Rear axle collar

I am trying to diagnose why my rear wheel wobbles. The wobble was so bad that the brake rotor ground into the side swing arm. It also ground some metal off of both calipers on the rear. It also looks like the previous owner drove with the parking brakes on and wore completely through the backing of the brake pads. The backing plate was wrapped around the adjustment piston, not brake material left.

Anyway, earlier Loyd193 mentioned that there were two collars on the rear axle. I only found the one between the wheel and the swing arm. Is there another collar on the axle on the outside of the swing arm, just inside of the axle nut? Part number 42312-MCT-000.

If this collar is missing, would this be the cause of my wobble?

Yes there should be a distance piece between the swinging arm & the axle nut, I guess the wheel has movement along the axle ?

Is the collar a stock item at your dealer ? If not do you have a lathe or machine shop nearby ? I could measure mine & post dimensions this evening if that would help

Or could it be wear/bearing from bike being used for something if wasn't designed to=trike conversion? Shop manual has pictures and I think charts on axle/wheel runout.

Easyrider wrote:

I am trying to diagnose why my rear wheel wobbles. The wobble was so bad that the brake rotor ground into the side swing arm. It also ground some metal off of both calipers on the rear. It also looks like the previous owner drove with the parking brakes on and wore completely through the backing of the brake pads. The backing plate was wrapped around the adjustment piston, not brake material left.

Anyway, earlier Loyd193 mentioned that there were two collars on the rear axle. I only found the one between the wheel and the swing arm. Is there another collar on the axle on the outside of the swing arm, just inside of the axle nut? Part number 42312-MCT-000.

If this collar is missing, would this be the cause of my wobble?

Hi Easyrider, There are two collars on the rear axle, Long with raised Shoulder against rear wheel. Short against bearing on the outside of the swing arm behind the nut. If this outside collar is missing, The wheel would wobble and be damaged. Newbies often do not see this short collar because it sticks in the swingarm. It is not possible to correctly torque the axle nut without this outside collar being in place. The 102 foot pound torque is specified for a properly lubricated thread as well as the shoulder of the nut where it contacts the out side collar. If it worries you that this nut may loosen you can increase the torque 10%, I usually torque this Nut Thoroughly lubricated with White grease to 110 foot pounds. This nut torque will not damage anything and will not back off, Years of Experience with all kinds of nuts has taught me this! If your wheel splines are damaged from being loose, Let us know here and we will try to save your wheel.

Happy motoring Lloyd 193.

Lloyd193,
Thanks for the information. It all makes sense. When I tried to torque the nut, it felt as if the nut was not going to reach the 102 lbs/ft. I stopped tightening the nut and tried to see if the inner collar had any play and it did. The collar would slide about a half an inch. I then did the same test while applying inward pressure on the swing arm, and that seem to take care of the end play of the inner collar. That made me looking for a reason why the nut did not apply pressure to the inner collar when properly torqued. I check with the service manual and I noticed that there was another collar under the nut. I believe that the previous owner had lost the outer collar. I drove the Swing 250 miles back to my daughter's home in Idaho and did not know that there was a problem until I tried to adjust the parking brakes and found the wobble. Replaced the rear wheel from a 2013 Swing with a CT. Now I need to get the both collars, and nut from Partzilla. The calipers are coming from eBay. Looks like I will not be riding this year in Idaho. Leaving for Honolulu next Wednesday. At least I can still ride my other Swing in Hawaii.