The 87 uses a Mikuni Tm38ss model carb.i already gave u info on the proper carb# s so plz use it the 43B00 carb is suppose to have a 420 main jet a 30 pilot jet a 0-6 needle jet a 6DH6 Needle and a 2.0 # rd slide FYI make sure it's the larger 1 lt250r s used a smaller 2.0 #rd slide East coast Atv accidently gave me that smaller 2.0 slide and I had to go Bak the nxt day luky for me they re close to me and I got the correct slide idk y they jst didn't add more # s to the slide to tell them apart.