Starting from scratch :) tank&petcock questions
Starting from scratch :) tank&petcock questions
OK, so I have decided to take my bike from a mechanic (third one) after nobody would take repairs on it seriously. I will try to do it myself
I need to dig into the engine, 'cause my distribution chain (cam chain) spins but not much else (was told I need a new tensioner but nobody opened it).
I have decided to make an effort and do what I can to fix this bike, so I have started with tank and next are carbs.
So, PO said that tank was cleaned and coated inside to prevent rust but I don't know how to verify this - on the pic you can see rust marks that seem to really be coated on with some kind of emulsion. I wanted to clean the tank from inside with vinegar+chain, but maybe it is not needed or even would damage the coating. I did, however, find a broken filter inside a tank, and from a a petcock hole gunk was coming out (looks more like plastic than rust).
How can I make sure if it's coated?
Oh, yes, I forgot to mention, I know almost nothing about bikes but hopefully will soon
I need to dig into the engine, 'cause my distribution chain (cam chain) spins but not much else (was told I need a new tensioner but nobody opened it).
I have decided to make an effort and do what I can to fix this bike, so I have started with tank and next are carbs.
So, PO said that tank was cleaned and coated inside to prevent rust but I don't know how to verify this - on the pic you can see rust marks that seem to really be coated on with some kind of emulsion. I wanted to clean the tank from inside with vinegar+chain, but maybe it is not needed or even would damage the coating. I did, however, find a broken filter inside a tank, and from a a petcock hole gunk was coming out (looks more like plastic than rust).
How can I make sure if it's coated?
Oh, yes, I forgot to mention, I know almost nothing about bikes but hopefully will soon
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- stuff coming out :)
- _DSC9801-2.jpg (83.48 KiB) Viewed 10273 times
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- broken filter
- _DSC9800-2.jpg (71.97 KiB) Viewed 10273 times
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- tank inside
- _DSC9798-2.jpg (84.45 KiB) Viewed 10273 times
'79 cb650z RC03
Re: Starting from scratch :) tank&petcock questions
Another thing:
I'll need that filter replaced, but the petcock needs sorting out as well - at the "ON" position fuel flows, at the"STOP" it leaks a bit (tried blowing into it) and at "RES" nothing comes out.
I want to open it, but how do I open the rivets that are on the front face?? No screws.
I'll need that filter replaced, but the petcock needs sorting out as well - at the "ON" position fuel flows, at the"STOP" it leaks a bit (tried blowing into it) and at "RES" nothing comes out.
I want to open it, but how do I open the rivets that are on the front face?? No screws.
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- rivets?
- _DSC9806-2.jpg (82.67 KiB) Viewed 10272 times
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- will need another rubber O ring of sort
- _DSC9804-2.jpg (65.28 KiB) Viewed 10272 times
'79 cb650z RC03
Re: Starting from scratch :) tank&petcock questions
It sounds like someone coated the tank without properly removing the rust and etching the tank. The rust then continues to do it's thing under the coating. Eventually the coating is compromised. If you click the link in my signature, there is some tank cleaning information in there.
Some people have rebuilt their petcocks by drilling out the rivets. I'm not aware of a rebuild kit for them.
Good luck!
Some people have rebuilt their petcocks by drilling out the rivets. I'm not aware of a rebuild kit for them.
Good luck!
Have a problem with your CB650? Have a technical question? Click here!
My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
Re: Starting from scratch :) tank&petcock questions
For the tank: I guess it would take some chemicals to dissolve that coating, right? In that case I might leave it for a while, since I can't do it on my own (I'm working from a borrowed garage, bringing pieces to my apartment). Will flush it few times to get the hard stuff out.
Petcock: I drilled the rivets out and opened the petcock, the same stuff was inside, so I cleaned it. Will get pair of small bolts to close it again (none around)
This is "petcock unriveted"
Petcock: I drilled the rivets out and opened the petcock, the same stuff was inside, so I cleaned it. Will get pair of small bolts to close it again (none around)
This is "petcock unriveted"
- Attachments
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- cb650z petcock opened
- _DSC9808.jpg (72.95 KiB) Viewed 10265 times
'79 cb650z RC03
Re: Starting from scratch :) tank&petcock questions
Looks like it's in pretty good shape!
Sorry, I don't have any good suggestions for getting the old liner out.
Sorry, I don't have any good suggestions for getting the old liner out.
Have a problem with your CB650? Have a technical question? Click here!
My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
Re: Starting from scratch :) tank&petcock questions
What year model is it?
Did you clean the tank out?!?!?!?!
Re: Starting from scratch :) tank&petcock questions
cb650 wrote:What year model is it?
The flip cap on the tank shows it to be a 79 tank.
mojo
That tank does not look to me that it has been coated. The spots on the tunnel would not show if it has been. The stuff left in the petcock opening looks to be the remains of the flange that should be on the bottom of that plastic filter tube (in tank screen). Also the rubber o-ring that seals the petcock to the tank is missing. Those pieces are no longer available seperate from the petcock.
