of power and those flywheels are pressed tighter but ****, they still aren't welded. I wonder if they need to be welded too with the kind of power they're capable of. WTF I'm going to break the bank and drive myself crazy!
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Cruiser
Joined: Nov 2010
Posts: 134
Likes: 0
From: Tomball TX
Been having those same conversations with myself. Gonna do the 107, might as well do the heads it's only a few hundred more, now I'm thinking true and weld the crank and maybe I should do the cam plate and oil pump and maybe I should do....whatever. Now the 120 is on my mind and I'm wondering what I 'should' do to that if I go that route.
Beginning to think you and Smokindave are right. Just go ride it and enjoy it the way it is. Don't really 'need' that much torque.....but it sure would be nice to have it when I want it!
Beginning to think you and Smokindave are right. Just go ride it and enjoy it the way it is. Don't really 'need' that much torque.....but it sure would be nice to have it when I want it!
Road Warrior
Joined: Oct 2006
Posts: 1,916
Likes: 0
From: San Antonio, Texas
Same here - shakes like a Dyna at idle, which I love, but smooth as butter above idle. My motor is bone stock though, with just a stage 1. Is only happening to folks with modified motors? Is lugging a factor? Sorry, 39K on mine.