Keith.owen wrote:My rockers are a bit wobbly on their spindles ...
Even the worst case where both the OD of the spindles and the ID of the rocker shafts are worn they probably
can be dealt with relatively easily and relatively inexpensively. I only included the qualifier "probably" because I don't know if you've run your bike to the point where the rockers are flopping around horribly.
Assuming the wear is in the thousandths rather than multiples of tens of thousandths, the rocker shafts can be honed just enough to make them round again and if the steel is case hardened rather than just heat treated there still will be plenty of thickness left. If the hardness is from heat treating, you don't even have to worry about the thickness removed.
Once the shafts are honed the IDs can be measured (which can be any random size whatever, not simple fractions of an inch), the spindles would be hard chrome plated and ground to give the appropriate clearance for the shafts. As an example, both shafts may have left the factory at 0.500"-dia., but after custom fitting to the freshly honed rockers one shaft might need to be 0.493" and the other 0.495".
I'm better equipped than most, having a Sunnen hone in my garage and a toolpost grinder for my lathe. I mention this because I hard chrome plated the spindles on my 1928 Ariel's cam myself and then ground them back to the original size. The fact I was able to do this myself tells you the cost to have similar work done for you shouldn't be exorbitant. This would be my preferred solution since any bush thick enough to push into place would require removing quite a bit of material and thus significantly weakening the rocker arm.