The 1981 CB900F exhaust-service choices include cylinder-head port gaskets, a separate muffler-joint gasket and replacement stud hardware. Identify the joint being opened and the fitted exhaust arrangement before ordering. A modified header or muffler may need a different connection from the original-style application.
Replace one exhaust port gasket on your CB750 or big-bore DOHC CB with this Exhaust Port Gasket, 1 piece, replacing OEM #18291-254-000 / #18291-MM5-860....
1967 Honda CL450K0 Motorcycle Parts1968 Honda CB350K0 Motorcycle Parts1969 Honda CB175K3 Motorcycle Parts1969 Honda CB750K Motorcycle Parts1969 Honda CL450K2 Motorcycle Parts1970 Honda CB100K0 Motorcycle Parts1970 Honda CB175K4 Motorcycle Parts1970 Honda CB350K2 Motorcycle Parts1970 Honda CB450K Motorcycle Parts1970 Honda CB750K Motorcycle Parts1970 Honda SL350K0 Motorcycle Parts1971 Honda CB100K1 Motorcycle Parts1971 Honda CB175K1 Motorcycle Parts1971 Honda CB350K3 Motorcycle Parts1971 Honda CB450K Motorcycle Parts1971 Honda CB500K Four Motorcycle Parts1971 Honda CB750K Motorcycle Parts1972 Honda CB100K2 Motorcycle Parts1972 Honda CB175K6 Motorcycle Parts1972 Honda CB350K4 Motorcycle Parts1972 Honda CB450K Motorcycle Parts1972 Honda CB500K Four Motorcycle Parts1972 Honda CB750K Motorcycle Parts1973 Honda CB125S0 Motorcycle Parts1973 Honda CB175K7 Motorcycle Parts1973 Honda CB350G Motorcycle Parts1973 Honda CB500K Four Motorcycle Parts1973 Honda CB750K Motorcycle Parts1974 Honda CB125S1 Motorcycle Parts1974 Honda CB200 Motorcycle Parts1974 Honda CB550K Motorcycle Parts1974 Honda CB750K Motorcycle Parts1974 Honda CL360K0 Motorcycle Parts1975 Honda CB125S2 Motorcycle Parts1975 Honda CB200T Motorcycle Parts1975 Honda CB400F Motorcycle Parts1975 Honda CB500T Twin Motorcycle Parts1975 Honda CB550F Supersport Motorcycle Parts1975 Honda CB550K Motorcycle Parts1975 Honda CB750K Motorcycle Parts1975 Honda CL360K1 Motorcycle Parts1976 Honda CB200TK0 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 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 CB550K Motorcycle Parts1978 Honda CB750A Motorcycle Parts1978 Honda CB750F Motorcycle Parts1978 Honda CB750K Motorcycle Parts1979 Honda CB650 Motorcycle Parts1979 Honda CB750F Motorcycle Parts1979 Honda CB750K Motorcycle Parts1979 Honda CB750L Motorcycle Parts1980 Honda CB650 Motorcycle Parts1980 Honda CB650C Custom Motorcycle Parts1980 Honda CB750F Motorcycle Parts1980 Honda CB750K Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB650 Motorcycle Parts1981 Honda CB650C Custom Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB750K Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB650 Motorcycle Parts1982 Honda CB650SC Nighthawk Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB750K Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1100F Motorcycle Parts1994 Honda CB1000 Motorcycle Parts1995 Honda CB1000 Motorcycle PartsHonda CB Exhaust Gaskets & Mounting HardwareHonda CB Exhaust Systems, Mufflers & HardwareHonda CB Foot Pegs, Shifters, Kickstarters & StandsHonda CB Frame & Body PartsHonda CB Rubber Components & Mounting DampersHonda CB100 Motorcycle Parts by Model & YearHonda CB1000 Motorcycle Parts by Model & YearHonda CB100K Motorcycle Parts (1970–1972)Honda CB125 Motorcycle Parts by Model & YearHonda CB125S Motorcycle Parts (1973–1985)Honda CB175K Motorcycle Parts (1969–1973)Honda CB200 Motorcycle Parts by Model & YearHonda CB200T / CB200TK0 Motorcycle Parts (1975–1976)Honda CB350 Motorcycle Parts by Model & YearHonda CB350K Motorcycle Parts (1968–1972)Honda CB400 Motorcycle Parts by Model & YearHonda CB400F Motorcycle Parts (1975–1977)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 CB650 Motorcycle Parts (1979–1982)Honda CB650 Motorcycle Parts by Model & YearHonda CB650C Custom Motorcycle Parts (1980–1981)Honda CB650SC Nighthawk Motorcycle Parts (1982–1985)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)Honda CL360K Motorcycle Parts (1974–1975)Honda CL450K Motorcycle Parts (1967–1974)Honda SL350K Motorcycle Parts (1969–1973)Series 10: CB72-CB250 (59-85)Series 4: CB900-1100 (80-83)Series 5: CB650 (79-82)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 worn kick stand stopper with this Kick Stand Stopper Rubber "A", a direct replacement for OEM #95011-61000. Exceptionally broad fitment across the...
