Tried to take the bike to class last night, and had trouble starting it. Got about 1/2 mile down the road when it died.
Took me a while and get her started up again, and as long as I revved her hard she kept going (died when easing throttle).
So this morning I tried to figure out what was going on. Finally got her started same thing, let go of throttle she died. Then I noticed a big puddle on ground. GAS! Dripping from the bottom of bike. Started her back up again to see where it was coming from, this time is was pouring out from underneath, couldn't see where it was coming from. Let go of throttle and she died. Removed seat to see if I could find it, and noticed the end of the tube that is never connected to anything, except the top right of the carb, was wet. I always have it tucked under the seat.
Started her up again to see if gas would come pouring out, nothing, no leak, no dripping, not from anywhere. Let go of throttle, she died. So I decided to put her on PRI. Started her up, she ran let go of throttle she ran..... turned petcork on "ON" she died. Guess my petcork is broken.
Now how is it possible for gas to come out of that little hose? How come she rode fine for a while and then this? AAAHHHHHHHH!!

Thanks, I'll look for that post in the tech forum, sounds interesting!

IW.  Check the vacuum line going to the petcork.
If it's leaking, the petcork can't feed gas to the carb.

How it works:
In NORM.  Petcork is closed by diaphram inside, no gas flows.  Engine starts, the vacuum line to the petcork pulls on the diaphram and opens path from tank to carb, gas flows.

In PRI. diaphram is bypassed and gas flows all the time, and is only stopped by the float valve in the carb.

So, I would check that vacuum line first.

Well!!..........
Did not see fuel in vacuum line. Have petcork taken all.... the way apart. Looks like diaphragm is intact. Now what I did find
was an utterly yucky!!

I kinda wonder if it was able to have any suction at all!
I think I might attempt the petcork conversion. The only thing I'm worried about with doing that is....what happens if i forget to turn the petcork OFF after I'm done riding?

your ok as long as the carb float does not stick

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


And there is the voice of the someone who knows better than I.
You just cleaned the carb.  I wonder if the float didn't go in quite as it should maybe?

doesn't take much of a wear ring on the float needle rubber to make a less than proper seal - might eyeball it real good - normal when the petc0ck fails the bike starts sucking gas in through the vac line and running rough - then when you turn it off it contiues to run down the vac line filling the air box and cylinder with fuel - this fuel slowly seeps past the rings and fills the crankcase - then you can have some real issues as the new mixture of oil and gas doen't lube quite as well and stuff that moves starts to score pretty fast

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

That's a hard one! it looks absolutely perfect!