1981 Honda CB900C — Maîtres-cylindres et pièces de réfection
Check the installed master cylinder and reservoir before ordering parts for a 1981 CB900C Custom. The front four-screw reservoir kit needs its original diaphragm plate, while front and rear internal repair kits have different references. A replacement aftermarket assembly requires its own component match.
Fit a blacked-out front master cylinder to your late-'70s or early-'80s DOHC CB with this Front Brake Master Cylinder Assembly. Usable on any single...
1969 Honda CB750K Motorcycle Parts1970 Honda CB450K Motorcycle Parts1970 Honda CB750K Motorcycle Parts1971 Honda CB450K Motorcycle Parts1971 Honda CB500K Four Motorcycle Parts1971 Honda CB750K Motorcycle Parts1972 Honda CB350F0 Motorcycle Parts1972 Honda CB450K Motorcycle Parts1972 Honda CB500K Four Motorcycle Parts1972 Honda CB750K Motorcycle Parts1973 Honda CB350F0 Motorcycle Parts1973 Honda CB350G Motorcycle Parts1973 Honda CB450K Motorcycle Parts1973 Honda CB500K Four Motorcycle Parts1973 Honda CB750K Motorcycle Parts1974 Honda CB350F1 Motorcycle Parts1974 Honda CB360G Motorcycle Parts1974 Honda CB360K0 Motorcycle Parts1974 Honda CB450K Motorcycle Parts1974 Honda CB550K Motorcycle Parts1974 Honda CB750K Motorcycle Parts1975 Honda CB360T Motorcycle Parts1975 Honda CB400F Motorcycle Parts1975 Honda CB500T Twin Motorcycle Parts1975 Honda CB550F Supersport Motorcycle Parts1975 Honda CB550K Motorcycle Parts1975 Honda CB750F Motorcycle Parts1975 Honda CB750K Motorcycle Parts1976 Honda CB360T Motorcycle Parts1976 Honda CB400F Motorcycle Parts1976 Honda CB500T Twin Motorcycle Parts1976 Honda CB550F Supersport Motorcycle Parts1976 Honda CB550K Motorcycle Parts1976 Honda CB750A Motorcycle Parts1976 Honda CB750F Motorcycle Parts1976 Honda CB750K Motorcycle Parts1977 Honda CB400F Motorcycle Parts1977 Honda CB550F Supersport Motorcycle Parts1977 Honda CB550K Motorcycle Parts1977 Honda CB750A Motorcycle Parts1977 Honda CB750K Motorcycle Parts1978 Honda CB400A Motorcycle Parts1978 Honda CB400TII Motorcycle Parts1978 Honda CB550K Motorcycle Parts1978 Honda CB750A Motorcycle Parts1978 Honda CB750K Motorcycle Parts1979 Honda CB750F Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1000C Motorcycle Parts1983 Honda CB1100F Motorcycle Parts2002 Honda CB900F 919 Motorcycle Parts2003 Honda CB900F 919 Motorcycle Parts2004 Honda CB900F 919 Motorcycle Parts2005 Honda CB900F 919 Motorcycle Parts2006 Honda CB900F 919 Motorcycle Parts2007 Honda CB900F 919 Motorcycle PartsHonda CB Brake & Clutch PartsHonda CB Brake Master Cylinders & Rebuild KitsHonda CB1000 Motorcycle Parts by Model & YearHonda CB350 Motorcycle Parts by Model & YearHonda CB350F Motorcycle Parts (1972–1974)Honda CB360 Motorcycle Parts by Model & YearHonda CB360T Motorcycle Parts (1975–1976)Honda CB400 Motorcycle Parts by Model & YearHonda CB400F Motorcycle Parts (1975–1977)Honda CB400T Hawk Motorcycle Parts (1978–1981)Honda CB450 Motorcycle Parts by Model & YearHonda CB450K Motorcycle Parts (1965–1974)Honda CB500 Motorcycle Parts by Model & YearHonda CB500K Motorcycle Parts (1971–1973)Honda CB500T Motorcycle Parts (1975–1976)Honda CB550 Motorcycle Parts by Model & YearHonda CB550F Motorcycle Parts (1975–1977)Honda CB550K Motorcycle Parts (1974–1978)Honda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750 SOHC Parts (1969–1978)Honda CB750A Hondamatic Motorcycle Parts (1976–1978)Honda CB750F Motorcycle Parts (1975–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Honda CB900F 919 Motorcycle Parts (2002–2007)Honda CB900F Supersport Motorcycle Parts (1981–1982)Series 4: CB900-1100 (80-83)Series 6: CB500-CB550 (71-78)Series 7: CB400-CB450 (65-86)Series 8: CB350-CB400 (72-77)Series 9: CB350-CB360 (69-75)
Replace a hardened or torn master cylinder diaphragm with this Master Cylinder Reservoir Diaphragm, replacing OEM #45520-300-000. Exceptional range of applications, fits FRONT master...
