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.

1985 Honda CB450SC Nighthawk Intake Joint Repair Package Choices

An intake-joint repair on a 1985 Honda CB450SC Nighthawk can use a new holder assembly or replacement seals at retained holders. Inspect the holders and sealing faces before choosing that order. One new holder includes one O-ring; the separate pack contains four rings, with two used at the listed motorcycle’s head-to-holder joints.

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 Carb Holders, Air Box Rubber Boots, Clamps

Honda motorcycle parts

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

New
Honda CB450 CB400 cylinder head intake boot o-rings (set 4) 91301-371-005

1978-86 Honda CB450 / CB400 Cylinder Head Intake Boot O-Rings (Set/4) ~ Replaces 91301-371-005

$8.19 USD
48-5044
Replace your cylinder head intake boot O-rings with this Cylinder Head Intake Boot O-Rings Set of 4, size 40 x 2.6mm. Replaces OEM #91301-371-005...
Honda CB450 CB400 carb holder with o-ring 16211-447-670

1980-86 Honda CB450 / CB400 Carb Holder with O-Ring ~ Replaces 16211-447-670

$24.95 USD
33-0017
Ensure a secure and reliable connection between the carburetor and intake with this Carb Holder with O-Ring, designed as a direct replacement for the...
compare

1985 Honda CB450SC Nighthawk · Intake Holders & O-Rings Buying guide

Use holder condition to choose assemblies or the separate seal pack

The holder identifies 16211-447-670 / 16211-413-750 and includes a 91325-413-830 replacement seal. The four-ring pack measures 40 x 2.6 mm and references 91301-371-005 / 91325-413-830. Its two-ring motorcycle requirement makes one pack two listed motorcycle sets.

Parts to consider

1980-86 Honda CB450 / CB400 Carb Holder with O-Ring ~ Replaces 16211-447-670 Individual holder with its joint sealOne holder and one O-ring included; two assemblies replace both listed intake connections.View part 1978-86 Honda CB450 / CB400 Cylinder Head Intake Boot O-Rings (Set/4) ~ Replaces 91301-371-005 Four 40 x 2.6 mm cylinder-head joint ringsReferences 91301-371-005 / 91325-413-830; two rings are used per listed motorcycle, giving two sets in one pack.View part

Assess the sealing faces as well as the rubber pieces

The O-ring listing warns that damaged holders or mounting surfaces can leave an air leak after seal renewal. Check the cylinder-head grooves and the holders’ flat sealing faces before choosing a seal-only order. A cracked or hardened holder can point to assembly renewal instead of an additional pack of rings.

Avoid buying the same joint seal twice

A holder assembly already supplies its O-ring. The separate four-ring pack is a different supply format for compatible retained joints, with two used on the listed motorcycle. Decide which joints are receiving new holders and which are receiving only seals, then count the pieces accordingly.

Parts ordering FAQs

How should the included holder seals affect a mixed holder-and-O-ring order?

Count one O-ring already supplied with each new holder. Use the separate 40 x 2.6 mm pack for matching retained-holder joints that need seal renewal. Deciding which connections get assemblies and which get seals alone prevents duplicating the included rings.

How much of the separate ring pack is used for both listed intake joints?

The pack supplies four rings, while the listed two-cylinder applications use two at the head-to-holder joints. Two therefore renew the motorcycle’s pair of joints, leaving another two for a second listed set. Match 91301-371-005 / 91325-413-830 and the stated 40 x 2.6 mm size.

What could make a seal-only order unsuitable for the inspected intake joint?

Cracks, hardening or damaged sealing faces at the holder or mounting surface can leave an air leak even with new rings, according to the listing. Inspect those surfaces and the cylinder-head grooves before choosing seal-only renewal instead of a correctly matched holder assembly.

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 1985 Honda CB450SC Nighthawk

Your cart

×