How do I tell wich carb I have

[CalsXS2]

I'm getting conflicting info on which carb I have on my 72 XS2. Where do I measure from to get the proper measurement. Thanks.

 

[littlebill31]

Well, if they are from a '72 they would be 38mm. If they are stock XS carbs.
You measure the diameter of the intake.

 

[azman857]

Cal, if you go to MikesXS.com you can clic on the "Model ID chart" tab and get a close idea of which BS 38 model you should have and look like.

 

[5twins]

Post some pics of your carbs and we can probably tell you what year they are. Take pics from all 4 sides plus top and bottom.

 

[CalsXS2]

Thanks all. I'm pretty sure they're 38's. But here's the pic's so you guy's can verify.

In the last pic, you can see the cross over barbs. They seem to have been glued in with something, and now they are loose after cleaning them for my rebuild. What could I use to tighten them back up, or glue them in so to speak. Red loc-tite maybe. Thanks.

 

[bluebikerblan]

All of the carb sets from the XS1 of 1970 thru the XS 650's of 79 the F, SF & 2F had BS 38's of one series or another. Your's appear to me to be of the 256 series of 70, 71 or 72
but I can't tell which specifically but; most likely the XS 2 of 72'.

Here's link that should help with some very definitive info. in both table and narrative forms from the Australian site:

http://www.xs650.org.au/XS-TX650 Carburetor Evolution.htm

and of course our stand by carb guide posted on this site and others by grizld1 & 5twins

http://www.amckayltd.com/carbguide.pdf

Looks like you're doing a beautiful job of cleaning and rebuilding....the numbers stamped on the butterflys 120 or 125 will narrow things down a bit. BOL...Blue