splines in clutch hub

[zoot]

What would be causing the splines at the end of the clutch hub to break? I was replacing clutch spring and inspecting the disk I noticed a movement in the hub while still bolted up . took it off and found this along with a bad hub bearing

[rbabos]

Main shaft torsion effect causes the weaker hub spline area to yield first at the end. Fairly common. A better steel is needed in the hub.
Ron

[zoot]

Thanks Ron   That sucks   what do the guys do thats running power. My bike just has a 204 cam. it wasn't there till after I put the SE clutch pack in. I guess a little clutch slipping had some advantage.  Newton's Third Law using Harley's for test subject.

[Admiral Akbar]

Main shaft torsion effect causes the weaker hub spline area to yield first at the end. Fairly common. A better steel is needed in the hub.
Ron

I'd sat it was from crappy fit.. Splines on the shaft don't fit into the valleys of the hub..  I've seen tons of splines jab bikes that don't wear out..  Many only use a snap ring to stay in place.. 

[zoot]

Max hear is the spline pics  kinda hard to see but you can see where it is worn, spread or whatever you call it. probably should be replaced or next hub will do the same. But I am going to run it as is . I got another hub off ebay that looks good. Just run a weak spring and dont hot rod.

[rbabos]

Max hear is the spline pics  kinda hard to see but you can see where it is worn, spread or whatever you call it. probably should be replaced or next hub will do the same. But I am going to run it as is . I got another hub off ebay that looks good. Just run a weak spring and dont hot rod.

Wow, I did not expect to see damage on the shaft like that. The hub is the sacrificial part, I believe by design.
Ron

[Buffalo]

  It wouldn't surprise me one bit that the hub is another "powdered metal", cost saving part made in the swamps of the Philiphines, where quality control is sanctioned by bribes and corruption. All for profit margins and paying out the shareholders.
Just another convincing show of the greed rampant at HD IMO. If the bike cost was 10G, and they said it was made in Pakistan or India, maybe we would expect this type of deceit and be happy with these parts, but we should expect and get better from HD!! Made in the USA??   Buffalo

[FSG]

As Ron said, pretty common and as MAX said crappy shaft. 

Zoot didn't you do a chain conversion to an 06 or 07 Dyna?  The MoCo has a Mainshaft Upgrade Kit for the early 6 speeds which contains the latest mainshaft with the step to prevent the IPB Race from walking.

[Ohio HD]

  It wouldn't surprise me one bit that the hub is another "powdered metal", cost saving part made in the swamps of the Philiphines, where quality control is sanctioned by bribes and corruption. All for profit margins and paying out the shareholders.
Just another convincing show of the greed rampant at HD IMO. If the bike cost was 10G, and they said it was made in Pakistan or India, maybe we would expect this type of deceit and be happy with these parts, but we should expect and get better from HD!! Made in the USA??   Buffalo

I agree completely about manufacturing with substandard intention. It's done every day. But the powdered metal process in its self generally gives you a stronger material based on better distribution of the alloys in the steel. You have less likelihood of softer or harder areas in the finished machined product.

[twincam8888]

Seems like we replace a clutch hub every other week....along with tranny main bearings, inner primary bearings and compensators. Harley hounds the dealers about providing a world class experience while putting out a second rate product.

[rbabos]

  It wouldn't surprise me one bit that the hub is another "powdered metal", cost saving part made in the swamps of the Philiphines, where quality control is sanctioned by bribes and corruption. All for profit margins and paying out the shareholders.
Just another convincing show of the greed rampant at HD IMO. If the bike cost was 10G, and they said it was made in Pakistan or India, maybe we would expect this type of deceit and be happy with these parts, but we should expect and get better from HD!! Made in the USA??   Buffalo

I agree completely about manufacturing with substandard intention. It's done every day. But the powdered metal process in its self generally gives you a stronger material based on better distribution of the alloys in the steel. You have less likelihood of softer or harder areas in the finished machined product.

