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12-07-2007, 09:11 AM
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#1 (permalink)
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IronButt
Join Date: Jan 2006
Location: FORKED RIVER, NJ
Posts: 262
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Crankshaft Pro-plug ???
Can anyone elaborate on exactly what this pro-plug is ???
I understand the welding of the crank pin. What is with the pro-plug
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Little_tom
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12-07-2007, 10:40 AM
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#2 (permalink)
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Banned
Join Date: Apr 2003
Location: Orlando Florida
Posts: 5,114
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Quote:
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Originally Posted by TOMPAGLIA2
Can anyone elaborate on exactly what this pro-plug is ???
I understand the welding of the crank pin. What is with the pro-plug
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From my understanding it is pressed inside the crank pin which puts more pressure on the flywheel/crankpin mating surface. I never seen it but that's the way I believe it works
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12-07-2007, 03:36 PM
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#3 (permalink)
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IronButt
Join Date: Sep 2002
Location: Fort Worth TX
Posts: 6,311
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The end of the stock pin is not solid it has a shallow area that is bored from the factory, the pro plug press fits in the end of the crank pin to increases the pin to wheel press fit.
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12-07-2007, 03:59 PM
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#4 (permalink)
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Banned
Join Date: Jan 2007
Location: Land Of The Free and Home Of The Brave, United States Of America
Posts: 3,694
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Quote:
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Originally Posted by HDMD88
From my understanding it is pressed inside the crank pin which puts more pressure on the flywheel/crankpin mating surface. I never seen it but that's the way I believe it works
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Thats exactly how it's done Doc. 
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12-08-2007, 02:01 PM
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#5 (permalink)
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Speed Addict
Join Date: Mar 2006
Location: Nevada
Posts: 467
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I will stick with tig welds in four places on each side of the pin. I do look forward to seeing Reggie's when it comes out.
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12-08-2007, 05:22 PM
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#6 (permalink)
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Banned
Join Date: Jan 2007
Location: Land Of The Free and Home Of The Brave, United States Of America
Posts: 3,694
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Quote:
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Originally Posted by darktrainer
I will stick with tig welds in four places on each side of the pin. I do look forward to seeing Reggie's when it comes out.
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 I wish R&R had theres ready now.... It would be in my build if it was...
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12-08-2007, 07:35 PM
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#7 (permalink)
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Let er rip!
Join Date: Jun 2004
Location: MN
Posts: 2,876
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And I quote.......
Great events have no fear of time!
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12-08-2007, 08:45 PM
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#8 (permalink)
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Lifetime Premium
Join Date: Nov 2005
Location: louisiana
Posts: 11,928
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Quote:
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Originally Posted by darktrainer
I will stick with tig welds in four places on each side of the pin. I do look forward to seeing Reggie's when it comes out.
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you and me both! factory is press fit---- press fit more for the extra bucks is reliable?
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12-08-2007, 09:42 PM
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#9 (permalink)
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IronButt
Join Date: Dec 2006
Location: North Carolina
Posts: 621
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Quote:
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Originally Posted by darktrainer
I will stick with tig welds in four places on each side of the pin. I do look forward to seeing Reggie's when it comes out.
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My crank and the other ones I've seen welded were done at 3:00 and 9:00.
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05 FLSTNI 107ci
11:1,T-Man Stage 3 Heads, Baisley Roller Rocker arms, SE Forged Stroker-worked by Darkhorse Cranks, T-Man TR-662 roller driven cams, HD-B Lifters, Feuling Camplate, Superpump and Adjustable Pushrods, Wiseco Pistons, Cometic .030", HPI 51mm Throttle Body, SE Bullet Breather, AIM Lockup Clutch and easy pull ramp
V&H Propipe 2-1, THUNDERMAX w/AT, Legend Air, Zumo 550
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12-09-2007, 07:26 AM
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#10 (permalink)
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IronButt
Join Date: Apr 2006
Location: Helena MT
Posts: 471
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Quote:
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Originally Posted by nc-renegade
My crank and the other ones I've seen welded were done at 3:00 and 9:00.
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Interesting.  Mine was welded in 2 places (each side) at 12:00 and 6:00. This was the direction that runout was off. This is the first my mechanic had welded. We'll see if welding locations make a difference, but I kinda doubt it. I'm not too hard on mine. I suspect that most of my runout was a factory installed "feature".
-- gr8whyt
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2004 FLSTCI - "White Owl" 
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12-09-2007, 07:43 AM
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#11 (permalink)
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Banned
Join Date: Apr 2003
Location: Orlando Florida
Posts: 5,114
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I haven't read in any of these post about welding flywheels if anyone has checked the trueness of the wheels after the weld..... 
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12-09-2007, 08:00 AM
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#12 (permalink)
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OUCH! That hurt
Join Date: Jan 2007
Location: Oak Lawn, IL.
Posts: 608
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Welding the flywheels causes them to move so you can use the weld to true the wheels up. just running a bead on them will knock them out. This is probably why you see it welded at 12 & 6. If it was welded in a jig it will be at 3 & 9.
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12-09-2007, 08:14 AM
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#13 (permalink)
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F$ck Google ads
Join Date: Jul 2004
Location: Vienna, Austria
Posts: 3,207
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Related question: HD changed the fly wheel material from forged to cast ductile iron sometime in 2004. The cast wheels can be identified easily:
AFAIK cast iron and steel is next to impossible to weld together in a durable fashion. I happen to own one of the welded cast iron flywheel assemblies and wonder why I have noticed an increasing vibration level lately on my 107". Any thoughts on this are welcome
EDIT: Current crank looks like this (at assembly), run out was an unimpressive 0.002"
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Last edited by ViennaHog; 12-09-2007 at 09:34 AM.
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12-09-2007, 08:38 AM
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#14 (permalink)
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IronButt
Join Date: Apr 2006
Location: Helena MT
Posts: 471
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Quote:
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Originally Posted by wfolarry
Welding the flywheels causes them to move so you can use the weld to true the wheels up. just running a bead on them will knock them out. This is probably why you see it welded at 12 & 6. If it was welded in a jig it will be at 3 & 9.
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I think what you said here is exactly what my mech's thinking was. And each of the welds were maybe 3/8 to 7/16 long beads. After welding, back on the truing stand, these flywheels showed nearly zero runout. And in the case (with the new Timkin bearing) runout is nearly immeasurable. Now the cam gears (oversize on pinion shaft) are quiet as a church mouse.
Good pics there ViennaHog. And I was wondering about that. Fortunately mine from my 04 Softail look exactly like your early style pic.
-- gr8whyt
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2004 FLSTCI - "White Owl"
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12-09-2007, 03:29 PM
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#15 (permalink)
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VTF Site Sponsor
Join Date: Dec 2006
Location: Mitchellville,Ia.
Posts: 2,307
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R&R just got a set back from Hobans that were proplugged and welded, a better idea yet I believe because the weld is probably just a superfical fix that I do to every flywheel set I get my hands on. Doc, I usually have to pinch the wheels to get them in true so I over pinch them .001" now to compensate for the welding and they either don't move or come back true.
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