Diagnosing a carb problem

[gspd]

Sorry that I don’t have pics—I threw them out before I came back on the forum.

i hope you realize that you are probably the only airhead guy that doesn't hoard his old mostly useless parts
I've actually built sellable bikes out of old seemingly useless parts.

[pdx_r100s]

Ha! I couldn’t see any reason for keeping sunk floats, but I do have a bag with the old ignition and all the worn out brass from the carbs that I replaced.

[barryh]

I've also seen heavy saturated floats lighten up again after being left lying around for a while (many months?) .

I still have my old sinkers and after years on the shelf they did lighten but not back to the new weight of 12.5 grams. I no longer have access to accurate lab quality scales but I think they are 13 - 14 grams which is certainly usable in a pinch. They never were dark brown more like light tan - see pic below.

Oak always suggested putting the floats into a container of gas. If 1/3 of the float was above the gas line, the float was generally OK. I think Snowbum did some float-weight testing years ago...might have posted about it on his website.

Kurt in S.A.

Chucking them in a jar of fuel to see if they float doesn't replicate how they work. I reasoned that you need to support the pivot point in some way. The 1/3 above sounds correct because these floats were around 16 grams and close to sinkers. Without supporting the pivot point they sank like a stone.

Float test.jpg (63.79 KiB) Viewed 741 times

[Rob Frankham]

Sorry that I don’t have pics—I threw them out before I came back on the forum.

i hope you realize that you are probably the only airhead guy that doesn't hoard his old mostly useless parts
I've actually built sellable bikes out of old seemingly useless parts.

Errr, no. I think it's the other way round. The minority is the group who throw everything away...

Rob

[gspd]

The minority is the group who throw everything away...

Would that not that imply that the majority (of airhead owners) hoard (amass, collect, stockpile, accumulate) their useless parts?

[Rob Frankham]

The minority is the group who throw everything away...

Would that not that imply that the majority (of airhead owners) hoard (amass, collect, stockpile, accumulate) their useless parts?

In my limited experience, that pretty close to accurate... you should see what's in my store

Rob