1979 Honda CB650 Motorcycle Parts1979 Honda CB750F Motorcycle Parts1979 Honda CB750K Motorcycle Parts1979 Honda CB750L Motorcycle Parts1980 Honda CB400TA Motorcycle Parts1980 Honda CB650 Motorcycle Parts1980 Honda CB650C Custom Motorcycle Parts1980 Honda CB750C Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB750K Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB900C Motorcycle PartsHonda CB Brake & Clutch PartsHonda CB Brake Master Cylinders & Rebuild KitsHonda CB400 Motorcycle Parts by Model & YearHonda CB400T Hawk Motorcycle Parts (1978–1981)Honda CB650 Motorcycle Parts (1979–1982)Honda CB650 Motorcycle Parts by Model & YearHonda CB650C Custom Motorcycle Parts (1980–1981)Honda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750C Custom Motorcycle Parts (1980–1982)Honda CB750F Motorcycle Parts (1975–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Series 4: CB900-1100 (80-83)Series 5: CB650 (79-82)Series 7: CB400-CB450 (65-86)
Rebuild your master cylinder reservoir with this Front Master Cylinder Reservoir Rebuild Kit, 4-screw cover type. Includes plastic reservoir, reservoir cap, diaphragm, O-ring, and...
1979 Honda CB750F Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB900C Motorcycle PartsHonda CB Brake & Clutch PartsHonda CB Brake Master Cylinders & Rebuild KitsHonda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750F Motorcycle Parts (1975–1982)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Series 4: CB900-1100 (80-83)
Service your 1979-80 CB750F or CB900C front master cylinder with this Front Master Cylinder Rebuild Kit, replacing OEM #45530-422-305 / #45530-463-305.Key Features• Front master...
1969 Honda CB750K Motorcycle Parts1970 Honda CB450K Motorcycle Parts1970 Honda CB750K Motorcycle Parts1971 Honda CB450K Motorcycle Parts1971 Honda CB500K Four Motorcycle Parts1971 Honda CB750K Motorcycle Parts1972 Honda CB350F0 Motorcycle Parts1972 Honda CB450K Motorcycle Parts1972 Honda CB500K Four Motorcycle Parts1972 Honda CB750K Motorcycle Parts1973 Honda CB350F0 Motorcycle Parts1973 Honda CB450K Motorcycle Parts1973 Honda CB500K Four Motorcycle Parts1973 Honda CB750K Motorcycle Parts1974 Honda CB350F1 Motorcycle Parts1974 Honda CB360G Motorcycle Parts1974 Honda CB360K0 Motorcycle Parts1974 Honda CB450K Motorcycle Parts1974 Honda CB550K Motorcycle Parts1974 Honda CB750K Motorcycle Parts1975 Honda CB360T Motorcycle Parts1975 Honda CB400F Motorcycle Parts1975 Honda CB500T Twin Motorcycle Parts1975 Honda CB550F Supersport Motorcycle Parts1975 Honda CB550K Motorcycle Parts1975 Honda CB750F Motorcycle Parts1975 Honda CB750K Motorcycle Parts1976 Honda CB360T Motorcycle Parts1976 Honda CB400F Motorcycle Parts1976 Honda CB500T Twin Motorcycle Parts1976 Honda CB550F Supersport Motorcycle Parts1976 Honda CB550K Motorcycle Parts1976 Honda CB750A Motorcycle Parts1976 Honda CB750F Motorcycle Parts1976 Honda CB750K Motorcycle Parts1977 Honda CB400F Motorcycle Parts1977 Honda CB550F Supersport Motorcycle Parts1977 Honda CB550K Motorcycle Parts1977 Honda CB750A Motorcycle Parts1977 Honda CB750F Motorcycle Parts1977 Honda CB750K Motorcycle Parts1978 Honda CB400A