VintageCB750 Supplying CB Riders Since 2010

About Us Why Us? Reviews Shipping Info Returns Contact Us
Wish Lists
0 My Cart

Your cart is currently empty.

Browse all parts
Total (USD): $0.00
View cart
Menu
Search
Wish
Cart 0
My motorcycle Choose your Honda CB model

Search parts

Searching all Honda CB parts

Example: brake pads or oil filter.

1986 Honda CB700SC Exhaust-Port Sealing Parts

The headpipe-gasket options for the 1986 CB700SC share overlapping references and are sold as single pieces. Choose them for the cylinder-head exhaust joint, then count the quantity needed. If material or dimensional differences matter, compare the current specifications before deciding between the listings.

Close ×
Your saved bike Choose your Honda CB model

Shop By Category

Most orders ship same or next business day Fitment guarantee Listed for your exact model and year? We’ll make it right if it doesn’t fit as described. Mechanic-backed support Ask our team for help choosing the right Honda CB part.
Currently viewing Gaskets & Mounting Hardware

Honda motorcycle parts

Choose your model and year to see parts listed for your bike.

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....
Sold out
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...
compare

1986 Honda CB700SC · Exhaust-Port Sealing Parts Buying guide

Compare the headpipe gasket reference and order quantity

Both choices cover the listed cylinder-head sealing application. Use the actual joint and current specification to choose, rather than assuming the two listings use different materials or fit different joints.

Parts to consider

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18291-MM5-860 Headpipe gasketOne cylinder-head-to-headpipe gasket, replacing reference 18291-MM5-860.View part Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18291-254-000 Exhaust-port gasketSold as one gasket; references 18291-254-000 and 18291-MM5-860.View part

Use the single-piece sale unit

Each selected listing supplies one gasket. Resealing all four CB700SC cylinder-head exhaust ports therefore requires four individual pieces. If only some joints are disturbed, order for those locations and inspect the sealing faces and mounting hardware before assembly.

Ask about a specification that matters

The two listed applications and references overlap. If the repair calls for a particular material or dimension, check that requirement against the current product specification before buying. The catalog entry alone should not be used to infer an unlisted construction difference.

Buying questions

Can an old exhaust-port gasket be left in place under a new one?

No. The replacement guidance calls for removal of the old crush gasket from the disturbed port before installing a fresh one. Check the seat carefully rather than stacking another gasket on top of an old compressed seal.

Do the two Honda references identify different exhaust-joint locations?

Both selected products cover the CB700SC cylinder-head-to-headpipe joint and share reference 18291-MM5-860; one also lists 18291-254-000. The extra reference does not make that item a collector or muffler-joint gasket, or prove a different material.

What should I check for an aftermarket headpipe?

Use the headpipe maker’s sealing requirement and compare the actual cylinder-head connection. Keep any collector or muffler joint requirements separate from this headpipe-gasket application.

Not sure which part you need?

Send your model and year, plus photos of your existing part and any changes to the original setup.

Ask a fitment question
Parts categories for 1986 Honda CB700SC

Your cart

×