rm

Joined:
2006-06-21 05:57:03

Posts: 14

Posted:Tuesday 11 September, 2007 10:31 PM

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Subject: Cleaning the tank and fuel system in a 1974 CB 750

I recently had my fuel tank on my 74 CB 750 painted. About a month ago I tried to start it and it was not getting any gas to the carbs. I pulled the bowls and hardly any fuel was there. I found that the small brass screen in the petcock bowl was clogged with what looked like sanding residue (reddish brown). After cleaning the screen it was getting gas and ran fine. This morning the same thing happened, I went to start it and it seemed to not be getting fuel? I plan to remove the tank and drain it. Also to drain the carburator bowls. I'm praying that I don't have to pull the carbs and clean them out again. But now that I'm thinking about it I probably should take them out, spray them and blow them out with air? What is the best product for cleaning out a tank and fuel system? I've heard of something called Kreem? But isn't that for rusted out tanks? Thanks if you can help

Rick

rm

Joined:
2006-06-21 05:57:03

Posts: 14

Posted:Friday 14 September, 2007 12:48 AM

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Subject: Re: Cleaning the tank and fuel system in a 1974 CB 750

My fuel tank is not rusted out, it is actually in great shape for a 74.I had it painted this Summer and I think the shop allowed dust to get into it. I have twice cleaned the petcock filter out from red gunk that must be primer residue. I don't need to use Kreem I am just looking for a way to rinse out some painting goop that keeps clogging my fuel system. Thanks

Rick

rm

Joined:
2006-06-21 05:57:03

Posts: 14

Posted:Wednesday 17 October, 2007 11:25 PM

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Subject: Re: Cleaning the tank and fuel system in a 1974 CB 750

Thanks to all who replied to my question regarding my fuel tank trouble. I ended up pulling the carbs and cleaning them completely. I also found a great product from KBS coatings. My fuel tank did have some rust in it, not alot for 33 years. But enough to cause the jets to clog and the engine to starve for gas. KBS worked super, I was worried about it damaging a new paint job but all I had to do was flush off any spills right away with water. I used a washing solution, then an acid etch, then after completely drying the tank using a heat gun I poured in the coating. The excess was removed and the tank sat for 4 days to cure. No more rust problems, unlike other products KBS does not leave a thick gooy coating, just a nice smooth silver layer which looks like the factory could have put it in. A 33 year old fuel tank with internal rust now looks brand new and will give me many more years of trouble free use. If you need to fix your old bike tank or even a car or boat system check out KBS coatings, they are great.

RM