There is no easy way since these are pressed on. You have to use a pulley puller for this. Now the down side is that you will also have to get the pulley pressed on.
Your best bet is to just get a nose cone that already has the pulley size that you want on it.
Actually to take it off you need a three hole puller AKA a chicken foot, because yes it looks like a chicken foot. you need three 6mm bolts about 4 inch's long there should three holes in the face of the pulley. to put it back on just insert the crank bolt and tighten, it will go back on easy.
The Buick Riviera with supercharger should put out 240hp
There is a noise on the top of my 96 S/C buick riviera engine (in the supercharger housing) Sounds to me like bearings? How do Ilubricate S/C? And when do I Change this lubricant?
Power steering pulley puller Snapon?
A variety of options exist. See the Reatta forum http://www.reatta.net/. What is a riviera witch?
96 doesnt have the supercharger so yes What made you think it is a 1996? It's pretty tough to mis-identify a SuperCharger?
Neglect to replace the supercharger oil.
from underneath the car you can get right to them
RIGHT SIDE OF ENGINE NEAR CRANK PULLY
There is no button for the supercharger. The supercharger is always on because it is being driven by the belts of the engine. When you step on the gas, there is a vacuum line that is hooked up to the supercharger in which will close a little valve causing the boost to be diverted into the engine.
Next to the pulley that is on the supercharger is a little hex nut. Take this hex nut off and drain the oil by using something to suck it out. Once all of the oil is sucked out, use "GM Supercharger Oil" which is a special blend oil and fill it back up. Make sure you fill it up to about 1/4 inch below this hex nut.
To check the supercharger oil on a 1998 Buick Riviera, locate the supercharger oil reservoir, which is typically found on the supercharger itself. Remove the fill cap and visually inspect the oil level; it should be within the designated marks on the dipstick or fill neck. If the oil level is low, use a suitable supercharger oil, which is generally a synthetic oil specifically designed for superchargers, often with a viscosity of 5W-30 or similar. Always refer to the owner's manual for specific oil recommendations and capacities.
It takes 2 bottles of the GM supercharger oil (or Ford supercharger oil, they are the same product). Do not try to substitute anything else for it either. It is a specialized oil built for the iron bearings that are used in these superchargers.