Your only option is to locate a replacement petcock. A new one is still available through your local honda dealer.
edit: incorrect part# removed
Last edited by MiGhost on Fri Dec 06, 2013 12:20 am, edited 1 time in total.
~ Ghost
PD50 Carb Info
82 CB650SC Brake Caliper Info
Stable
Wayward Son:1980 CB650C, RestoMod Period Custom Touring
Bad Moon: 1983 XJ750MK Midnight Maxim, Full Dress Tour Deluxe w/ X-1 Fairing
Nemesis: 1983 XJ750K Maxim, Old School style chopper
PD50 Carb Info
82 CB650SC Brake Caliper Info
Stable
Wayward Son:1980 CB650C, RestoMod Period Custom Touring
Bad Moon: 1983 XJ750MK Midnight Maxim, Full Dress Tour Deluxe w/ X-1 Fairing
Nemesis: 1983 XJ750K Maxim, Old School style chopper
Re: Starting from scratch :) tank&petcock questions
MiGhost, I've left the tank to dry out for a day, there is something on top of those rust marks, some kind of coating, I cannot feel the difference when I pass over it with my finger.
And yes, the rubber between petcock and the tank is gone into pieces, I hope I can find something not original to put there. Another thing is that filter, but I might try to put only inline filter between petcock and carbs if I can't find a original filter.
And yes, the rubber between petcock and the tank is gone into pieces, I hope I can find something not original to put there. Another thing is that filter, but I might try to put only inline filter between petcock and carbs if I can't find a original filter.
'79 cb650z RC03
Re: Starting from scratch :) tank&petcock questions
Thanks for the petcock inside picture.
Looks still great inside, it may be closed again just with bolts.
The reserve tube looks too short.
The filter is too coarse for the small stuff anyway but you need a clean tank if you want to go without it and use an inline filter instead. No problem then I think.
Note that this is no '79 but a European Z-model. Probably a late one so the '79 petcock thread of that part# above won't fit!
Looks still great inside, it may be closed again just with bolts.
The reserve tube looks too short.
The filter is too coarse for the small stuff anyway but you need a clean tank if you want to go without it and use an inline filter instead. No problem then I think.
Note that this is no '79 but a European Z-model. Probably a late one so the '79 petcock thread of that part# above won't fit!
Cosky's great (free) online manual: http://cosky0.tripod.com
forum links to common technical issues
If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum
forum links to common technical issues
If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum
Re: Starting from scratch :) tank&petcock questions
How long should the reserve tube be?
I think whoever did a job on the tank, didn't do a proper job, with coating the tank and also damaged a petcock filter. I will try to do without the filter on the petcock and just use the inline filter. Later on, I might try to find replacement or something.
I will clean carbs and flush out the tank, but my biggest worry is cam chain and tensioner, I need to get inside today to see what's going on there.
I think whoever did a job on the tank, didn't do a proper job, with coating the tank and also damaged a petcock filter. I will try to do without the filter on the petcock and just use the inline filter. Later on, I might try to find replacement or something.
I will clean carbs and flush out the tank, but my biggest worry is cam chain and tensioner, I need to get inside today to see what's going on there.
'79 cb650z RC03
Re: Starting from scratch :) tank&petcock questions
I think the tube should be about at least half the height of the filter screen. Can try to measure as my tank is empty now.
For the tensioner, here is what you really should take care:
viewtopic.php?f=4&t=8853&hilit=tensioner&start=23
For the tensioner, here is what you really should take care:
viewtopic.php?f=4&t=8853&hilit=tensioner&start=23
Cosky's great (free) online manual: http://cosky0.tripod.com
forum links to common technical issues
If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum
forum links to common technical issues
If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum
Re: Starting from scratch :) tank&petcock questions
Thanks for the link Volker, I've seen it already. Not much clearer what I need to do, but I will not know until I open it.
My problem is that I surely do not know what am I doing, so I will be taking a lot of photos and will come back here - with a lot of questions
My problem is that I surely do not know what am I doing, so I will be taking a lot of photos and will come back here - with a lot of questions
'79 cb650z RC03
Re: Starting from scratch :) tank&petcock questions
mojoblues wrote: My problem is that I surely do not know what am I doing ...
This may be problematic. What you need for sure is a small enought torque wrench. Reading through the corresponding manual section completely before even go to the bike is a good idea!
BTW: I measured the fuel tube, it is 85mm from the top rim of the nut. Custom tank/petcock however.
Cosky's great (free) online manual: http://cosky0.tripod.com
forum links to common technical issues
If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum
forum links to common technical issues
If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum
Re: Starting from scratch :) tank&petcock questions
Volker_P wrote:mojoblues wrote: My problem is that I surely do not know what am I doing ...
This may be problematic.
If I could do it, he can do it!
Have a problem with your CB650? Have a technical question? Click here!
My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
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