Topic: Where Can I Find Choke Valve Screws?

[AintNoEasyWay]

Was hoping I wouldn't have to replace the old choke valve screws in my carbs, but it looks like some of them aren't going to screw back in due to being peened. Looking to find replacements for my PD41A carbs. If any of you have extras that you're willing to sell or if you have an idea of what size I'd need to order, I'd appreciate your response.

Thanks!

[flybox1]

 
got a picture of the part?
(i have a set of 41a's that im parting out)

[martin99]

Got a feeling he might be talking about the accelerator pump...

[AintNoEasyWay]

Hey guys, I'm referring to these 8 screws, four of which are in the picture below.

[flybox1]

thats part of the throttle link set.
probably cheaper to take the screws and rod to a local store and get a few.

[AintNoEasyWay]

I bought the "correct" size metric screw, but they aren't stainless & I'm worried about them getting in contact with fuel. Could this become a problem at all? If not, I'll just keep the screws I've gotten. I'm also a little concerned about these screws coming loose; I assume the manufacturer peens them for a reason.

[flybox1]

red loctite and fogeddaboudit.

[martin99]

red loctite and fogeddaboudit.

+1


I don't recall mine being stainless or peened even. How would you peen them? I suspect the 'peen' is more likely where they've been chewed up during previous removal. I would just screw them in tight, but you could use some thread lock or spring washers if it gave you peace of mind.

[AintNoEasyWay]

red loctite and fogeddaboudit.

+1


I don't recall mine being stainless or peened even. How would you peen them? I suspect the 'peen' is more likely where they've been chewed up during previous removal. I would just screw them in tight, but you could use some thread lock or spring washers if it gave you peace of mind.

Haha. Great. Thanks, guys.

[Bodi]

KeiHin definitely peened them, there's a cross patterned die mark flattening out the thread extending through the rod. I file this bit off before removing the screws. I managed to unscrew one without filing, but it's quite tight and the Philips/JIS heads do like to strip. The only way this peening could have been done is with some sort of clamping tool ... which I don't have one of.
I found SS button head allen screws to replace the factory Philips ones. Sorry I don't know the thread size offhand. I screwed them in with loctite, hoping it isn't attacked by gasoline (the area behind the choke plate gets wet in full choke use). Probably I'm insane but I thought the tiny button heads would offer less airflow resistance than the Philips ones I could find. The OEM screws are not a "service item" and are not available from Honda.

[martin99]

KeiHin definitely peened them, there's a cross patterned die mark flattening out the thread extending through the rod. I file this bit off before removing the screws. I managed to unscrew one without filing, but it's quite tight and the Philips/JIS heads do like to strip. The only way this peening could have been done is with some sort of clamping tool ... which I don't have one of.
I found SS button head allen screws to replace the factory Philips ones. Sorry I don't know the thread size offhand. I screwed them in with loctite, hoping it isn't attacked by gasoline (the area behind the choke plate gets wet in full choke use). Probably I'm insane but I thought the tiny button heads would offer less airflow resistance than the Philips ones I could find. The OEM screws are not a "service item" and are not available from Honda.

That's interesting. I was thinking of peening more in terms of centrepunching the screwheads. Even so, mine came out fairly easily - perhaps they had been removed earlier by a PO?

[AintNoEasyWay]

The OEM screws are not a "service item" and are not available from Honda.

I was curious about this. Wondered if anyone knew what size the JIS screws were & thought possibly I could just order them from any JIS supplier online.

[City Boy]

Hi gang.The last choke plates I needed to remove,I ground off the exposed ,peened threads with a dremel,then reused same screws fastened with loctite. A year later,no ingestion.  Rock On

[Black 750K8]

I had this same issue got screws that were a little longer put them in with red like others said then took my dremel and cut the extra off after it was good and tight then use a spring loaded center punch in the center where I cut it off. They have been there for a few years. I'm not 100% sure but I think I went with 4/40 They don't have to be JIS.

[lucky]

You will NOT find these screws.
HARRISLOVE might know the size.
Take the butterfly shaft to the hardware store and find the correct screw that goes in to the shaft.

You could buy a TAP also after you find out what threads they are.
Then you can run the tap through the messed up holes.

So when you put the new screws back in, make sure to put RED Loctite on them or peen them so they do not get sucked into the engine.
DO NOT put nuts on them

[lucky]

Hi gang.The last choke plates I needed to remove,I ground off the exposed ,peened threads with a dremel,then reused same screws fastened with loctite. A year later,no ingestion.  Rock On

Excellent choice sir!

[Maurice]

This is the size:

http://www.mcmaster.com/#92095A179

[Black 750K8]

This is the size:

http://www.mcmaster.com/#92095A179

That looks about right and is why I went with 4-40 next size larger but not metric it was just what I had in the shop at the time Damn I turning into a PO

[AintNoEasyWay]

This is the size:

http://www.mcmaster.com/#92095A179

Right on. Thanks for the great discussion, guys. It's always great hearing where everyone's coming from.