Maraakate
Veteran Member
DSS. But its probably the same manufacturer for all the vendors who are selling it.
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My 1978 CB400A project
- Thread starter Acrillx
- Start date
Boosted
Veteran Member
That 16010-417-305 kit you photo-linked from eeeBay is incomplete and missing several O-rings and the black plastic kidney-bean shaped part installed under the slide pistons which I see you already have and should not be bought
If the rubber of your 2 air cut off diaphragms is still flexible and neither one has any holes or tears, re-use them. Also re-use your large white plastic "stopper" rings unless you break one or both during cleaning.
In another of your photos above I see O-rings mistakenly put on 2 of your brass main jets (#72 or #105)...
I strongly suggest that you spend significant time during the next week or two reading thru many of the "sticky" (permanent) threads in the SOHC sub-forum here titled Carburetion & Fuel where you'll learn a lot more of what you need to learn just like I and most others have...
the last 2 photos you shared I see are from 4into1 website which is a good source for your carbs needs
If the rubber of your 2 air cut off diaphragms is still flexible and neither one has any holes or tears, re-use them. Also re-use your large white plastic "stopper" rings unless you break one or both during cleaning.
In another of your photos above I see O-rings mistakenly put on 2 of your brass main jets (#72 or #105)...
I strongly suggest that you spend significant time during the next week or two reading thru many of the "sticky" (permanent) threads in the SOHC sub-forum here titled Carburetion & Fuel where you'll learn a lot more of what you need to learn just like I and most others have...
the last 2 photos you shared I see are from 4into1 website which is a good source for your carbs needs
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Acrillx
Member
yeah im not too sure why that O-ring was like that, So far everything i have seen and you guys seen, is just how i got it honestly, i have a whole extra carb body that idek why its there, I plan on reusing everything i can i just couldnt find specific kits for the O-rings i did need, Thank you for that link it will help alot as im gonna order it this upcoming week, I will be reading up on those forms aswellThat 16010-417-305 kit you photo-linked from eeeBay is incomplete and missing several O-rings and the black plastic kidney-bean shaped part installed under the slide pistons which I see you already have and should not be bought
If the rubber of your 2 air cut off diaphragms is still flexible and neither has any holes or tears, re-use them. Also re-use your large white plastic "stopper" rings unless you break one or both during cleaning.
In another of your photos above I see O-rings mistakenly put on 2 of your brass main jets (#72 or#105)...
I strongly suggest that you spend significant time during the next week or two reading thru many of the "sticky" (permanent) threads in the SOHC sub-forum here titled Carburetion & Fuel where you'll learn a lot more of what you need to learn just like I and most others have...
the last 2 photos you shared I see are from 4into1 website which is a good source for your carbs needs
Here's an excellent source for your carbs O-rings:
VB Carburetor O-Ring Kit (For 2 Carbs) - Hondamatic Parts
This carburetor kit includes most o-rings needed to rebuild your VB carbs on your CB400/CM400/CM450/CB450SC. You can buy these individually but you'll pay minimum quantities. O-rings are not junk ones sourced from Harbor Freight kits. These are direct from McMaster-Carr and are NBR rated for...www.hondamaticparts.com
Boosted
Veteran Member
Here's a pic I discovered today of one of the consequences of not being careful enough when attempting to extract (unscrew, remove) the main nozzle (#16166-417-670) in each of your carb bodies:
Boosted
Veteran Member
OOPS, the O-rings kit from HondaMatic's website is for carbs that have accelerator pumps which yours doesn't.
As punishment, I share :
Studying the parts illustration for your 1978 CB400A VB24A carburetor, here's the O-rings I see:
Fuel Joint Pipe, 1 at each end (2 total)
Pilot Mixture Screws, 1 ea. carb (2 total) *
Air Cutoff diaphragm cover-to-body, 1 ea. carb (2 total) **
Float Bowl drain screws, 1 ea. carb (2 total)
O-ring for slide piston center hole plug (plug is white plastic/nylon), 1 ea. piston (2 total)
Large O-ring to seal junction between each carb body's "insulator" and engine's cylinder heads (2 total)
Other carb rubbers:
A.) 2 "passage plugs" - they're the 2 stepped/tiered hole plugs showing in that eeeBay kit photo you linked in post #50 above.
If you have 2 that fit snugly into your carb bodies already, re-use them... ..The solid post on inside of each float bowl keeps them pushed in
B.) rubber-tipped float needle valves, 1 each carb, (2 total)
C.) rubber diaphragmed Air Cutoff valves, 1 ea carb, (2 total)
D.) float bowl gaskets, 1 ea carb (2 total)
* these are the smallest O-rings your carbs use
** these O-rings are unique in that they have 1 flat or square-cut side which goes against carb body
As punishment, I share :
Studying the parts illustration for your 1978 CB400A VB24A carburetor, here's the O-rings I see:
Fuel Joint Pipe, 1 at each end (2 total)
Pilot Mixture Screws, 1 ea. carb (2 total) *
Air Cutoff diaphragm cover-to-body, 1 ea. carb (2 total) **
Float Bowl drain screws, 1 ea. carb (2 total)
O-ring for slide piston center hole plug (plug is white plastic/nylon), 1 ea. piston (2 total)
Large O-ring to seal junction between each carb body's "insulator" and engine's cylinder heads (2 total)
Other carb rubbers:
A.) 2 "passage plugs" - they're the 2 stepped/tiered hole plugs showing in that eeeBay kit photo you linked in post #50 above.
