Last night I went ahead and tore apart the carb.  I've been having some performance issues (stalling, running rich) and wanted to clean out the carb and figure out what jets are in there.  I read the numbers/letters on the pieces and have no idea what they mean.  If someone could tell me I would appreciate it.

Small jet that came out from the bottom (float bowl area): 47.5

Top jet (under the diaphragm): 67.5 or 87.5 (part is missing)

Big tube that the needle sits in: 534 X-6

Needle: 5C17

Those were the only marking on the parts I could find.  I have no idea what they mean and how they work together.

Thanks.

I was just looking over the carb diagram and noticed that there is a diaphragm assembly that is still on the carb as it's soaking in carb cleaner.  I am assuming it's toast.  

What exactly does that part do?  That was on the last time I dunked the carb.  

toddlamp8 wrote on 12/31/69 at 16:00:10:

You didn't remove the transient enrichment valve cover first?
So you dunked the diaphragm that's in it? OY!
Hmmmm... Maybe no carburetor cleanup got in there! (I'm probably wishful thinking for you).
I found this info for you:

TRANSIENT ENRICHMENT SYSTEM
This transient enrichment system is a device which keeps fuel/air mixture ratio constant in order not to generate unstable combustion when the throttle grip is returned suddenly during high speed driving. For normal operation, joining of the air from upper part of carburetor inlet side to pilot air passage obtains proper fuel/air mixture ratio. But if the throttle valve is suddenly closed, a large negative pressure generated on cylinder side is applied to a diaphragm. The valve @ which interlocks with the diaphragm closes an
air passage, thus, the pressure flows out to the pilot air passage.
This is system to keep the combustion condition constant by varying the fuel/air mixture ratio by controlling air flow in the pilot circuit.

url:
http://www.vx800.net/man_eng/06_Fuel%20and%20lubrication%20system.pdf

Reelthing wrote on 12/31/69 at 16:00:10:


Perfect thank you.

Reelthing wrote on 12/31/69 at 16:00:10:

Oops!!!!  

Helps to keep it from going BANG when you snap the throttle shut - but these later model engines do it anyway as they are already too lean from the factory

yours is an '86 so your main jet should already be a 155

by the way do you have one grove on the needle or 3 ?

but you only have one where the c-clip goes and not 3? - some of the older carbs had an adjustable height on the needle so you didn't need to mess with the thinkness of the white spacer if you wanted it richer