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Author Topic: ::Rust in my Gas Tank:: {pictures inside}  (Read 1451 times)
CB1_Boost
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« on: April 27, 2008, 03:04:45 PM »

After much speculation that I had rust in the gas tank we finally opened her up to see whats up.

Much to my dismay I found lots of rusty/oily etc. rust inside.  And it wasn't just a little bit and it kept on coming. 

Its an '89 CB-1 with only 9K miles but on with the pictures.. 



I've now taken the tank to a radiator shop so they can clean it out with chemical compounds and re-coat the inside so hopefully it'll prevent it from happening again.
In case you're wondering I bought the bike like this and have had it for less than a month.
Lesson:  Winterize your bikes and don't let gas sit in the tank.   Smiley


« Last Edit: June 25, 2008, 04:17:18 AM by CB1_Boost » Logged
clarkdw
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« Reply #1 on: April 27, 2008, 06:32:19 PM »

That sucks. I hope that it stays away. You should for sure put on a new fuel filter, but you probably already know that. Cry It might also be a good idea to clean out the carbs after you get it all fixed up and while the tank is still off.
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CB1_Boost
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« Reply #2 on: April 27, 2008, 06:51:32 PM »

It might also be a good idea to clean out the carbs after you get it all fixed up and while the tank is still off.

Yea I thought about cleaning the carbs but not quite sure how to do so.  Anyone have a write up or know how to do it?  I heard it shouldn't be too hard but I don't know.  And yea I need to find a shop that carries the fuel filter.  I'll be looking around this week.   Smiley

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Drewski
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« Reply #3 on: April 29, 2008, 06:41:50 AM »

It might also be a good idea to clean out the carbs after you get it all fixed up and while the tank is still off.

Yea I thought about cleaning the carbs but not quite sure how to do so.  Anyone have a write up or know how to do it?  I heard it shouldn't be too hard but I don't know.  And yea I need to find a shop that carries the fuel filter.  I'll be looking around this week.   Smiley



Aye, it's fairly straight forward to clean out the jets on the carbs. I'll dig out an old set of carbs for some pics and point out what's what. First you'll need to get them off the bike though.

Tank's off already, next is the airbox. You'll need to undo the sub-filter which is the small black box attatched to the main air filter, (while this is off, it might be an idea to check the filter inside - they tend to rot and turn into dust. You can replace with any foam of a similar density). The California models are slightly different so not sure if you will have anything else to take off.

Next; Unclip the wiring loom and plug leads from either side of the airbox. It's a good idea to get pics of how they all go and, if not done already, label each plug lead.

Remove the lid of the airbox by undoing the screws around the outside, these can be a bit tight so use yer best driver on them.

Remove the element and undo the bottom part of the filter box by the two bolts. Remove the pipes connected to the airbox and take off the lower part.

Undo choke cable clamp and remove cable.

Loosen the intake jubilee clips and pull the carbs back.

Loosen the adjusment on the throttle cables and remove them from the carb body, (bit fiddly).

Remove the fuel feed pipe.

Your carbs should now be free to remove.

I've got the CB-1 Workshop manual in pdf format here, it has all the info you will need, how can I get it to you?
« Last Edit: April 29, 2008, 10:20:05 AM by Drewski » Logged

Cb1 Derfull
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« Reply #4 on: April 29, 2008, 07:42:53 AM »

The description for removeing the carbs is right on. The actual removwing of the carbs can be rather hard depending on if they have ever been of before. The rubber carb boots can get dry making the carb a real pain in the a$$ to get off. Lots of WD-40 and a heat gun to soften the carbs boots will help. If you are lucky they will pull right off.

You can coat the inside of your tank with a couple of different products. POR-15 makes a tank sealant kit and KREEM makes a kit also.
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CB1_Boost
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« Reply #5 on: April 29, 2008, 01:54:55 PM »

Wow, very good info there mate!!  Thanks for the replies.

I tried removing the cover lid for the air filter and it the screws are way too tight.  I'll have to get a powered drill to take the suckers off. 
From what you've said so far it kind of seems like a complicated process but I might go for it.  We'll have to see if the screws want to come off or not. 
And yes you're right about the rubber boots etc.  It is an old bike and I don't think the previous owner has ever taken out the carbs so they could be stuck in there pretty good.
I sent you my e-mail Drewski.  Appreciate it mate.

I'll keep yall updated.   Smiley
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Drewski
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« Reply #6 on: April 30, 2008, 06:10:36 AM »

Have e-mailed you the link for the manual, to get the carbs "unstuck" I use a wooden bar between the carbs and cylinder block and frame to lever them off. When off, if you're unsure which jets to remove, I can stick a pic up of the carbs I have here pointing out the offending ones. For the stubbourn screws on the airbox, I'd use a T-bar screwdriver after tapping them first using a hammer and a scrwedriver blade with no handle to shock them free.
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Cb1 Derfull
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« Reply #7 on: May 16, 2008, 02:27:47 PM »

Hit ebay and start looking for a new tank. . . .I see them come up about once every month and a half or so.
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CB1_Boost
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« Reply #8 on: May 23, 2008, 03:36:56 AM »

 Smiley
« Last Edit: June 25, 2008, 04:17:59 AM by CB1_Boost » Logged
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