Any 20inch forks will fit.
Doubtful that they would fit but even if they did fit the exc suspension is way too soft for a sx.
"should" doesn't really fit. All pics Google can find show them having suspension forks, but if the rider wants a suspension fork can be replaced with a rigid fork of the correct length.
can any kind of scooter bars fit on mgp forks
As long as they fit safely on the forks or lift platform.
It will if you have bmx (or bmx style) cranks.
They fit the forks perfectly, but they do not fit on the back. You need certain size washers for it to be able to fit.
no they don't you need a shim to make them fit the forks
No, there are several different diameters to choose from.
It is unlikely that the suspension from a Yamaha YZ80 will fit directly onto a Honda XR100. The YZ80 is a smaller and lighter off-road bike than the XR100, so the suspension components may not be compatible in terms of size and mounting points. It is best to use suspension components designed specifically for the XR100 to ensure proper fitment and performance.
The downhill forks will fit on a normal mountain bike with a little fabrication.
Yes, all handlebars have the same diameter out by the grips.