Ball bearings in a carb?

[frank]

I have a 79 xs bobber andas I was tearing down the carbs I found two ball bearings beebee's if you will sitting right on top of the carb pistons? Are they supposed to be there and if so what purpose do they serve. Help please.

 

[gggGary]

The only balls I know of on BS34s are the spring and ball choke rod detents

 

[frank]

Well these bearings I found are right on top of the ventury slides? Should they be there?

 

[remmy1101]

you mean there in the center of the diaphragm? on top of the slide? thats odd and no they should not be there.
exploded view of the carbs
http://www.bikebandit.com/houseofmotorcycles/1982-yamaha-motorcycle-xs650sj/o/m8274

you can get a good reference from that of what should and should not be there

 

[frank]

Thanks alot! yeah i don't know how they got there but they are out now. tomorrow i satrt reassembly of the carbs and manifolds!

 

[angus67]

maybe a previous owner thought he could richen up by making the slides a little heavier? voodoo?

 

[kent_in_kc]

Yeah, Voodoo balls! It had to happen.

 

[keninoc]

Interesting, I was searching this site for the same reason. I bought an 80 xs with the carbs in a box with the pistons pulled out. The 2 bearings were in the box with the pistons and I could not figure out where they came from. Garys answer gave me a clue that they must be for the choke rod. I am guessing that they fit on top of the spring against the rod? BikeBandit does not show these on their schematic.

 

[gggGary]

Yes and if you forget they are in there on disassembly they will give you some quality hands and knees time on the shop floor.

 

[keninoc]

yeah. I actually have a set of knee pads for that purpose. Thanks for your help Gary.