True. I believe all the sprockets in my softail for crank and balancers were powder. Next to impossible to wear out.
Ron

[2006FXDCI]

FSG , would you happen to have the part # for that mainshaft upgrade kit ?

[zoot]

Zoot didn't you do a chain conversion to an 06 or 07 Dyna?  The MoCo has a Mainshaft Upgrade Kit for the early 6 speeds which contains the latest mainshaft with the step to prevent the IPB Race from walking.

FSG Yes I did on my 07 Dyna  I have also been using a one peace bearing. It was Peer I got from Zippers. It was a single row ball bearing .When I checked it this time it was ok. I had heard that they would fail and maybe if I had more power it might have.I also took the shields off so the oil would flow through it .Maybe that was the problem for failure leaving the shields on. I did locate a open roller bearing,Hyatt U-1205-TS . It is same size as the one that came out but one piece. I will put this in when things get put back together.

[Justpassingas]

Seems like we replace a clutch hub every other week....along with tranny main bearings, inner primary bearings and compensators. Harley hounds the dealers about providing a world class experience while putting out a second rate product.

I'm on my second clutch hub along with replacing tranny mainshaft bearings, inner primary bearings, main shaft seal and stator & rotor on an 09 SG with 60k 

[Ohio HD]

When my hub stripped, I bought a Barnett Scorpion. Problem solved, and I was soon to need the higher capacity clutch anyway.

[zoot]

When my hub stripped, I bought a Barnett Scorpion. Problem solved, and I was soon to need the higher capacity clutch anyway.

on this clutch you use the stock basket and everything else is from barnett ?   Also it read there two sets of springs these are light or heave pressure?  If this is so this might be the way to go.  Sense my impute shaft is not in best of shape a tranny overhall might be instore

[Ohio HD]

When my hub stripped, I bought a Barnett Scorpion. Problem solved, and I was soon to need the higher capacity clutch anyway.

on this clutch you use the stock basket and everything else is from barnett ?   Also it read there two sets of springs these are light or heave pressure?  If this is so this might be the way to go.  Sense my impute shaft is not in best of shape a tranny overhall might be instore

You can use a stock clutch basket, I didn't, I used an Evolution Industries basket. Much heavier duty than stock. The Scorpion kit comes with four sets of springs, mild to "grunt" at he lever. I would dare say if you have only mild or stock power, the clutch is almost overkill, but, it will never wear out. I haven't even needed to adjust it in about 20k miles. And those are not highway cruising miles, lots of shifts and hard launches. 

[evo58]

Had same problem, the half of splines gone,beside this the whole clutch shell( weights 25 lbs)became unbalanced ,so the primary bearing race were destroyed, i dont know why the hub splines gone.

[FSG]

FSG , would you happen to have the part # for that mainshaft upgrade kit ?

Kit Number  35467-06B



6-SPEED TRANSMISSION MAINSHAFT KIT    -J04678

[FSG]

I like the look of that U-1205-TS (CYLINDRICAL ROLLER BEARING) over the Jims, Baker and other Ball Bearings.

[zoot]

I like the look of that U-1205-TS (CYLINDRICAL ROLLER BEARING) over the Jims, Baker and other Ball Bearings.

one small drawback  it is about .003 smaller on the 25mm compared to peer or allballs.  But a break cylinder hone took care of that.

[Admiral Akbar]

When my hub stripped, I bought a Barnett Scorpion. Problem solved, and I was soon to need the higher capacity clutch anyway.

So is the hub center on the scorpion cast steel or aluminum?

[Ohio HD]

When my hub stripped, I bought a Barnett Scorpion. Problem solved, and I was soon to need the higher capacity clutch anyway.

So is the hub center on the scorpion cast steel or aluminum?

The hub is steel.

[Admiral Akbar]

When my hub stripped, I bought a Barnett Scorpion. Problem solved, and I was soon to need the higher capacity clutch anyway.

So is the hub center on the scorpion cast steel or aluminum?

The hub is steel.

thanks