Yamaha XS650 Carb Questions?

Question

Ok so I am able to start the engine but it doesn't seem to want to run that long and I can't revv the throttle or put the choke back in, so I figured it was the carbs. I removed the carbs to find that they were full of gas and oil, but the thing is, that the oil that came out looked like it was rusty oil, like very rusty oil. Now could this be rust inside the gas tank? Could it be old oil which has been sitting in there for along period of time? Or is this normal and I just need to unclog the jets and clean out the carbs? Or could it be something entirely different?

Answer 1

Bike has been sitting for awhile & you didnt check the gas tank first??

CLEAN out the tank,,  flush the lines...   then look at the carbies..

If you do things in the right order its so much easier,,,  & you dont have to do it twice,,,

I just read what I wrote...  sounds a bit condecending...  but if your a young bloke/girl.  then you need to learn early, that when you have a problem , you should start at the begining & eliminate the possibilities one at a time..   makes life easy..

Answer 2

I would remove the tank and fuel lines and clean them out. Next, take the carburettors off, strip them down and clean them along with the jets. A substance that looks like oil should not be in the carburettors, it is not normal. I'd also clean the air filters or fit new one's.

Answer 3

IT depends on how long your XS650 has been sitting.it could mean that the old petrol  is contamanated and  the tank has rusted in side .which means that you will have drain it.And the carbes allso

Answer 4

I like motorcyles

Answer 5

It sounds like your carbs may be full of shellac and evaporated gasoline.  Some rust from the inside of the tank is normal on an older bike.  Soak the carbs in carburetor and parts cleaner overnight and then thoroughly clean and blow out the jets and orifices and reset the floats to factory specs.  If the floats appear to be holding fluid, replace them.  Use the best gas, air and oil filters that you can afford. Replace the fuel lines and add clear inline gas filters. Empty the gas tank and wash it out with soap and hot water, dry it out in the hot sun and spray WD-40 inside to reduce rust.  Every time you ride it, turn the gas petcock to the off position and let it idle until it runs out of gas, before storing.  Store the bike with the gas tank either empty or full. Use the best gasoline and synthetic oil that you can afford.  That is a classic bike.  Ride it hard.

Answer 6

Rust in the carburetors is from the fuel tank - open the gas cap and look inside with a flashlight.

Either repair the tank, or install an in-line fuel filter.

http://www.denniskirk.com/jsp/search/sea...

Use the 3 bottle combo pack.

The other kits are for repairing more tanks if you have left over chemicals from the first kit.

http://street.parts-unlimited.com/10/161...

Use 701C

Clean the carbs & jets.