Wrong size carb from the factory?

[Anonymous]

Well,folks. I was cleaning up the carbs on my low budget 750 drag project when I noticed one carb was significantly smaller than the others.
My bike has rack mounted 26mm Mikunis. However, carb #1 was a 24mm.
Doesn't really matter to me since I have bored them to 29mm. I wonder if other guys have had mismatched carbs.
Craig

[terry]

Hey Craig, how did you bore them, did you set them up in a lathe? Lemme know mate, I want to bore my GS750E carbs, but I'm too chicken? Cheers, Terry. :twisted:

[robinjo]

Weird man! But I suspect a previous owner for making the mismatch.
Are there any GS bikes with 24 mm carbs? 550's have 22's right? Just trying to learn something today

[Anonymous]

Carb mods

Terry, the Mikunis are a soft aluminum. They can be easily enlarged in the throat with sandpaper. Of course, the trick is to make the enlargements consistent between all four.
I made some attachments for my Dremel and worked very carefully. I made about 1,000 measurements. Remember, I didn't have to make them exactly 29mm. I had to just make them all the same. I went 28.75mm. I didn't want to get greedy. Then, I used a carbon steel brush to polish the throats. Do you want a picture?

Robin, I found VM24 part numbers listed on the Sudco.com website. That is about all I can say on that.

Craig

[terry]

G'Day Craig, thanks for that mate, yeah I'd love to see a picture? Cheers, Terry.