Replace one cylinder-head-to-exhaust-headpipe gasket on your big-bore Honda with this Cylinder Head to Exhaust Headpipe Gasket, 1 piece, replacing OEM #18291-MM5-860. Exceptionally broad fitment...
1979 Honda CB750K Motorcycle Parts1980 Honda CB750K Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB750K Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB750K Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle PartsHonda CB Exhaust Gaskets & Mounting HardwareHonda CB Exhaust Systems, Mufflers & HardwareHonda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda 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)
Restore your classic Honda’s exhaust system with this premium Exhaust Stud Set, engineered for durability and a precise fit. This 8-piece kit includes eight...
1979 Honda CB750K Motorcycle Parts1979 Honda CB750L Motorcycle Parts1980 Honda CB750C Motorcycle Parts1980 Honda CB750K Motorcycle Parts1980 Honda CB900C Motorcycle Parts1981 Honda CB750C Motorcycle Parts1981 Honda CB750K Motorcycle Parts1981 Honda CB900C Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB750C Motorcycle Parts1982 Honda CB750K Motorcycle Parts1982 Honda CB750SC Motorcycle Parts1982 Honda CB900C Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1000C Motorcycle Parts1983 Honda CB1100F Motorcycle Parts1983 Honda CB750SC Motorcycle PartsHonda CB Exhaust Systems, Mufflers & HardwareHonda CB Mufflers, Baffles & Exhaust PackingHonda CB1000 Motorcycle Parts by Model & YearHonda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750C Custom Motorcycle Parts (1980–1982)Honda CB750K Motorcycle Parts (1969–1982)Honda CB750SC Nighthawk Motorcycle Parts (1982–1986)Honda CB900 Motorcycle Parts by Model & YearHonda CB900C Custom Motorcycle Parts (1980–1982)Honda CB900F Supersport Motorcycle Parts (1981–1982)Series 3: CB700-750SC (82-86)Series 4: CB900-1100 (80-83)
Upgrade or restore your classic Honda motorcycle with this Exhaust Pipe Joint Collar — precision‑engineered and made in Japan. This genuine OEM part #18233‑425‑000...
1979 Honda CB750F Motorcycle Parts1980 Honda CB750F Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1100F Motorcycle PartsHonda CB Exhaust Gaskets & Mounting HardwareHonda CB Exhaust Systems, Mufflers & HardwareHonda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750F Motorcycle Parts (1975–1982)Honda CB900 Motorcycle Parts by Model & YearHonda CB900F Supersport Motorcycle Parts (1981–1982)Series 4: CB900-1100 (80-83)
Replace your DOHC CB's muffler joint gasket with this Muffler Joint Gasket, fitting the 1979-82 CB750F Supersport, 1981-82 CB900F Supersport, and 1983 CB1100F Supersport.Key...
1979 Honda CB750F Motorcycle Parts1980 Honda CB750F Motorcycle Parts1981 Honda CB750F Motorcycle Parts1981 Honda CB900F Motorcycle Parts1982 Honda CB750F Motorcycle Parts1982 Honda CB900F Motorcycle Parts1983 Honda CB1100F Motorcycle PartsHonda CB Exhaust Systems, Mufflers & HardwareHonda CB Mufflers, Baffles & Exhaust PackingHonda CB750 DOHC Parts (1979–1982)Honda CB750 Motorcycle Parts by Model & YearHonda CB750F Motorcycle Parts (1975–1982)Honda CB900 Motorcycle Parts by Model & YearHonda CB900F Supersport Motorcycle Parts (1981–1982)Series 4: CB900-1100 (80-83)
Refresh the back half of your F-Model Supersport exhaust with these Chrome Slip-On Megaphone Mufflers from M.A.C. Designed to bolt onto the factory 4-into-1...
Port gaskets and muffler-joint gaskets seal different exhaust connections. The stud package supplies fastening hardware separately, so plan sealing and mounting needs without assuming one listing covers the entire system.
The port seals and muffler-joint gasket are separate purchases for separate connections. Count the joints disturbed by the repair and compare the fitted parts. The captured 18391-461-000 crossover listing names the 1982 F; its application is not extended to this 1981 guide.
Inspect the mounting before tightening
Check headpipe seating, split collars, studs and the downstream supports before reassembly. Tightening harder will not correct a misaligned system, damaged sealing face or stripped thread. Support the exhaust without forcing it into position and follow the Honda procedure for the actual assembly.
Buying questions
Will a fresh gasket cure every exhaust leak?
Check the joint alignment, sealing faces, clamps and hardware as well as the gasket. A crushed seal, loose joint or damaged stud can require different repairs. Identify whether the leak is at the cylinder head, a muffler joint or another connection before ordering.
Can I stop a leaking headpipe by tightening its nuts further?
Do not use extra force to compensate for misalignment, an incorrectly seated collar or a failed gasket. Inspect the parts and threads, support the system correctly and use the specified tightening procedure. Excess force can damage studs or cylinder-head threads.
Can original-style seals be assumed to fit a replacement exhaust?
Compare the actual joint construction and dimensions with the replacement requirements. An aftermarket header, collector or muffler can change those connections. Model application alone does not verify every modified exhaust, and gasket selection does not establish a jetting recommendation.
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