Triumphrat

WSC · 11-06-2012, 11:12 AM

Improper assembly?

The only way I can see it would crack is if it was installed against an uneven surface. How it would get uneven in the first place remains a mystery...

Unless somehow the crack originates at the index mark...

Slinky · 11-06-2012, 01:37 PM

The collar is shaped to fit into the slot in the swingarm, it is possible to assemble it wrongly so that there is undue stress on the collars, that would also cause the indentations on the swingarm slots.

triplestrength · 11-06-2012, 01:46 PM

Imagine this.
Previous owner trying to remove spindle thats a bit stuck, uses pry bar levering against this piece and breaking it.
Or mechanic replacing tyre the other day doing it?

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Brian C · 11-06-2012, 09:29 PM

Well I dropped off the part at the shop and they put it on. Rode the bike home with no problem. I did not ask if they closely inspected the swing arm but am confident they would have said something if there was a problem. I will take a good look at it tomorrow in the day light. I suspect that the last mech that worked on the bike over torqued the lug at last tire change and cracked it but the lug held it tightly in place...thankfully! I often ride on the interstate at high speed (70mph +). You can see in the two pics I posted that it's simply split in half and the exposed metal is rusted so it's been like that for awhile. I think I just got a bye on this one.

Brian C · 11-06-2012, 09:35 PM

I don't know if the the forum allows for maintenance alerts on the TBS, but I think this may be worthy. Any one with a TBS or other motorcycle that uses the same part should be notified to do an inspection soon. I can only imagine what would happen if this part came out while underway at highway speed. I think the bike would literally come apart. Can someone notify the site administrator please.

CajunRider · 11-06-2012, 10:11 PM

Oh snap... that is scary stuff!!

Thanks for posting pictures. I'll be sure to check mine!!

steve.g · 11-06-2012, 10:31 PM

I've seen them break. It's usually caused by over tightening of the axle nut and / or incorrect wheel alignment because the chain isn't adjusted right. Worst case scenario ... block breaks , falls out and you get a really scarey wobble that could put you down. I doubt the axle would fall out or break because you would know something was wrong way before then.

CajunRider · 11-07-2012, 08:48 PM

Quote:

Originally Posted by steve.g

I've seen them break. It's usually caused by over tightening of the axle nut and / or incorrect wheel alignment because the chain isn't adjusted right.

I will definitely keep that in mind.

I usually just give the axle nut a good pull with a 2 ft. long wrench (1/2" socket drive). I'm going to have to put a torque wrench on it one day to see how much I've been over tightening all this time.