Author Topic: crank truing and welding.  (Read 4322 times)

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Offline vgfxst05

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crank truing and welding.
« on: Thursday, December 23, 2010. 12:48:24 PM. »
Any place in the central Illinois area that will true,plug and weld cranks? Thanks Vic G.

Offline 02FYRFTR

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Re: crank truing and welding.
« Reply #1 on: Thursday, December 23, 2010. 01:47:39 PM. »
DarkHorse and Revolution Performance are about $32.00 away using UPS or FedEx !! be sure whoever does your assembly to press it apart to check the condition of the rods, bearings and main connecting pin.  I have been invoved in over thirty twin Cam flywheels during the past two years and lately I am seeing rod damage on earlier as well as late model assemblies.
« Last Edit: Thursday, December 23, 2010. 03:01:28 PM. by 02FYRFTR »

Offline prodrag1320

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Re: crank truing and welding.
« Reply #2 on: Thursday, December 23, 2010. 01:49:41 PM. »
we`re in bloominton ind.,we do it
www.veetwinperformance.com
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Offline strokerjlk

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Re: crank truing and welding.
« Reply #3 on: Thursday, December 23, 2010. 01:59:56 PM. »

from another central IL. resident :bike:
WFO Larry in downers grove does also. :up:


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Offline prodrag1320

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Re: crank truing and welding.
« Reply #4 on: Thursday, December 23, 2010. 03:05:15 PM. »
i think larry`s in oak lawn,ill (my home town),he may be closer to you
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Offline BVHOG

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Re: crank truing and welding.
« Reply #5 on: Thursday, December 23, 2010. 03:08:53 PM. »
DarkHorse and Revolution Performance are about $32.00 away using UPS or FedEx !! be sure whoever does your assembly to press it apart to check the condition of the rods, bearings and main connecting pin.  I have been invoved in over thirty twin Cam flywheels during the past two years and lately I am seeing rod damage on earlier as well as late model assemblies.

VERY good advice,  had one in with a noise last summer that drove us nuts trying to figure out, turns out it was the hardened surface of the big rod ends not being so hard anymore.
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Offline strokerjlk

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Re: crank truing and welding.
« Reply #6 on: Thursday, December 23, 2010. 03:14:46 PM. »
i think larry`s in oak lawn,ill (my home town),he may be closer to you

you are correct my bad
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Offline LilEvilAmy

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Re: crank truing and welding.
« Reply #7 on: Thursday, December 23, 2010. 07:42:36 PM. »
had one in with a noise last summer that drove us nuts trying to figure out, turns out it was the hardened surface of the big rod ends not being so hard anymore.
We had a similar situation at our shop.  Did yours look anything like this?
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Offline d1hojo07

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Re: crank truing and welding.
« Reply #8 on: Thursday, December 23, 2010. 09:26:23 PM. »
DarkHorse and Revolution Performance are about $32.00 away using UPS or FedEx !! be sure whoever does your assembly to press it apart to check the condition of the rods, bearings and main connecting pin.  I have been invoved in over thirty twin Cam flywheels during the past two years and lately I am seeing rod damage on earlier as well as late model assemblies.

VERY good advice,  had one in with a noise last summer that drove us nuts trying to figure out, turns out it was the hardened surface of the big rod ends not being so hard anymore.

So, what did the noise sound like?

Offline Scott P

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Re: crank truing and welding.
« Reply #9 on: Friday, December 24, 2010. 08:29:34 AM. »
had one in with a noise last summer that drove us nuts trying to figure out, turns out it was the hardened surface of the big rod ends not being so hard anymore.
We had a similar situation at our shop.  Did yours look anything like this?

Ouch.
Scott
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Offline BVHOG

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Re: crank truing and welding.
« Reply #10 on: Friday, December 24, 2010. 12:53:01 PM. »
Rod looks familiar, the noise sounded like what we thought could be the rotor rubbing the stator, the strange part was if you loaded the bike slightly at idle the sound would disappear. The owner of the bike in question rides that bike harder than pretty much anyone I have ever seen, 90mph plus from WI to Sturgis pulling a heavily loaded trailer is standard operating procedure. The bike was an 03 bagger and had around 40 thousand miles on it as I recall.
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Offline Sonny S.

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Re: crank truing and welding.
« Reply #11 on: Friday, December 24, 2010. 02:20:53 PM. »
I would think by the time a rod looks like that there would be signs of a problem on the oil drain plug.
Doesn't mean diagnosing the problem would be easy though

Online rigidthumper

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Re: crank truing and welding.
« Reply #12 on: Saturday, December 25, 2010. 09:17:20 AM. »
Buddies 01 Ultra had same noise- we pulled it completely down, found no obvious source in the valve train or primary, so we sent crank to John Hoban for inspection- he discovered the male rod had lost the hardness on about 2/3rds of the circumference- looked just the the one Amy posted. New rod set, bearings and pin- all good now. Standard 95"/203 build w/145,000 miles.