Motorcycle Parts1978 Honda CB400TII Motorcycle Parts1978 Honda CB550K Motorcycle Parts1978 Honda CB750A Motorcycle Parts1978 Honda CB750F Motorcycle Parts1978 Honda CB750K Motorcycle Parts1979 Honda CB750F Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1000C Motorcycle Parts1994 Honda CB1000 Motorcycle Parts2002 Honda CB900F 919 Motorcycle Parts2003 Honda CB900F 919 Motorcycle Parts2004 Honda CB900F 919 Motorcycle Parts2005 Honda CB900F 919 Motorcycle Parts2006 Honda CB900F 919 Motorcycle Parts2007 Honda CB900F 919 Motorcycle PartsHonda CB Brake & Clutch PartsHonda CB Brake Master Cylinders & Rebuild KitsHonda CB1000 Motorcycle Parts by Model & YearHonda CB350 Motorcycle Parts by Model & YearHonda CB350F Motorcycle Parts (1972–1974)Honda CB360 Motorcycle Parts by Model & YearHonda CB360T Motorcycle Parts (1975–1976)Honda CB400 Motorcycle Parts by Model & YearHonda CB400F Motorcycle Parts (1975–1977)Honda CB400T Hawk Motorcycle Parts (1978–1981)Honda CB450 Motorcycle Parts by Model & YearHonda CB450K Motorcycle Parts (1965–1974)Honda CB500 Motorcycle Parts by Model & YearHonda CB500K Motorcycle Parts (1971–1973)Honda CB500T Motorcycle Parts (1975–1976)Honda CB550 Motorcycle Parts by Model & YearHonda CB550F Motorcycle Parts (1975–1977)Honda CB550K Motorcycle Parts (1974–1978)Honda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750 SOHC Parts (1969–1978)Honda CB750A Hondamatic Motorcycle Parts (1976–1978)Honda CB750F Motorcycle Parts (1975–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Honda CB900F 919 Motorcycle Parts (2002–2007)Honda CB900F Supersport Motorcycle Parts (1981–1982)Series 4: CB900-1100 (80-83)Series 6: CB500-CB550 (71-78)Series 7: CB400-CB450 (65-86)Series 8: CB350-CB400 (72-77)Series 9: CB350-CB360 (69-75)
Replace your master cylinder cap O-ring with this Master Cylinder Reservoir Cap Plastic O-Ring, replacing OEM #45521-MJ6-006.Key Features• Master cylinder reservoir cap O-ring• Plastic•...
1979 Honda CB400TIIZ Motorcycle Parts1979 Honda CB650 Motorcycle Parts1979 Honda CB750F Motorcycle Parts1979 Honda CB750K Motorcycle Parts1979 Honda CB750L Motorcycle Parts1980 Honda CB400TA Motorcycle Parts1980 Honda CB650 Motorcycle Parts1980 Honda CB650C Custom Motorcycle Parts1980 Honda CB750C Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB750K Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB900C Motorcycle PartsHonda CB Brake & Clutch PartsHonda CB Brake Master Cylinders & Rebuild KitsHonda CB400 Motorcycle Parts by Model & YearHonda CB400T Hawk Motorcycle Parts (1978–1981)Honda CB650 Motorcycle Parts (1979–1982)Honda CB650 Motorcycle Parts by Model & YearHonda CB650C Custom Motorcycle Parts (1980–1981)Honda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750C Custom Motorcycle Parts (1980–1982)Honda CB750F Motorcycle Parts (1975–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Series 4: CB900-1100 (80-83)Series 5: CB650 (79-82)Series 7: CB400-CB450 (65-86)
Replace the diaphragm on your early DOHC CB's front master cylinder reservoir with this Front Master Cylinder Reservoir Diaphragm, replacing OEM #45520-422-026 / #45520-422-006...
