Can't seal the Carb up!

C

Cr9ck

New Member
Ive tried siliconing the carb up twice and putting on a oring once (at the intake and carb connection). Should I get an o-ring from sick bick parts or could it be leaking at the float? The gas inlet on the carb seems to leak too. I cant figure out how to seal up the darn thing! Should I go get a flat o-ring from ACE. How do I know if its gas proof?
 
You mean it's leaking fuel? Sealing or o-ringing isn't gonna help. Just dry it really well and inspect at the fuel line incoming.....
 
No its an air leak. I dont think its leaking fuel much if at all. I did notice some leaking but could be from priming pin.
 
Unless there is a crack or something (it happens) sealing well with silicone should work fine. It's just messy, ugly, nasty, and a pain in the ass.

How is the gasket on the engine side?
 
Just an idea here:

Mine was leakin' like a sieve so I tightened the screws good and the inlet as well and it stopped for a little while. When it started again, it was spittin' out the air intake. Take it apart and look at the float. If your float looks like mine then you may have the same problem I have. My float had somehow sucked fuel into it, thereby making it not float and caused it to leak. Don't ask my how it filled up with fuel-it's still a mystery to me, but it did and it doesn't want to leak out either!
 
A float with fuel in it should be replaced or repaired.
Use a soldering iron to repair after the gas has been removed.
 
Bikeguy Joe said:
A float with fuel in it should be replaced or repaired.
Use a soldering iron to repair after the gas has been removed.
Click to expand...

That's a good idea! I've been wondering about the best way to seal it back up after the gas has been removed. What gets me is how it got in there to begin with and why if won't leak out.....very bizare if you ask me!

I'll have to fix it because I wouldn't know where to find another float for it.

Hey, what about filling it up with Great Stuff when I'm done?
 
If you contact any of the sellers of these bicycle motor kits, some one will have one for sale.
 
thanks for your help so far. Silicon didn't work. I want to do a o-ring. Dax suggested a flat one from ace. Will the one from sick bike parts work? Does it need to be fuel resistant?

I tightened my inlet too but I dont think it leaks air from there but I did notice slow down after spraying carb cleaner. I dont think the top where the throttle cable screws on is loose anymore.

Dang this thing is a pain. I wish it would seal up.

thanks
 
If it's leaking where the four "slots" are, try grinding it down on a belt sander or bench grinder. I had to do that with one so it would seal. If it won't slide on far enough, it will suck air at the ends of those slots.
 
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