Carb is *@%^$*@%^$*@%^$*@%^$ing gas like a cow

[Brendan W]

If the needle is the problem I would expect to see some sign of wear on the tip significantly different to the others.
Back to basics, mechanical float level, fluid float level, float sticking.
In the days of hollow floats there was even float sinking to check out.
With a bit of luck opening cleaning and rebuilding cures mystery faults.
Keep your wallet in your pocket until you find a smoking gun.
Even then I'd take my chances with a used carb for oem parts rather than anything cheap on the internet.

[maisf]

Of course, I wasn't talking about some third party replacements, I'm looking for OEM...
A used carb seems like a far fetch, pre 1980 bikes seems sparce around here.

Anyway, I don't mind spending some cash, as long as it's not too much, and as long as it fix the /%$/%/ problem...


So they have them (float needels and seat) at Z1 for 20 US$ but then it's the shipping to Canada that's killing me.

I think you're right, I'll have to unmount this again first and have a through look at all this. I don't remember the float needles being that bad... But then, maybe the previous owner changed them without changing the seats!

The float height specs measurement method is still unclear to me. It's measured with the carb upside down, from the very top of the float to the gasket surface, with needle depressed or not?

And for measuring fluid level, I need a clear tube with some sort of an adapter in place instead of the bowl drain plug, right? I've seen this setup for sale at Z1, with same shipping issue as for the needles... gosh...

Hehehe no easy way out!

[Noreg]

I had the same problem (never run on reserve if your gas tank is full of rust). I just took the carb out, bounced the bouncy bit and the float a bit and put it back on. Worked like new afterwards.

[Big T]

The float height specs measurement method is still unclear to me. It's measured with the carb upside down, from the very top of the float to the gasket surface, with needle depressed or not?

And for measuring fluid level, I need a clear tube with some sort of an adapter in place instead of the bowl drain plug, right? I've seen this setup for sale at Z1, with same shipping issue as for the needles... gosh...

Hehehe no easy way out!

You've never read Nessism's carb build tutorial?
Where are you getting your information?

[chris]

Or you can kick the 40 year old carbs to the curb, and get a set of Mikuni rs34. More midrange power and no PIA airbox required. Lots of pluses except cost.

[Noreg]

Or you can kick the 40 year old carbs to the curb, and get a set of Mikuni rs34. More midrange power and no PIA airbox required. Lots of pluses except cost.

I found one on ebay. My wife said: NO!

Do those carbs not need to be synched or adjusted?

[chris]

I have never put rs34's on a 850, but my 36s were pretty much perfect for my 1100 out of the box. I wish I bought them sooner. They are easy to work on and if I need to it only takes 15 minutes to put them from bike to bench, not possible with a airbox setup.

[maisf]

You've never read Nessism's carb build tutorial?
Where are you getting your information?

Hi Big-T,

Well, I guess I'm just trying to figure this out...

Aren't these technical forums?

I'm not allowed to ask technical advice?

[maisf]

Well, I did wrench on the carbs yesterday...

Clean up the bowl, the float and float needle, of the offending carb. I spotted the floats of this carb was "lower" than the other, so I jiggle it a bit.
I got them all line up pretty good. Height measurement were out of specs, but then, The 3 others weren't leaking... right?

By the time I got to get the bowls back in, I saw a felt pen mark I did before dismantling the carbs, oh oh... That wasn't the leaking carb... I was working on the second one and my problem was with the third one...

Hahaha...

Re-cleaned the right one, needle wasn't bad looking, as far as I know.

Put everything back in, carbs, gas cables, choke cable, airbox, gas tank, I'm getting good at this!

All good, Let's put this petcock to the prime position to get these bowl full of gas...

gulp, gulp, gulp... gas is leaking from carb no 1....
Ok what now. Then I remmbered 80GS1000 advice about knocking on the bowl.

As I was knocking down on it, my daughter asked me "Dad, are you really trying to fix this by knocking on it?"

But.... It worked!

And carb number 3, isn't leaking any more...

I finally rode over 50 km and got back home without a new problem!!!

Gosh this feels good...

Thanks you guys for your help!

[chuck hahn]

Got to SIRIUSCONSOLIDATED for seat and needle kits. OEM quality but way cheaper. Fill in the search boxes info and your in