Swing arm wiggle

[Chomps-Lewis]

Hello everyone,
I drive a 2001 hayabusa and this weekend I took the wheels off the get the tires replaced. While doing that my brother noticed that the rear swing arm seemed to have a bit of a wiggle to it. While looking it over and looking up swing arm videos, I noticed something was off about my bike, In the videos, the mention there being a sort of castle nut securing the right side of the swing arm joint, my bike seems to be missing that:

Can that missing nut lead to wigging in the swing arm? should I get a replacement?

I feel like Im grasping at straws to avoid what's the reality, the reality that Ill need to do the swing arm bearings next, seems like every time I pony up and fix something on this bike, something else pops up lol.
What do yall think?

 

[Dnyce]

You definitely need that nut

 

[kml]

If that's the shape of the awing arm, and if it were mine, I'd inspect , grease or replace as necessary the swing arm bearings all the suspension linkages, the steering head bearings, wheel bearings and ensure the axles are greased.
I would NOT ride it like that before going over the whole damn thing with a fine tooth comb.

Cheers
ken

 

[Chomps-Lewis]

You definitely need that nut

If that's the shape of the awing arm, and if it were mine, I'd inspect , grease or replace as necessary the swing arm bearings all the suspension linkages, the steering head bearings, wheel bearings and ensure the axles are greased.
I would NOT ride it like that before going over the whole damn thing with a fine tooth comb.

Cheers
ken

Know where I can get a replacement? Tried looking it up, maybe I wasnt using the right term for the nut, but all Im coming up with is the sockets to remove it.

 

[sixpack577]

Partzilla or Motosport
in the oem section

 

[Chomps-Lewis]

Anyone know the size spanner socket Id need for this castle nut? I got a couple on hand in the garage but I want to make sure I got the right one.
Thanks for all the help so far!

 

[nintastio]

Are you planning to cut a socket to make your own? I read up a bit on doing that but I decided to just buy one on eBay. Here is the link if you decide to go that route:

engine socket service set

 

[Chomps-Lewis]

Are you planning to cut a socket to make your own? I read up a bit on doing that but I decided to just buy one on eBay. Here is the link if you decide to go that route:

engine socket service set

Thanks for the link, Ill consider buying this if I dont have one on hand. I was considering making my own if I didnt have one in that size but this seems like an easier option.
If its 35mm, I may have one that size laying around...

 

[Bigboy Busa2]

Get that nut replaced

 

[Chomps-Lewis]

Does anyone recommend bearings to do the swing arm? do kits exist?

 

[sixpack577]

Yes they do.
Allballsracing used to sell Busa swingarm bearing kits.