From an excellent 5twins thread here; https://www.xs650.com/threads/suzuki-carb-parts-for-our-650-carbs.61197
A couple of these have been mentioned before, the butterfly shaft seals and the brass floats for the 1980 BS34s .....
..... but I've discovered some others and would like to share. Here's a Suzuki parts diagram from Part Shark showing most of them .....
Part #16 is, of course, the butterfly shaft seal. At around $1.50, it's quite the bargain especially since Yamaha's price recently spiked big time, more than tripling from a retail of $5.99 to $18.50. Even discounted from Partzilla or Part Shark, you'd still have to give $12 to $14 for one. The next two parts on the list, #17 and #18, are pure "unobtainium" from Yamaha, they don't even show or list them. #17, what Suzuki calls a "Gasket", is actually the plastic washer you'll find on the BS34 butterfly shafts. I was delighted to find this part as they are often pretty beat up and in need of replacement .....
Part #18 is the e-clip fitted on the outside end of the right BS34's butterfly shaft, another part I was delighted to find. They are often pretty crusty and rusty. Here's one compared to an original and it is, indeed, an exact match .....
Part #26, the float bowl gasket, may seem expensive at a bit over $6, but it's not compared to Yamaha's $38 retail price. Part #28, the rubber plug for the pilot jet, is also a few dollars cheaper from Suzuki. But both of these parts can be found cheaper from the aftermarket on eBay.
Part #34, the retaining plate for the BS34 float needle seat, I sort of struck out on. Usually, when you look a part up on Partzilla, they have a picture of it. For this one they didn't, so I just went by the drawing, and it let me down, lol. Here's what the part really looks like .....
But even though there was no way it would fit with the extra tab on the side, at least the cutout and mounting hole matched .....
So, I was able to cut it down and make it fit pretty easily .....
But, I wasn't giving up on finding this part yet, lol. There were several others offered that did show pictures in their listing, and this one looked to be a match compared to an original I measured, just under 5/8" long .....
..... and it is, matching up and fitting perfectly .....
Next up on the list, replacement plastic floats for the BS34s. From researching, I figured these had to be the ones, but the only way to know for sure was to buy some. On a recent 1980 BS34 refurb, the original brass floats were shot from sitting coated in gas varnish for 20+ years. It had eaten holes in them and they failed the hot water dip test. I recommended the guy switch to the plastic floats as they can't do that since they're a solid plastic foam. Basically, they should never go bad. Plus, they're a couple dollars cheaper than the brass replacements. And we have a winner. These are the same float, an exact match in every respect. Here's one compared to an original .....
One of the things you look for in a replacement plastic float is whether or not the pivot pin hole has a tube sleeve insert .....
Many aftermarket ones do not and that makes for a sloppy, loose fit on the pivot pin. The float can hang up and stick in operation, and often does. The Suzuki float has the tube insert so it's good .....
And last on the list, #37, is the float hinge pin, and I quite like this one. Much cheaper than the Yamaha one and , in my opinion, it's better .....
The Yamaha pin is stepped up under the head and won't insert fully. You need to tap it in with a small hammer to get it fully installed. This can make it difficult to remove, running the risk of breaking a pivot post off .....
The Suzuki pin isn't like that, not stepped out under the head much, if at all. It easily inserts nearly all the way, then a couple gentle taps with a small hammer seats it fully and "sticks" it in place .....
But even if it didn't "stick" in there, there's no worries about it backing out. When you install the float bowl, the pin and posts fit into this area .....
..... and that effectively blocks the pin in so it can't back out.
A couple of these have been mentioned before, the butterfly shaft seals and the brass floats for the 1980 BS34s .....
..... but I've discovered some others and would like to share. Here's a Suzuki parts diagram from Part Shark showing most of them .....
Part #16 is, of course, the butterfly shaft seal. At around $1.50, it's quite the bargain especially since Yamaha's price recently spiked big time, more than tripling from a retail of $5.99 to $18.50. Even discounted from Partzilla or Part Shark, you'd still have to give $12 to $14 for one. The next two parts on the list, #17 and #18, are pure "unobtainium" from Yamaha, they don't even show or list them. #17, what Suzuki calls a "Gasket", is actually the plastic washer you'll find on the BS34 butterfly shafts. I was delighted to find this part as they are often pretty beat up and in need of replacement .....
Part #18 is the e-clip fitted on the outside end of the right BS34's butterfly shaft, another part I was delighted to find. They are often pretty crusty and rusty. Here's one compared to an original and it is, indeed, an exact match .....
Part #26, the float bowl gasket, may seem expensive at a bit over $6, but it's not compared to Yamaha's $38 retail price. Part #28, the rubber plug for the pilot jet, is also a few dollars cheaper from Suzuki. But both of these parts can be found cheaper from the aftermarket on eBay.
Part #34, the retaining plate for the BS34 float needle seat, I sort of struck out on. Usually, when you look a part up on Partzilla, they have a picture of it. For this one they didn't, so I just went by the drawing, and it let me down, lol. Here's what the part really looks like .....
But even though there was no way it would fit with the extra tab on the side, at least the cutout and mounting hole matched .....
So, I was able to cut it down and make it fit pretty easily .....
But, I wasn't giving up on finding this part yet, lol. There were several others offered that did show pictures in their listing, and this one looked to be a match compared to an original I measured, just under 5/8" long .....
..... and it is, matching up and fitting perfectly .....
Next up on the list, replacement plastic floats for the BS34s. From researching, I figured these had to be the ones, but the only way to know for sure was to buy some. On a recent 1980 BS34 refurb, the original brass floats were shot from sitting coated in gas varnish for 20+ years. It had eaten holes in them and they failed the hot water dip test. I recommended the guy switch to the plastic floats as they can't do that since they're a solid plastic foam. Basically, they should never go bad. Plus, they're a couple dollars cheaper than the brass replacements. And we have a winner. These are the same float, an exact match in every respect. Here's one compared to an original .....
One of the things you look for in a replacement plastic float is whether or not the pivot pin hole has a tube sleeve insert .....
Many aftermarket ones do not and that makes for a sloppy, loose fit on the pivot pin. The float can hang up and stick in operation, and often does. The Suzuki float has the tube insert so it's good .....
And last on the list, #37, is the float hinge pin, and I quite like this one. Much cheaper than the Yamaha one and , in my opinion, it's better .....
The Yamaha pin is stepped up under the head and won't insert fully. You need to tap it in with a small hammer to get it fully installed. This can make it difficult to remove, running the risk of breaking a pivot post off .....
The Suzuki pin isn't like that, not stepped out under the head much, if at all. It easily inserts nearly all the way, then a couple gentle taps with a small hammer seats it fully and "sticks" it in place .....
But even if it didn't "stick" in there, there's no worries about it backing out. When you install the float bowl, the pin and posts fit into this area .....
..... and that effectively blocks the pin in so it can't back out.
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