Oil substance out of carb drains

I am new to this forum.
I just bought a 77 KZ650B. I paid $150.oo for it. It isn't running, at this time. The previous owner said he rebuilt the carbs, and was able to get it running. It has set in his shed since. It has set for 5 years. So, I unscrewed the drains on the carbs, and it looks like oil is draining out. Now, I am familiar with fuel injected bikes. This carb stuff is new to me. Is this old gummed up fuel? What should I do? Rebuild them, or clean them up?

Thanks

If it sat as long as you say your best bet is to pull the carbs and give them a good cleaning then see what you have to work with. That is probably gunk and funk coming from the drain screws

I 'cleaned' my '78 kz1000 carbs. Lemmetellya the gas turns into all kinds of rotten oily hell in there.

Although I have not touched reefer (well, that's what we called it back in the mid-70s when, as a teenager I gave it up for good) since the mid-70s, but the junk reminds me of the oily resin you'd find in a reefer pipe.

Good luck, do it thoroughly, I have to do mine all over again (see my new post about this...)

jeeplover wrote:

I am new to this forum.
I just bought a 77 KZ650B. I paid $150.oo for it. It isn't running, at this time. The previous owner said he rebuilt the carbs, and was able to get it running. It has set in his shed since. It has set for 5 years. So, I unscrewed the drains on the carbs, and it looks like oil is draining out. Now, I am familiar with fuel injected bikes. This carb stuff is new to me. Is this old gummed up fuel? What should I do? Rebuild them, or clean them up?

Thanks

Gas does oxidize into a thick reddish brown slime over time.

If it is oil, some people used to store carbs filled with oily fluid to keep the seals from drying out. You have to flush them well to get then stuff out.

More important, you have to flush the gas tank and get the rust out or it will never run right for long.

Kawickrice wrote:

If it sat as long as you say your best bet is to pull the carbs and give them a good cleaning then see what you have to work with. That is probably gunk and funk coming from the drain screws

Yes sir I agree make sure the tank and fuel lines are clear and a new gas filter is on ..Clear gas lines let you know what you may have in the fuel system...

And remember to install a new inline fuel filer, or two of them where dual fuel lines are used, otherwise the carbs will likely be instantly re-contaminated.

The oem filter screens are woefully inadequate.

Good Luck!

Thanks for all the info guys.