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1975 Honda CB750F Exhaust Gaskets & Mounting Hardware

Resealing the exhaust on a 1975 Honda CB750F starts here, with two headpipe gasket options, a flange clamp listed for the 1975-78 Supersport and a stud and flange nut set with eight of each. The gaskets and clamps are sold one at a time.

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Honda CB1100 CB1000 CB900 exhaust headpipe gasket (each) 18291-254-000

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18291-254-000

$3.42 USD
17-2812
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....
Honda CB1100 CB1000 CB900 exhaust headpipe gasket (each) 18291-MM5-860

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18291-MM5-860

$6.84 USD
18-7013
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...
Honda CB750F CB750K exhaust stud and flange nut set

1975-78 Honda CB750F / CB750K Exhaust Stud & Flange Nut Set

$34.95 USD
73-1141
Ensure a solid, leak-free seal at your exhaust ports with this Exhaust Stud Set. Includes 8 high-quality studs and 8 flange nuts — everything...
Honda CB750 exhaust flange clamp side detail 18231-392-000

1975-78 Honda CB750 Exhaust Flange Clamp ~ Replaces 18231-392-000

$34.95 USD
07-4622
Rebuild your late-'70s CB750 exhaust with this Stock-Type Exhaust Flange Clamp, replacing OEM #18231-392-000. An essential piece of exhaust mounting hardware for CB750K (1977-78),...
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1975 Honda CB750F · Gaskets & mounting hardware Buying guide

Order sealing parts and hardware separately

Both headpipe-gasket products are sold individually, as are the flange clamps. The stud set contains eight studs and eight flange nuts. Set each quantity from the parts being replaced rather than treating one package as a complete exhaust-joint kit.

Exhaust hardware to consider

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18291-254-000 Headpipe gasketPart 17-2812: one gasket replacing 18291-254-000 and 18291-MM5-860.View part 1975-78 Honda CB750 Exhaust Flange Clamp ~ Replaces 18231-392-000 Exhaust flange clampOne flange clamp, reference 18231-392-000, listed for the 1975–78 CB750F.View part 1975-78 Honda CB750F / CB750K Exhaust Stud & Flange Nut Set Exhaust stud and flange nut setEight exhaust studs and eight flange nuts in one set, part 73-1141.View part

Related parts: Headpipe gasket, part 18-7013

The gasket listings share a Honda reference

Both products name 18291-MM5-860; part 17-2812 also names 18291-254-000. The descriptions do not publish a material or dimensional comparison that establishes one gasket as an upgrade.

Keep package contents and installed quantities separate

The flange-clamp listing specifies four per bike and sells each separately. The stud set packages eight studs with eight flange nuts. Gaskets and flange clamps are separate products, so count the pieces required for the repair before ordering.

Exhaust hardware questions

What should be removed before a new headpipe gasket is fitted?

Remove the old crush gasket from the exhaust port. Use a new gasket whenever the joint is disturbed; do not leave the old gasket in place beneath the replacement.

What should be checked after the headpipes are reassembled?

Seat the headpipes squarely and tighten the flange hardware evenly to the Honda specification. Check for leakage after starting the engine and again after a heat cycle.

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