How does a "bad" tune, take out a 5 pc crank??

[Hillside Motorcycle]

Client we sold product to, was alerted that his 5 pc. crank was buggered, because the tune was bad, and during start up, was "fighting" itself.
Upon hearing this, I cannot help but think, that the starter motor itself, must be one bad motherf**ker, in order to knock the crank out?
Thoughts??
Scott

[rredneckn2]

Im with you on this one.And I want one of those starters also  LOL

[Ridetard]

Please elaborate, this is a new one.

[hightop]

That's a good one! Never fails to amaze me the theory's people come up with for failures in engines, transmissions, etc. The finger always seems to be pointing away from the person with the theory. Find out who made that starter clutch for me Scott, I'd like to stock them! 

[rredneckn2]

Scott is this the one getting a rebuild by the crank mfg as we speak.Under warranty of course

[metaliser]

This coming from the manufacture no doubt, there seems to be alot of problems with this crank one way or another. 

[rredneckn2]

These cranks are very TUNE sensitive as others have failed do to the same.Good thing the crank mfg is gonna tune it this time!LOL

[redmtrckl]

How is lugging a part of the tune?

[FXDRYDR]

 

[Admiral Akbar]

If it were a bad tune, wouldn't we have an epidemic of bad stock cranks? 

Max

[partycrasher]

thanks goodness it's a "rebuildable 5 piece crank".......

..

[blackhillsken]

Max,
Very insightful of you (& very true).   LMFAO

Scott, my sympathies.   Reminds me of a Steve Martin sketch that he played a Dark Ages barber/physician promoting the advances in medicine.  Something like...... "just 50 yrs ago, we would have thought your daughter suffered from demonic possession, but, due to advances in medicine,  we now know she has an imbalance of bodily humors caused by a toad or small dwarf living in her stomach".

Point is,  ridiculous theories about the Harley world abound too.

[ThumperDeuce]

This is the first thread that I have seen about these wheel sets failing.  How wide spread of a problem is this?

[wurk_truk]

been a few on V-twin  Actually I think rredneckin is thinking of the last failure over there, and I believe the one scott is referring to, is new.  Hope not, though.

[crazylore]

Good reply Max

[wurk_truk]

If it were a bad tune, wouldn't we have an epidemic of bad stock cranks? 

Max

maybe it is!

Damn stock MOCO tune tune my crank out!

[02FYRFTR]

Maybe it just might be time to think of a one piece hot forged crankshaft with side by side PM rods, split caps and plain shell bearings !!!  Seems to me the five piece when subjected to heavy loading is not much better than the three piece pressed and welded.

[Buglet]

Had a sprocket shaft snap while starting it.

[04glide]

Bad tune huh? yeah right. Sound like something the MOCO would say.

[choseneasy]

02FYRFTR,  I gotta agree with you on that---never here too much on the S&S Wedge but it is a robust set up. The Victory's have the same set up and are very solid.

[se]

i dont understand what the big deal is.  imo who gives a rats a$$ so what as long as its getting fixed thats the main answer. as far as the reason why it went bad i cannot comment on that as i did not personally see the crank so i cant say what is wrong.. if that was the reason why it went bad then thats what it is.

[bigpete1]

the x wedge is not popular inmho cause it only fits custom frames and chopper craze is in the crapper ,if that motor fit in twin cam chassis there would be some big power x wedge motor around here ,thanks pete

[Hillside Motorcycle]

i dont understand what the big deal is.  imo who gives a rats a$$ so what as long as its getting fixed thats the main answer. as far as the reason why it went bad i cannot comment on that as i did not personally see the crank so i cant say what is wrong.. if that was the reason why it went bad then thats what it is.

George,
Well what if the answer was an incorrect alignment of Venus and a local farmer's woodchuck hole??
Would that be a good reason as well??
No one knows, but that response in regards to it being harmed upon start-up seems a bit far-fetched. Don't you agree??
MIGHT be able to put my arms around the idea of it slipping/shifting, if the guy was dropping the clutch at 6200 rpms with a 8" Goodyear slick, at the local track, but NOT a 1.4-2.0 amp starter motor. 
Scott

[02FYRFTR]

Moral of the story if it has threaded fasteners ,taper and components, installer must be the final quality control point. Don't trust anyone!!!

[BVHOG]

i dont understand what the big deal is.  imo who gives a rats a$$ so what as long as its getting fixed thats the main answer. as far as the reason why it went bad i cannot comment on that as i did not personally see the crank so i cant say what is wrong.. if that was the reason why it went bad then thats what it is.

I agree, I am sure without seeing it we can tell exactly what caused the problem, (sarcasm)bad tune is a pretty broad statement, too much initial advance at startup (only part of the tune) could cause a cranking rotating assembly to stop and suddenly change direction of rotation upon ignition. Would this slip the crank, doubtful but not immpossible. The more likely answer would be that someone planned on riding this bike hard, very hard, maybe even race conditions being the reason for purchasing the crank in the first place.
I gotta ask, what the hell is the purpose of this thread in the first place? To discredit a reputable business who is making things right whether it was their fault or not?  Motivation for this?  Threads like this are what destroys the overall health of a forum, this is a great place, why ruin it?