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1985 Honda CB700SC — Alimentation en carburant

Find the source of a fuel-system problem before ordering for the 1985 CB700SC. A leaking bowl drain, worn float component and petcock fault call for different parts. Match the carburetors and valve actually fitted, then count kits according to the repair being undertaken.

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Consultation en cours Alimentation en carburant

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Honda CB throttle sleeve 53141-300-010

Honda CB Throttle Sleeve ~ Replaces 53141-300-010

$9.95 USD
02-2462
Refresh the throttle feel on your Honda with this Nylon Throttle Sleeve, a replacement for OEM Ref. #53141-300-010 with exceptionally broad fitment across the...
Honda CB1000 CB900 CB750 CB700 ultimate performance main jet kit

Honda CB1000 / CB900 / CB750 / CB700 Ultimate Performance Main Jet Kit

$64.95 USD
48-2112
Cover every tuning scenario with this Ultimate Performance Main Jet Kit. Includes a total of 44 main jets for Keihin carbs. Use this jet...
Honda CB1100 CB1000 CB900 CB750 CB700 carb float needle 16155-413-751

Honda CB Carb Float Needle ~ Replaces 16155-413-751

$8.95 USD
48-5011
Replace your DOHC CB float needle (only) with this Float Needle, replacing OEM #16155-413-751.Key Features• Float needle (only)• Replaces OEM #16155-413-751• Honda part name:...
Honda CB1100 CB1000 CB900 CB750 float bowl drain screw o-rings pk 4

Honda CB Float Bowl Drain Screw O-Rings Pk/4

$5.80 USD
48-0792
Replace your float bowl drain screw O-rings with this Float Bowl Drain Screw O-Rings 4-Pack.Key Features• Float bowl drain screw O-rings• 4 per packFitment...
Honda CB1100 CB1000 CB900 CB750 float bowl drain screw -a

Honda CB Stock Type Float Bowl Drain Screw ~-A

$6.50 USD
48-5042
Small part, but an important one. This float bowl drain screw with included O-ring allows you to properly drain the carburetor bowl without leaks,...
Honda CB1100 CB1000 CB900 CB750 float bowl drain screw

Honda CB Stock Type Float Bowl Drain Screw

$6.50 USD
48-5042
Replace your stock-type float bowl drain screw with this Float Bowl Drain Screw with O-Ring for the later DOHC and Nighthawk lineup.Note: sold each,...
Honda CB1000 CB900 CB750 pilot jet set size 35 (pk 4) 99103-GY6-0350

Honda CB Pilot Jet Set ~ Size #35 (Pk/4) ~ Replaces 99103-GY6-0350

$14.95 USD
73-1004
Refresh your low-speed performance with this Pilot Jet Set of 4 in size #35, replacing OEM #99103-GY6-0350.Pilot jets handle your idle and low-speed operation...
Honda CB700SC carb rebuild kit

1984-85 Honda CB700SC Carb Rebuild Kit

$22.95 USD
73-0830
Rebuild a CB700SC carburetor with this Carb Rebuild Kit. Contains: float bowl gasket, needle, and 8 O-rings. Made in Japan.Note: each kit rebuilds one...
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Honda CB700SC CB650SC CB550SC carb float 16013-KR3-980

Honda Nighthawk Carb Float with Pin ~ Replaces 16013-KR3-980

$19.95 USD
07-4650
Rebuild your Nighthawk's carburetor with this Carb Float with Pin, replacing OEM #16013-KR3-980 / #16013-MA6-003. A critical float for proper fuel metering on the...
Honda CB front fuel tank rubber cushion 17611-KE8-000

Front Fuel Tank Rubber Cushion ~ Replaces Honda OEM 17611-KE8-000

$5.50 USD
27-5520
This aftermarket front fuel tank rubber cushion replaces Honda OEM 17611-KE8-000 on the listed Honda CB-series applications. It mounts to the frame and supports...
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Honda CB700 CB650 CB550 CB450 fuel petcock repair kit

Honda CB700 / CB650 / CB550 / CB450 Fuel Petcock Repair Kit

$27.95 USD
20-0020
Rebuild your Nighthawk fuel petcock with this Fuel Petcock Repair Kit. Includes a diaphragm, spring, and 2 O-rings.Key Features• Fuel petcock repair kit• Includes...
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Honda CB700 CB650 CB550 fuel tank front rubber cushion 17611-KE8-000

Honda CB Genuine Honda 17611-KE8-000 Fuel Tank Front Rubber Cushion ~ Replaces 17611-KE8-000

$17.95 USD
99-5145
This genuine Honda front fuel tank rubber cushion mounts to the frame and supports the front of the gas tank on select classic Honda...
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1985 Honda CB700SC · Fuel & Carburetor Parts Buying guide

Trace fuel delivery before buying carburetor parts

The 1985 CB700SC uses four carburetors and a vacuum-operated fuel valve. A supply restriction at the tank, a worn float valve and a leaking bowl drain can produce different faults. Follow the fuel path before choosing a petcock kit, float or carburetor sealing parts.

Parts to consider

Honda CB700 / CB650 / CB550 / CB450 Fuel Petcock Repair Kit Fuel-petcock repair kitContains a diaphragm, spring and two O-rings for the listed Nighthawk petcock.Voir la pièce 1984-85 Honda CB700SC Carb Rebuild Kit Single-carburetor rebuild kitOne kit contains a float-bowl gasket, needle and eight O-rings; it rebuilds one carburetor.Voir la pièce Honda Nighthawk Carb Float with Pin ~ Replaces 16013-KR3-980 Carburetor float with pinFloat and pin replacing references 16013-KR3-980 and 16013-MA6-003.Voir la pièce

Start with the tank valve and strainers

The original petcock opens its fuel passage when vacuum is applied. No flow with the engine stopped and the lever ON does not by itself establish a fault. Honda tests the diaphragm with a hand vacuum pump and checks the strainers when flow is restricted. The selected kit supplies a diaphragm, spring and two O-rings; it does not replace a damaged valve body or establish that the strainers are clear.

Check float level before changing fuel metering

Honda gives an 18.5 mm float-level specification, measured with the float tang just contacting the valve, and instructs replacement of an out-of-specification float assembly. Inspect the valve for grooves or nicks as well. A float comes with its pivot pin; the separate float needle and the metering jets perform different jobs. After carburetor work, check throttle and choke adjustment, synchronization and idle speed.

Buying questions

Why is there no fuel flow with the original petcock turned ON?

The valve is vacuum operated, so ON alone does not open its diaphragm. Check it using Honda’s hand-pump test and inspect the supply and strainers if flow remains restricted. Conversely, fuel flowing through the disconnected outlet without applied vacuum calls for diaphragm inspection.

Should I bend the float tang to correct an incorrect fuel level?

Honda specifies checking 18.5 mm with the tang just contacting the float valve, then replacing the float assembly if it is outside specification. The CB700SC procedure does not call for bending the tang. Also inspect the mating valve and seat rather than assuming the float alone causes the problem.

Does a one-carb rebuild kit include everything needed for the whole rack?

No. The listed 1984–85 kit contains one bowl gasket, a needle and eight O-rings for one carburetor. Four kits are needed for all four carburetors, but floats, jets and other unlisted components remain separate decisions. Check actual wear and package contents before building the order.

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