What is this?

[Bob from Accounts]

After reinstalling the rear wheel I was clearing up my tools and I found this lying on the floor in front of the rear wheel.
As it has road grime on it I thought it must fit somewhere above the wheel but I can’t find any holes that it might fit in.
All help appreciated as it’s driving me nuts.

 

[bimota]

inside of the throttle side of the swing arm this big grommet fills the hole thats there

so inside of the right side of swing arm

rob

 

[bimota]

when you take rear wheel off and you can see the inside of the swing arm you,ll see a big hole right side of it the grommet goes there i have siliconed mine in place you can put it back in easy with wheel in place



rob

 

[Bob from Accounts]

Many thank, sorted, it’s now back in place.

 

[SparrowHawkxx]

There is another one on the front side of the swingarm, just behind the shock. However I don't think its as prone to come out.

What model year is yours? I thought they had done something on the Gen2 bikes to make them more secure.
On my 2013, I lost the one on the side of the swingarm sometime during the first year of ownership. I saw a thread on here about the problem so I checked and it was missing. Ordered a new one and used some black silicone sealant, to hold it in place, as bimota did, and have not had a problem with it for the last 6 years. I don't remember if I removed the one on the front to seal it also but I probably did.

 

[HeliMark]

Many thank, sorted, it’s now back in place.

Like what was said, you may want to silicone it in. Several people have had rust/corrosion issues because the plug was missing and water was allowed to enter and accumulate in the swing arm.