1969 Honda CB750K Motorcycle Parts1970 Honda CB450K Motorcycle Parts1970 Honda CB750K Motorcycle Parts1971 Honda CB450K Motorcycle Parts1971 Honda CB500K Four Motorcycle Parts1971 Honda CB750K Motorcycle Parts1972 Honda CB350F0 Motorcycle Parts1972 Honda CB450K Motorcycle Parts1972 Honda CB500K Four Motorcycle Parts1972 Honda CB750K Motorcycle Parts1973 Honda CB350F0 Motorcycle Parts1973 Honda CB450K Motorcycle Parts1973 Honda CB500K Four Motorcycle Parts1973 Honda CB750K Motorcycle Parts1974 Honda CB350F1 Motorcycle Parts1974 Honda CB450K Motorcycle Parts1974 Honda CB550K Motorcycle Parts1974 Honda CB750K Motorcycle Parts1975 Honda CB360T Motorcycle Parts1975 Honda CB400F Motorcycle Parts1975 Honda CB500T Twin Motorcycle Parts1975 Honda CB550F Supersport Motorcycle Parts1975 Honda CB550K Motorcycle Parts1975 Honda CB750F Motorcycle Parts1975 Honda CB750K Motorcycle Parts1976 Honda CB360T Motorcycle Parts1976 Honda CB400F Motorcycle Parts1976 Honda CB500T Twin Motorcycle Parts1976 Honda CB550F Supersport Motorcycle Parts1976 Honda CB550K Motorcycle Parts1976 Honda CB750A Motorcycle Parts1976 Honda CB750F Motorcycle Parts1976 Honda CB750K Motorcycle Parts1976 Honda CB750P Motorcycle Parts1977 Honda CB400F Motorcycle Parts1977 Honda CB550F Supersport Motorcycle Parts1977 Honda CB550K Motorcycle Parts1977 Honda CB750A Motorcycle Parts1977 Honda CB750F Motorcycle Parts1977 Honda CB750K Motorcycle Parts1978 Honda CB400A Motorcycle Parts1978 Honda CB400TII Motorcycle Parts1978 Honda CB550K Motorcycle Parts1978 Honda CB750A Motorcycle Parts1978 Honda CB750F Motorcycle Parts1978 Honda CB750K Motorcycle Parts1978 Honda CB750P Motorcycle Parts1979 Honda CB750F Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1000C Motorcycle Parts1983 Honda CB1100F Motorcycle PartsHonda CB Brake & Clutch PartsHonda CB Brake Master Cylinders & Rebuild KitsHonda CB1000 Motorcycle Parts by Model & YearHonda CB350 Motorcycle Parts by Model & YearHonda CB350F Motorcycle Parts (1972–1974)Honda CB360 Motorcycle Parts by Model & YearHonda CB360T Motorcycle Parts (1975–1976)Honda CB400 Motorcycle Parts by Model & YearHonda CB400F Motorcycle Parts (1975–1977)Honda CB400T Hawk Motorcycle Parts (1978–1981)Honda CB450 Motorcycle Parts by Model & YearHonda CB450K Motorcycle Parts (1965–1974)Honda CB500 Motorcycle Parts by Model & YearHonda CB500K Motorcycle Parts (1971–1973)Honda CB500T Motorcycle Parts (1975–1976)Honda CB550 Motorcycle Parts by Model & YearHonda CB550F Motorcycle Parts (1975–1977)Honda CB550K Motorcycle Parts (1974–1978)Honda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750 SOHC Parts (1969–1978)Honda CB750A Hondamatic Motorcycle Parts (1976–1978)Honda CB750F Motorcycle Parts (1975–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB750P Police Motorcycle Parts (1976, 1978–1980)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Honda CB900F Supersport Motorcycle Parts (1981–1982)Series 4: CB900-1100 (80-83)Series 6: CB500-CB550 (71-78)Series 7: CB400-CB450 (65-86)Series 8: CB350-CB400 (72-77)Series 9: CB350-CB360 (69-75)
Restore your master cylinder cap with this Master Cylinder Cap with Plastic O-Ring, replacing OEM #45513-341-771. This original style was discontinued long ago by...
Replace the brake lever specifically on the #08-0457 Master Cylinder (sold separately) with this Brake Lever.Important: this lever is ONLY for Master Cylinder #08-0457,...
