Blood sweat and tears plus a huge number of expletives and I have managed to replace the Cush Rubbers in my Laydown Box Clutch. I have subsequently thought about it and I wondered if the process might have been a lot easier if I had dumped the rubbers into the deep freeze for a few hours first. Anybody out there tried this approach?
I can not really see that freezing these cush drive rubbers is going to make them softer or more pliable. When replacing my clutch rubbers I mount a spare main shaft vertically in a vice and then pop the clutch spider/body on this. Next I use a locking plate with a long arm to turn the spider horizontally to open up the recesses and pop the rubbers in place. The last and usually the most difficult being the last. This get a light coating of soap to ease it into its slot. Some pushing with a piece of 5mm rod sometimes helps.
If you don't have a spare gearbox main shaft then the above can still be done if the gearbox is on the bike still. Just put the gearbox in top gear and apply and hold the rear brake on. Or wedge the rear wheel in the swinging arm. You may have to make up or borrow a tool to turn the spider.
Very hot water is more likely to help. The new ones are too big and stiff to fit. I wonder whether silicone RTV might work instead?