V-Twin Fluid Level Window for Harley-Davidson Master Cylinder 1982-1987 20101
The V-Twin Fluid Level Window (20101) is a stock OE replacement that provides a clear, at-a-glance indicator for brake fluid level in your Harley-Davidson handlebar master cylinder rebuild. Its transparent, durable design lets you confirm fluid levels without disassembly, saving time during routine maintenance.
Designed for Harley-Davidson master cylinders from 1982 to 1987, including FL and FX series, this window is manufactured in the USA and meets OEM standards. It carries OEM cross reference 45042-82, ensuring compatibility with the original equipment lineage.
Pair this window with the #23-1738 master cylinder rebuild kit for proper integration and optimal brake system function. The kit includes essential accessories to complete a brake system overhaul.
- 41-0194 Spectro Heavy Duty DOT 5 Silicone Brake Fluid
- 8767-10 Handlebar Lever Allen Screw
- 8766-10 Handlebar Switch Housing Allen Screws
Why this matters: maintaining proper brake fluid levels is critical for safe braking performance, and the clear window enables quick checks without removal of components.
Fitment: Harley Davidson FL, FLT, FX, FXD, FXR, FXST, and XL series across model years listed in the product data (1982–2003 range as specified). This makes the V-Twin fluid level window a practical upgrade for vintage restorations or ongoing upkeep.
Fluid level window for handlebar master cylinder rebuild kit. Fluid level window is also stock OE replacement type.
The V-Twin Part Number 20101 master cylinder fluid level window provides a reliable and easy-to-read indicator for your handlebar master cylinder rebuild. Designed as a stock OE replacement, this fluid level window ensures compatibility with a range of Harley Davidson models from 1982 to 1987, including FL and FX series. Crafted in the USA, it meets OEM standards with cross-reference number 45042-82, offering peace of mind for quality and fitment.
The fluid level window is essential for maintaining proper brake fluid levels, which is critical for safe braking performance. Its clear, durable construction allows for quick visual checks without dismantling components, saving time during routine maintenance. This component is recommended for use with the #23-1738 master cylinder rebuild kit, ensuring proper integration and optimal brake system function.
Included in your purchase are accessory items such as Spectro Heavy Duty DOT 5 Silicone Brake Fluid, handlebar lever screws, and handlebar switch housing screws, making this kit a comprehensive solution for your brake system overhaul. Whether you’re restoring a vintage Harley or performing routine maintenance, the V-Twin fluid level window is a vital upgrade to keep your motorcycle braking smoothly and safely.
Features:
- OEM Cross Reference: 45042-82
- Accessory Items: 41-0194 - Spectro Heavy Duty DOT 5 Silicone Brake Fluid, 8767-10 - Handlebar Lever Allen Screw, 8766-10 - Handlebar Switch Housing Allen Screws Chrome
- Tech Notes: Suggested to use with #23-1738 master cylinder rebuild kit.
Fitment:
Harley Davidson FL 1982
Harley Davidson FL 1983
Harley Davidson FL 1984
Harley Davidson FLST 1986
Harley Davidson FLST 1987
Harley Davidson FLST 1988
Harley Davidson FLST 1989
Harley Davidson FLST 1990
Harley Davidson FLST 1991
Harley Davidson FLST 1992
Harley Davidson FLST 1993
Harley Davidson FLST 1994
Harley Davidson FLST 1995
Harley Davidson FLST 1996
Harley Davidson FLST 1997
Harley Davidson FLST 1998
Harley Davidson FLST 1999
Harley Davidson FLST 2000
Harley Davidson FLST 2001
Harley Davidson FLST 2002
Harley Davidson FLST 2003
Harley Davidson FLT 1982
Harley Davidson FLT 1983
Harley Davidson FLT 1984
Harley Davidson FLT 1985
Harley Davidson FLT 1986
Harley Davidson FLT 1987
Harley Davidson FLT 1988
Harley Davidson FLT 1989
Harley Davidson FLT 1990
Harley Davidson FLT 1991
Harley Davidson FLT 1992
Harley Davidson FLT 1993
Harley Davidson FLT 1994
Harley Davidson FLT 1995
Harley Davidson FLT 1996
Harley Davidson FLT 1997
Harley Davidson FLT 1998
Harley Davidson FLT 1999
Harley Davidson FLT 2000
Harley Davidson FLT 2001
Harley Davidson FLT 2002
Harley Davidson FLT 2003
Harley Davidson FX 1982
Harley Davidson FX 1983
Harley Davidson FX 1984
Harley Davidson FXD 1991
Harley Davidson FXD 1992
Harley Davidson FXD 1993
Harley Davidson FXD 1994
Harley Davidson FXD 1995
Harley Davidson FXD 1996
Harley Davidson FXD 1997
Harley Davidson FXD 1998
Harley Davidson FXD 1999
Harley Davidson FXD 2000
Harley Davidson FXD 2001
Harley Davidson FXD 2002
Harley Davidson FXD 2003
Harley Davidson FXR 1982
Harley Davidson FXR 1983
Harley Davidson FXR 1984
Harley Davidson FXR 1985
Harley Davidson FXR 1986
Harley Davidson FXR 1987
Harley Davidson FXR 1988
Harley Davidson FXR 1989
Harley Davidson FXR 1990
Harley Davidson FXR 1991
Harley Davidson FXR 1992
Harley Davidson FXR 1993
Harley Davidson FXR 1994
Harley Davidson FXST 1984
Harley Davidson FXST 1985
Harley Davidson FXST 1986
Harley Davidson FXST 1987
Harley Davidson FXST 1988
Harley Davidson FXST 1989
Harley Davidson FXST 1990
Harley Davidson FXST 1991
Harley Davidson FXST 1992
Harley Davidson FXST 1993
Harley Davidson FXST 1994
Harley Davidson FXST 1995
Harley Davidson FXST 1996
Harley Davidson FXST 1997
Harley Davidson FXST 1998
Harley Davidson FXST 1999
Harley Davidson FXST 2000
Harley Davidson FXST 2001
Harley Davidson FXST 2002
Harley Davidson FXST 2003
Harley Davidson XL 1982
Harley Davidson XL 1983
Harley Davidson XL 1984
Harley Davidson XL 1985
Harley Davidson XL 1986
Harley Davidson XL 1987
Harley Davidson XL 1988
Harley Davidson XL 1989
Harley Davidson XL 1990
Harley Davidson XL 1991
Harley Davidson XL 1992
Harley Davidson XL 1993
Harley Davidson XL 1994
Harley Davidson XL 1995
Harley Davidson XL 1996
Harley Davidson XL 1997
Harley Davidson XL 1998
Harley Davidson XL 1999
Harley Davidson XL 2000
Harley Davidson XL 2001
Harley Davidson XL 2002
Harley Davidson XL 2003
