The International CBX Owners Association

Does anybody know, if Honda sells the tiny screws that hold the throttle and choke plates? I can not find a separate number/size on any parts diagram I have.

EMS wrote:Does anybody know, if Honda sells the tiny screws that hold the throttle and choke plates? I can not find a separate number/size on any parts diagram I have.

I can't help but I'd bet Mike Nixon has a bag of them if you strike out otherwise. Or Randakk.

N.

Mike:
You can replace them with button-head socket screws in stainless. I have lots if you need a few. Honda used to have replacements that were bolt-head and had a locking strap similar to rear sprocket locking straps of old. I don't think they are still available.

The '79 choke plate shafts rarely strip out, but the '80-'82 ones often do. I think they used a different staking method on the screws and they tear out the threads sometimes. If that happens, just tap out the hole to 6-32 and use that size screw. You should also drill out the corresponding hole in the choke plate to get the play back that you usually need to center the plates.


Dave

Excellent! Thanks Dave! I have two sets of 79 carbs in which, for some reason, some of the choke plate screws are missing.

Mike, I was able to find correct size replacement screws at my local Ace hardware store when I rebuild my 79 carbs. They were metric, but I can not remember the size. I use blue Locktite when I put everything back together.

Thanks, JT! My local ACE hardware store was going to be my destination also

NilsMenten wrote:

EMS wrote:Does anybody know, if Honda sells the tiny screws that hold the throttle and choke plates? I can not find a separate number/size on any parts diagram I have.

I can't help but I'd bet Mike Nixon has a bag of them if you strike out otherwise. Or Randakk.

N.

I have 8,000+ of those on hand today. How many do you need?

Randall:

I am going to your web-site and order 2 dozen of them. Where do I have to look?

EMS wrote:Randall:

I am going to your web-site and order 2 dozen of them. Where do I have to look?

I don't normally sell them separately. I also try to avoid conducting commerce on Forums.

I responded because I was mentioned above.

Contact me directly for assistance. Email is best....better than PMs. Thanks.

Randall is of course a great source for these, as for a lot of carburetor bits. I have them also, and have over the years got them from Honda and from Kawasaki, but McMaster-Carr is probably the cheapest, though of course you must buy 25 at a time. Honda P/N 93700-03006-OB, Kawasaki P/N 220AA0306, McMaster-Carr P/N 94387A206.

Edit: Sorry, I missed the throttle plate screw part of the question. I rarely remove throttle plates, it is not usually a good idea, for some pretty good reasons. Occasionally I do though, and I use McMaster-Carr P/N 94387A240.

Mike S.
After reading Mike N's. response, I reread your question. You did say choke AND throttle plate screws. I was referring just to the choke plate screws. As Mike said, you rarely remove the throttle plate screws unless something in that linkage needs repaired/replaced. The screws are different sizes. I've been able to reuse all of the few screws I've ever removed for the throttle plates. Sorry for my confusion on your question.

Something I've observed when reinstalling the choke plates - if the screws aren't messed-up too badly, I have had good success in re-using them. If they thread in and run to bottom fairly smoothly, they will be fine. They are a slight 'interference' fit since the ends were staked and the threads in both the shaft and the screw are a bit altered. If they run in smoothly, but with a bit of resistance, I don't use Locktite. If I use new screws, I do use it. A word of caution with Locktite - use it very sparingly on the screws as it will 'creep' out the shaft and into the bore where the shaft goes through the carb body. If it gets in there, you will be taking them apart again to clean the shaft/bore. The shaft will freeze tight with just a bit of Locktite on it. If you do use it, let the carbs sit overnight to make sure the choke shafts are free before installing the carbs.


Dave

Thanks, Mike and Dave!
I didn't look too close and thought the screws were the same. I do not plan to remove the throttle butterflies. Just some of the choke plates on two sets of carbs have the screws missing. Wonder what happened
When installing new screws on the Bing carbs on BMWs, I have been sucessful in slotting the bottom end with a fine blade on a Dremel tool and then spreading the ends slightly after running the screws in.
If I order 25 screws from McMaster-Carr, I can do the two sets of carbs and have one screw left over

EMS wrote:If I order 25 screws from McMaster-Carr, I can do the two sets of carbs and have one screw left over

Cool! I always use the adjustable grade thread locker. Any other grade is too strong and the screw will sometimes break before it will come back out again. Of course, heat applied will break down the thread locker, but this is not a good area to put an open flame. I discourage the use of stainless steel screws. If you ever have to drill and extract one, they are a lot harder to get out than a regualr 1020 steel screw.