corrosion in carbs - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 8 (permalink) Old 11-06-2013, 03:04 PM Thread Starter
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corrosion in carbs

I just completed a very thorough carb clean, and found a fair amount of corrosion in the float chambers and the area where the jets are. Idle jets were partially plugged with it, as well as some of the holes in the emulsion tube. No wonder Seafoam was not helping. It almost certainly came from ethanol gas. The gas part evaporates first, leaving the ethanol, which is highly corrosive. If your bike is going to sit very long at all, I would drain the carbs. Carb cleaner will not do anything with corrosion, I had to scrape it off the aluminum. I may even start filling my carbs with WD-40 if the bike is going to sit for a while.

I am a motorcyclist, NOT a biker.


1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
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post #2 of 8 (permalink) Old 11-06-2013, 03:19 PM
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I plan to ride mine till the road starts icing in the morning then starting it every week at least. Sometimes in January here in the Carolinas we get a nice 70+ degree day.

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post #3 of 8 (permalink) Old 11-06-2013, 04:52 PM
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I do the same thing in winter here in NJ....but be sure to let it run long enough to warm up and get the oil flowing properly before shutting it down or you will wind up doing more damage than good.
Cold starts are tough on the internals that the oil may have drained off of, plus moisture will develop if you don't warm it up enough to burn it off.

ALSO: Keep the tank filled/topped off so mo moisture can't collect in the tank.
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post #4 of 8 (permalink) Old 11-06-2013, 05:03 PM
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Yep, ethanol sucks. But even good gas can dry up and turn to sand/concrete, I've had to literally chip it out of carb bowls that evaporated dry.

If I was going to leave one sit, I'd go to the ethanol-free pump, then treat the gas. We get warm days too, so I plan to ride this winter. 70+ today!

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post #5 of 8 (permalink) Old 11-06-2013, 10:23 PM Thread Starter
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Closest real gas is over 200 miles away. I could put 100 octane race gas in it for storage, but it is awfully expensive. Riding season is just starting here, so it will get ridden for the next few months. It sat for most of the summer, with an occasional short distance night ride, and the engine started running worse and worse. I found the left side coasting enrichener diaphragm was melted (gas does not melt rubber) and replaced it. It ran a lot better, but still had a misfire. The carbs are now spotless, and I an going to do my best to keep them that way.

I also found a long time ago that if you are going to store a bike without starting it, kerosene will protect the tank and carbs. Then you can drain it out and use it in a heater or stove.

I am a motorcyclist, NOT a biker.


1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike
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post #6 of 8 (permalink) Old 11-06-2013, 10:52 PM
..have a vulcan good day!
 
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Quote:
Originally Posted by VN750Rider/Jerry View Post
Closest real gas is over 200 miles away. I could put 100 octane race gas in it for storage, but it is awfully expensive. Riding season is just starting here, so it will get ridden for the next few months. It sat for most of the summer, with an occasional short distance night ride, and the engine started running worse and worse. I found the left side coasting enrichener diaphragm was melted (gas does not melt rubber) and replaced it. It ran a lot better, but still had a misfire. The carbs are now spotless, and I an going to do my best to keep them that way.

I also found a long time ago that if you are going to store a bike without starting it, kerosene will protect the tank and carbs. Then you can drain it out and use it in a heater or stove.
Yes, Kerosene or Gasoline with a Marvel Mystery Oil (2 cycle) mix lasts years (Chain Saw & Weed Eater 2 Cycle gasoline) ....without deposits or problems.
For many years I have stored all equipment, to include Sno-Mobiles, accordingly, then burn the fuel as needed.
Kerosene (K-1) works !

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Last edited by WilliamTech; 11-06-2013 at 11:04 PM.
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post #7 of 8 (permalink) Old 11-06-2013, 11:05 PM
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Stabul marine ethanol treatment works well.i only missed about a week of riding last year

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post #8 of 8 (permalink) Old 11-06-2013, 11:23 PM
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My carbs were all gunked up the exact same way as yours. Took em apart and soaked them in carb cleaner. My bike sat for about 2 years with a leaky PC so I'm sure that's why mine were crappy

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