No, I don't. The carb is together and setting on the bench. Are you interested in the lower "tip" end diameter. I suppose it would have to be disassembled to get this measurement. We'll see if I can muster the ambition to tear it apart again.

 

LOL, its 4 screws...

 

Sometimes I'm not very ambitious!

My carb's diaphragm is a pain to get back in. I always need to soak it in HOT water to stiffen/shrink it up enough to get it back in.

 

Man, you're going to have to have a very high quality micrometer to get a really good reading on a carb needle diameter. Obviously it's doable, but the ol' Harbor Freight digital $15 vernier caliper won't get it done.

 

That's what I would be using. If that's not accurate enough, not worth the effort!

 

I put mine in the freezer to help get it back into the carb.

 

I never understood that, doesn't that goes against the laws of physics? I thought when something was heated it expanded and when it's cooled it contracted. I would think putting the rubber diaphram in HOT water would make it harder to install, but I have read that several times on various forums.

I didn't do it, just fiddle with it for awhile and you will get it back where it goes.

 

Hot soak was a recommendation from the HMF forum, and it works. Perhaps the diaphragm as a different than typical quality to keep it from getting too soft and floppy when the engine gets hot?
Kawasaki KLX 250 slip on - Page 2 - HMF Engineering Forums

 

Yeah. I saw where they recommended that, I just don't get it is all. Makey no sense to me.

 

The one and only time I've had this carb apart, the diaphragm had expanded, as typical. I tried a quick hot bath for it...but that didn't work for me.

What did work was this: I got the diaphragm positioned as close as I could, then put the cap over the top, and finally used a very small flat blade screwdriver to work around the carb, pushing the diaphragm into its groove as I went. As I was working the rubber into the groove, I used downward pressure on the cover to keep it from popping back out. It worked very well, and I don't think I'll even try any sort of soak again. Just need to be gentle, and best not to use a pick or particularly sharp tool: don't want to risk puncturing the diaphragm.