CB450 Air / Fuel Screw

cellomaster

cellomaster

Well-known Member
Joined
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Location
Tulsa, OK
Hey y'all,

I have stock carbs on my CB450, with these air / fuel screws currently installed. I don't think they are stock, and would like to put the correct screws in them. Does anyone have any laying around?

PXL_20260227_015247515.jpg
 
Yours looks correct, can't tell for sure if it's OEM. Others here may know for sure. The fuel/air screws in my CL450 K6 carbs are aluminum, not brass, are stepped like yours (not tapered like some replacements) have a tiny aluminum washer between the o ring and spring. So, I'm not sure if mine are OEM or not. The OEM complete set may still be available from Honda, listed as Screw Set A in the carburetor diagrams

HONDA OEM SCREW SET A | 16016-346-004 (check to be sure it's for your model year)​

and the washers alone are available from 4into1 as a pack.

Carburetor Tuning And Air Mixture Screw Washer - 50 Pack​

4into1.com

Parts and accessories for vintage Honda motorcycles from the 60's, 70's & 80's.
4into1.com 4into1.com
 
Last edited:
Where did you get that image? It doesn't look like either the early or late style for the dohc 450.

Possibly sohc 450 of the 80's? Edit : Yeah, it looks like your image shows the screw for an 80's sohc 450.

You should be fine with the one you have.
 
stl360+450 said:
Where did you get that image? It doesn't look like either the early or late style for the dohc 450.

Possibly sohc 450 of the 80's? Edit : Yeah, it looks like your image shows the screw for an 80's sohc 450.

You should be fine with the one you have.
Click to expand...
Just google... Perfect, thank you!!
 
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CORRECTION:
I just opened the package and tried the air mixture washers from 4 into 1....they do NOT fit the CL450 fuel/air screws as they are too small..I hadn't tried them before responding to cellomaster...sorry about that...
So it looks like you'd have to order the OEM screw set to get the proper size washers...


GMX said:
Yours looks correct, can't tell for sure if it's OEM. Others here may know for sure. The fuel/air screws in my CL450 K6 carbs are aluminum, not brass, are stepped like yours (not tapered like some replacements) have a tiny aluminum washer between the o ring and spring. So, I'm not sure if mine are OEM or not. The OEM complete set may still be available from Honda, listed as Screw Set A in the carburetor diagrams

HONDA OEM SCREW SET A | 16016-346-004 (check to be sure it's for your model year)​

and the washers alone are available from 4into1 as a pack.

Carburetor Tuning And Air Mixture Screw Washer - 50 Pack​

4into1.com

Parts and accessories for vintage Honda motorcycles from the 60's, 70's & 80's.
4into1.com 4into1.com
Click to expand...
 
I looked through some of my stash today and found one washer in a baggie with a few later-style dohc CB450 mixture screws. It has an ID around 3.5mm and an OD of about 5.8mm. It seems to match the washer size found in a recently purchased aftermarket rebuild kit for the CB350.

The bulk washers from 4-into-1 have an ID of 3mm and an OD of 5.1mm, so it makes sense that they are too small.

However, 4-into-1 does seem to include the screw, washer, and o-ring in their carb kit for the 450. The OEM parts are also available at CMSNL.
 
RobMan said:
Are you sure you have the original carburetors on the bike? I had a correct 723A and a not correct 14H on my K5 where the PO had swapped it out. A lot can happen in 50 years.
Click to expand...
Hmm, im 99% sure I do, but I will check and make sure.

stl360+450 said:
However, 4-into-1 does seem to include the screw, washer, and o-ring in their carb kit for the 450.
Click to expand...
I bought this kit, and couldn't find them...only the rubber washer. Ill check back through my stash too and see if I just missed them.

Thanks!
 
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