If you have 2 that fit snugly into your carb bodies already, re-use them... ..The solid post on inside of each float bowl keeps them pushed in
B.) rubber-tipped float needle valves, 1 each carb, (2 total)
C.) rubber diaphragmed Air Cutoff valves, 1 ea carb, (2 total)
D.) float bowl gaskets, 1 ea carb (2 total)
* these are the smallest O-rings your carbs use
** these O-rings are unique in that they have 1 flat or square-cut side which goes against carb body
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Acrillx
Member
Shoot me a pm of the carb body number that broke and ill check out the extra one i have in the morning, if mine matches up to yours, you can just have it free of charge tbh, also is there a certain way to remove the float bowls? the one thats on one of my carb bodies seem to have a stuck pin
Acrillx
Member
Hmmm would i be better off ordering a different kit then? also i havent even seen any passage plugs on my carb set, ill take a closer look for them, the float needle valves i am getting 2 new ones sometime soon, the air cutoff valves seem okay for the most part, ill take a very close look soon, float bowl gasket i mean they look okay, but i was wondering if i should just replace them instead of reusing them
Boosted
Veteran Member
That broken carb body is not mine - It was on eeeBay. I didn't break mine, but I paid a machine shop $50 to remove one of the main nozzles after I sheared off its "ears" for a screwdriver trying to unscrew it because I did not heed the numerous warnings here nor pay enough attention to the tips shared by the successful.
Float bowls are metal and removable after removing their 3 attachment screws. If stuck on, gently tap bowl to unstick it from gummy old gas adhesion to rubber gasket.
Floats are plastic (black or white) and install with a pin. If pin is stuck, drip or spray a penetrant (Liquid Wrench, PB Blaster, WD40, etc..) on each end of pin, let sit, then gently tap pin loose or out with a small punch that's narrower than pin and lightweight hammer (or else pin holding towers could break off from carb body and you'll be buying replacement carb(s)
That incomplete gasket kit you shared photo of in post #50 above shows the 2 passage plugs
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Acrillx
Member
I was pretty tired I probably missed a few words haha, also ohhh okay, For some reason I thought it was haha, Also thank for the floats tip as that's what I meant, What do you recommend out of those options? I used pb blaster before, Not sure what's the " best " one though, Also okay, I'm guessing ill be buying a few different gasket sets to get all of them altogether from what I've been seeing/looking up
Maraakate
Veteran Member
it includes the o ring for the pumps too. probably forgot add that in the listing.
Maraakate
Veteran Member
theres Steve's 79 where i show you.how.i remove them with heat. works well, but requires many precautions.
Acrillx
Member
Hey so lil update as I've been taking a break, how should i get this out? looks like someone screwed it lol, I'm guessing pb blaster or something but as for what tool, what would be best at this point in time?
On a good note I will be having enough money soon to order carb gaskets and etc, id say another week then i can continue with this beauty.
As for that other carb body i mentioned its a 24c carb body, If anyone would like it PM me, I'm currently putting it through a cleaning, IF no one would like it, How much could i list it for on ebay or somewhere? it is one side only, has no pieces to it either, really just 1 side of the carb already stripped to the body only
On a good note I will be having enough money soon to order carb gaskets and etc, id say another week then i can continue with this beauty.
As for that other carb body i mentioned its a 24c carb body, If anyone would like it PM me, I'm currently putting it through a cleaning, IF no one would like it, How much could i list it for on ebay or somewhere? it is one side only, has no pieces to it either, really just 1 side of the carb already stripped to the body only
Boosted
Veteran Member
What specifically?
I see 6 (maybe 7) parts still to be removed:
1) float pin, float , float valve
2) needle jet holder (use a 7 mm wrench or socket)
3) EDIT: #42 ? secondary jets (review the special procedure in the sub-forum requiring a drill bit for a pilot hole and a specific-sized bolt with a nut on it and washers for extraction)
4) main nozzle (most difficult and challenging part of all carb parts to remove - REVIEW SPECIAL PROCEDURE in carb&fuel sub-forum, ASK FOR TIPS during our phone call, USE HEAT from both sonic cleaner and butane pin torch or lighter, 4mm X 1mm flathead screwdriver, toothpick to plug hole of nozzle while soaking in penetrant, or else PREPARE FOR FAILURE and possible machine shop expense or carb replacment expense ! ! ! ! !
5) mixture (pilot) screw ( use snug fitting flathead screwdriver after penetrant soak, time, gentle tapping of screwdriver while inserted in slot, heat )
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Post #2 of this thread https://www.vintagehondatwins.com/forums/threads/rebuilding-cb900f-vb43c-carbs.6189/
Maraakate
Veteran Member
Interested in the carb body if youre just mostly giving it away. I save these for customer bikes that have really bad carbs.
Acrillx
Member
I didnt see that specific part of the thread but i take the blame for that as I tend to read a little too fast, question tho, before i buy a left handed drill bit, could i possibly cut a deeper slot into it with a dremel? I know its a bit risky considering where it is, but would save me a few dollars, If its not a workable idea then ill pick up the drill bits
Acrillx
Member
im still cleaning them up a bit but all youd have to pay is shipping, I dont mind giving it away if its going to good use to someone here specifically, you know?
Maraakate
Veteran Member
OK, ill send u a PM