There are quite a few opinions as to why there is a downturn in motorcycle sales here in the UK on YouTube.
MCN have also issued a statement.
MCIA boss responds to multiple motorcycle dealer closures
As for the cost of living crisis being blamed to a degree, how much better does it have to be in order to address the shortfall in sales?
(Side Note)
I was in my local supermarket recently queuing up to purchase my weekly lottery ticket

There was a chap two people in front of me who bought 200 cigarettes costing over £140 with the lady directly in front of me spending over £80 on cigarettes!
Both looked to be of pensionable age so clearly not impacted by the "Cost of living crisis" and probably don't actually need the winter fuel allowance either!
(I guess that's another debate entirely).