Welcome to the forum.
Sorry that I don't have an answer for you, but this might help.
Here's a $5 service manual, it should contain the answer to your question:
Suzuki LT-A50 service manual repair 2000-2005 LTA50 LT50 - Download Manuals & Technical
Over the last few months, I've noticed a number of problems with 50's that had the restrictor removed.
Causing me to think that it is not a good idea to do this unless you are a expert moto mechanic. Apparently it is not as simple as it sounds. Secondly, these are meant to be first ATV's for young children. Why is there a need for speed? I can see a potential problem occuring with some overzealous DA calling these modifications child endangerment and some helpless parent going bankrupt fighting it in court and giving the whole ATV sport a black eye. I should know, I own a gun. The media has lumped the nut cases in with the legitimate sportsman and wants to ban 'em all.
Remember what this sport went through with 3 wheelers?
All it takes is one nut teaching his kid to jump of the Bay Bridge with a modified kiddie quad and all of us nuts will be in trouble. Or paying $200-$400 a year to legally own one. I can hear them now "Ban high performance ATV's" because someone "tampered" with the "required" restrictor.
Sorry if I sound like I'm making a speech hear, but this crap is all through our society. 100 years ago if some redneck killed himself doing something stupid, the reaction was, he asked for it. Today they have to legislate a cure for stupidity.
I'm just saying, let's not give them the ammunition.