Online superglidesport1

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Re: crank truing and welding.
« Reply #13 on: Saturday, December 25, 2010. 10:09:53 AM. »
had one in with a noise last summer that drove us nuts trying to figure out, turns out it was the hardened surface of the big rod ends not being so hard anymore.
We had a similar situation at our shop.  Did yours look anything like this?

Riding buddy had an '06 Road King with a solid, low end knock in it. The knock would subside when I disconnected the spark plug cable on the suspected cylinder. This allowed me to isolate the problem to a piston & rod assembly and justify pulling the engine to disassemble the crankcase. Replaced the flywheel assembly with an SE stroker and went big bore to 103 while it was apart.
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Offline choseneasy

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Re: crank truing and welding.
« Reply #14 on: Saturday, December 25, 2010. 04:48:04 PM. »
I would be curious to know what state of tune these bikes had---I would not think the hard surfacing would wreck on a properly  tuned bike.  ( maybe it is a quality issue... I would hope not tho)

Offline autoworker

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Re: crank truing and welding.
« Reply #15 on: Saturday, December 25, 2010. 05:29:23 PM. »
The factory rods have no races and are induction hardened.They don't last forever.It is a manufacturing decision with a balance between durability and cost to manufacture taken into account.
It must be true,I read it on the internet.

Offline choseneasy

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Re: crank truing and welding.
« Reply #16 on: Saturday, December 25, 2010. 07:48:19 PM. »
 I know they have went to the different rods, but I have seen similiar damage on old style rods from a bad tune. Curious as to the work done on these motors ( or if they are stock)

Offline Sonny S.

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Re: crank truing and welding.
« Reply #17 on: Saturday, January 01, 2011. 06:45:03 PM. »
had one in with a noise last summer that drove us nuts trying to figure out, turns out it was the hardened surface of the big rod ends not being so hard anymore.
We had a similar situation at our shop.  Did yours look anything like this?

I'm assuming that the noises made with this type of rod damage were more of whooshing/scrapping sound, than a knock ?  Was the noise noticable at idle or other rpm ranges, and load/no load ?

Offline LilEvilAmy

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Re: crank truing and welding.
« Reply #18 on: Saturday, January 01, 2011. 09:26:51 PM. »
The one that we had in our shop had a very faint knock that increased with engine speed/rpm. 
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Offline Ridetard

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Re: crank truing and welding.
« Reply #19 on: Sunday, January 02, 2011. 04:12:11 AM. »
Something I been thinking about for a while.


This may be a dumb question,.  Why would you send only the crank to be trued?  Whouldn't make more sense to send the entire lower unit in?   I would assume the only real way to see if your crank is true is by checking it in the case?

Am I wrong?


Offline prodrag1320

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Re: crank truing and welding.
« Reply #20 on: Sunday, January 02, 2011. 05:23:48 AM. »
the case has nothing to do with the f/w ass`y being true or not,but if the f/w`s where really wacked,ide check all the bearings in the case
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Online superglidesport1

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Re: crank truing and welding.
« Reply #21 on: Sunday, January 02, 2011. 05:49:37 AM. »
had one in with a noise last summer that drove us nuts trying to figure out, turns out it was the hardened surface of the big rod ends not being so hard anymore.
We had a similar situation at our shop.  Did yours look anything like this?

I'm assuming that the noises made with this type of rod damage were more of whooshing/scrapping sound, than a knock ?  Was the noise noticeable at idle or other rpm ranges, and load/no load ?

The one and only one I dealt with had a fairly noticeable and solid knock. Again, disconnecting the spark plug cable reduced the knock noticeably.

Frank
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Offline aharp

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Re: crank truing and welding.
« Reply #22 on: Sunday, January 02, 2011. 06:50:46 AM. »
The piston skirts will usually show signs of the rods being out. The metallic flecks will get into the oil at the bottom of the case and get slung into the skirts and the front sides of the cylinders.
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Offline BVHOG

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Re: crank truing and welding.
« Reply #23 on: Sunday, January 02, 2011. 07:14:31 AM. »
Good call Aaron, that is exactly what we found on tear down.
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Online rigidthumper

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Re: crank truing and welding.
« Reply #24 on: Sunday, January 02, 2011. 08:58:36 AM. »
Amen- I had a very wise old man (Eddie Boomhower) tell me if you see shiny pieces imbeded in the piston skirts, it can only be bad news- Rod or Rod bearing particles- time to rebuild the flywheels.