A couple of top tips:
1.The brake shoes do not need to be removed to install/remove the old part. Once the bolts are removed it can be slid up and out. The job takes about 15 minutes a side.

2.You need a 10MM wrench for the bleeder and mounting bolts.

3.Remember to use the old removable dirt/water seal from your old unit.

It is considered good practice to replace these in pairs. Brake fluid will take the path of least resistance. If only one is replaced and it functions more efficiently than the older cylinder the result will be uneven stopping. Your quad may end up pulling to the left or right.

Fitment:
1987-1995 QuadRunner (LT-4WD) - FRONT WHEEL BRAKE (MODEL H/J/K/L)
1987-1995 QuadRunner (LT-4WD) - FRONT WHEEL BRAKE (MODEL M/N/P/R/S)
1988-1996 QuadRunner (LT-F250) - FRONT WHEEL BRAKE (MODEL J/K/L)
1988-1996 QuadRunner (LT-F250) - FRONT WHEEL BRAKE (MODEL M/N/P/R/S/T)
1991-1998 King Quad (LT-F4WDX) - FRONT WHEEL BRAKE (MODEL M/N/P)
1991 King Quad (LT-F4WDX) - FRONT WHEEL BRAKE (MODEL R/S)
1993-1995 King Quad (LT-F4WDX) - FRONT WHEEL BRAKE (MODEL R/S)
1996 King Quad (LT-F4WDX) - FRONT WHEEL BRAKE
1996 QuadRunner (LT-4WD) - FRONT WHEEL BRAKE
1997 King Quad (LT-F4WDX) - FRONT WHEEL BRAKE
1997 QuadRunner (LT-F250) - FRONT WHEEL BRAKE
1997 QuadRunner (LT-F4WD) - FRONT WHEEL BRAKE
1998 King Quad (LT-F4WDX) - FRONT WHEEL BRAKE
1998 QuadRunner (LT-F250) - FRONT WHEEL BRAKE
1998 QuadRunner (LT-F4WD) - FRONT WHEEL BRAKE
1999-2002 KingQuad 4WD (LT-F300F) - FRONT WHEEL BRAKE (MODEL X/Y/K1)
1999 QuadRunner 2WD (LT-F250) - FRONT WHEEL BRAKE
1999-2002 QuadRunner 4WD (LT-F250F) - FRONT WHEEL BRAKE
2000 QuadRunner 2WD (LT-F250) - FRONT WHEEL BRAKE
2001 QuadRunner 2WD (LT-F250) - FRONT WHEEL BRAKE