Fortunately for us who own the Model 98, the trigger is a relatively simple mechanism. It pivots on one pin and when pushed in, it moves up and clicks the sear, which releases the rear bolt. Now, the easiest MOD to do to the trigger is also one of the best working. If you look at how the sear rests, when the rear bolt comes back, the sear moves into a slot and is then caught not by the slot, but by another pin at its front. If we can make this pin a little thicker, we can make the sear barely sit in the rear bolt. Then, the trigger pull will be extremely light
So, what you can do is remove the front pin that the sear rests on. Then, take some scotch tape and wrap it around the pin about 5 or six times. Then take a knife and try to cut the tape so that the pin rests fine, but the tape is not caught in the body holes. Reinsert the pin. You should notice the sear resting barely in the rear bolt. Put your gun back together, and you will never regret it. You can adjust the amount of tape so that you can adjust how much the sear rests in the rear bolt. Be careful though, if you put in too much tape, the sear will not grab the bolt at all and the gun will not work (it will go full auto and be a very bad thing). So, now shoot much faster and enjoy your modified trigger.