1969 Honda CB750K Motorcycle Parts1970 Honda CB450K Motorcycle Parts1970 Honda CB750K Motorcycle Parts1971 Honda CB450K Motorcycle Parts1971 Honda CB500K Four Motorcycle Parts1971 Honda CB750K Motorcycle Parts1972 Honda CB350F0 Motorcycle Parts1972 Honda CB450K Motorcycle Parts1972 Honda CB500K Four Motorcycle Parts1972 Honda CB750K Motorcycle Parts1973 Honda CB350F0 Motorcycle Parts1973 Honda CB350G Motorcycle Parts1973 Honda CB450K Motorcycle Parts1973 Honda CB500K Four Motorcycle Parts1973 Honda CB750K Motorcycle Parts1974 Honda CB350F1 Motorcycle Parts1974 Honda CB360G Motorcycle Parts1974 Honda CB360K0 Motorcycle Parts1974 Honda CB450K Motorcycle Parts1974 Honda CB550K Motorcycle Parts1974 Honda CB750K Motorcycle Parts1975 Honda CB360T Motorcycle Parts1975 Honda CB400F Motorcycle Parts1975 Honda CB500T Twin Motorcycle Parts1975 Honda CB550F Supersport Motorcycle Parts1975 Honda CB550K Motorcycle Parts1975 Honda CB750F Motorcycle Parts1975 Honda CB750K Motorcycle Parts1976 Honda CB360T Motorcycle Parts1976 Honda CB400F Motorcycle Parts1976 Honda CB500T Twin Motorcycle Parts1976 Honda CB550F Supersport Motorcycle Parts1976 Honda CB550K Motorcycle Parts1976 Honda CB750A Motorcycle Parts1976 Honda CB750F Motorcycle Parts1976 Honda CB750K Motorcycle Parts1977 Honda CB400F Motorcycle Parts1977 Honda CB550F Supersport Motorcycle Parts1977 Honda CB550K Motorcycle Parts1977 Honda CB750A Motorcycle Parts1977 Honda CB750F Motorcycle Parts1977 Honda CB750K Motorcycle Parts1978 Honda CB400A Motorcycle Parts1978 Honda CB400TII Motorcycle Parts1978 Honda CB550K Motorcycle Parts1978 Honda CB750A Motorcycle Parts1978 Honda CB750F Motorcycle Parts1978 Honda CB750K Motorcycle Parts1979 Honda CB750F Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1000C Motorcycle Parts1983 Honda CB1100F Motorcycle PartsHonda CB Brake & Clutch PartsHonda CB Brake Master Cylinders & Rebuild KitsHonda CB1000 Motorcycle Parts by Model & YearHonda CB350 Motorcycle Parts by Model & YearHonda CB350F Motorcycle Parts (1972–1974)Honda CB360 Motorcycle Parts by Model & YearHonda CB360T Motorcycle Parts (1975–1976)Honda CB400 Motorcycle Parts by Model & YearHonda CB400F Motorcycle Parts (1975–1977)Honda CB400T Hawk Motorcycle Parts (1978–1981)Honda CB450 Motorcycle Parts by Model & YearHonda CB450K Motorcycle Parts (1965–1974)Honda CB500 Motorcycle Parts by Model & YearHonda CB500K Motorcycle Parts (1971–1973)Honda CB500T Motorcycle Parts (1975–1976)Honda CB550 Motorcycle Parts by Model & YearHonda CB550F Motorcycle Parts (1975–1977)Honda CB550K Motorcycle Parts (1974–1978)Honda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750 SOHC Parts (1969–1978)Honda CB750A Hondamatic Motorcycle Parts (1976–1978)Honda CB750F Motorcycle Parts (1975–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Honda CB900F Supersport Motorcycle Parts (1981–1982)Series 4: CB900-1100 (80-83)Series 6: CB500-CB550 (71-78)Series 7: CB400-CB450 (65-86)Series 8: CB350-CB400 (72-77)Series 9: CB350-CB360 (69-75)
Replace your master cylinder reservoir cap with this Master Cylinder Reservoir Cap with Diaphragm, round OEM thread-on type. Cap replaces OEM #43513-MJ6-006, diaphragm replaces...
Step up to dual-disk compatibility with this Magura Universal Front Brake Master Cylinder, featuring a 16mm piston diameter recommended for dual-disk brake systems. Threaded...
1981 Honda CB900C Custom · Master Cylinder Service Buying guide
Locate the leak and identify the master cylinder
A damaged reservoir, leaking cap and worn internal master-cylinder components require different parts. Check where the fault occurs and whether the installed unit is still the original Honda type.
The listed front reservoir is the four-screw style. Its kit requires reuse of the original diaphragm plate, so inspect and retain that plate during disassembly. A reservoir kit does not replace the internal piston and seals. A new diaphragm also cannot repair a cracked reservoir or damaged cap sealing surface.
Keep the hydraulic applications distinct
For this year, the front rebuild references are 45530-422-305 or 45530-463-305; the rear reference is 43520-461-771. Match the actual casting and assembly, especially if controls have been changed. Follow the service manual for rebuilding, bleeding and checking full brake release.
Practical questions
Will a reservoir kit cure a soft or sinking lever?
Only if the diagnosed fault is in the reservoir assembly. Air, leaks and internal hydraulic faults need separate checks. Do not assume replacing the cap, plastic reservoir or diaphragm will restore pressure.
Can the Honda rebuild kit be used in an aftermarket master cylinder?
Not from the motorcycle’s model year alone. Identify the installed master cylinder and use its maker’s repair specification; piston and seal dimensions may differ.
What else should I inspect when replacing a leaking diaphragm?
Check the cap, reservoir rim and other sealing parts for cracks or distortion. On the four-screw kit, the original diaphragm plate must be reusable.
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