filter "in" tank

I was taking my gas tank apart the other day, getting it ready for paint..

When I noticed a noise in the tank...Well there is a rectangular filter loose in there..

Does anyone know what this is...I want to think it come off the fuel sending unit...

 

Nope - came off the petcock. It sits/mounts to the top of the petcock and acts as a pre-screen for any big bits that end up in the tank.

Here's a picture of what it SHOULD look like all-together:

 

Hi, oh yes. That is what did cause all my trouble with the carbs full of crap. The filter did fall apart. And the carb was collecting all the crap coming out of the tank. I would reckon to put on the filter again asap. Picture shows the petrol c**k of my tank without having a filter on it. I even don't know where the filter is right now.

Ramon

 

Ramon.
Do you not have an in-line filter between the petcock and the carbs?
If you don't you should fit one immediatly.

Faighaigh.

 

Faighaigh, no I don't. But I already replaced the petrol cock by another one including a filter. And yes, I already thought about mounting an in-line filter between the petcock and the carbs.
Ramon.

 

You'd think that Yamaha would have put a bigger lip on that thing to rest between the flange and the tank just inside the O ring. I just don't get it! It's kind of ironic that this thread came up as I was wondering about this very thing when I cleaned my tank out today, along with other things. I did learn how the petcock functioned also in utilizing a vacuum line to open it up when running, so it was a good day for me in growth. I also can't believe how much the stores want for a petcock rebuild kit...it's robbery!

 

kewl I figured it out after I got it out of the tank...Wish I could secure it some way where it wouldnt fall off...thanx ridz

 

Put the screen into the petcock as normal. Support the petcock body so you can use a hammer and a punch on it. Put the punch about 1/8" away from the plastic screen flange and give the punch a wack. The metal beside the screen mount will spread out and "tighten" the screens fit into the petcock body.

 

When I have a Petcock Filter element which will not stay pressed-in to its port within the Petcock ... I place a small band of Heat Shrink Tubing on to the filter extension pipe and shrink it on there.

Then, I re-seat the pipe.

 

Scrape.

I have paid out for 2 petcock repair kits and neither did any good at all I think other's here have had the same experience. I ended up buy an old one (complete) on ebay, works a treat.

Mick Faighaigh

 

Your a savior Mick because it would tick me off to fork out the money and not have it work. I saw some universal ones too at The Old Bike Barn but have to think about it. My petcock works fine but it leaks gas a tiny bit and I can't get it to stop. I'll start digging on Ebay and scope it out. Thanks again Mick.

 

Scrape.

There was a bloke on here a while ago fitted a petcock from a Kawasaki and reckoned that worked well after a little jiggery pokery to get it to fit his tank I don't think the whole thing cost more than a re-build kit.

Mick Faighaigh.

 

On the petcock rebuilds:

There are 2 problems that can cause a petcock to leak

1) There is a problem in the vacuum valve.

2) The rubber disc behind the selector valve is worn.

In my case it was the rubber disc which acts as the seal for the petcock handle and the fuel passages. It has lips on it that will wear out.

Brand new Yamaha disc from the dealership was $8.00.

I'm very impressed with the parts guys at the local Yamaha store. When I went to the counter and asked for a petcock rebuild kit parts guy said:

Big bucks and it will take a week to get it. Try replacing this disc, it is almost always the reason they leak and it's only $8.

 

found the very same thing in my tank yesterday 8O
must be the moon or sumpin eh???

:lol: :lol:

 

well, i noticed that last year when my dad and i cleaned my carbs, We tried to fix it, but no dice, haven't noticed it yet.. i think its common for theses bikes.. at least i think so since alot of people here are saying it happened to them..

 

Well, I thought about my petcock and the helpful hints from this thread and decided to buy a new universal one and ordered it today. My strainer seemed to stay in but the leaking had to go. The new one doesn't seem to have as fine of a strainer but it does appear to be metal...maybe brass. It looks to be stout and maybe it will stay attached better. I purchased the correct adapter plate to go with it too. Here's the link Universal petcock Something about a new petcock that give me a secure feeling. It won't drip for a long time and not leak past to mess up my oil and ruin my bike. I'm happy now!

 

Does anybody want to buy a good looking but leaky petcock? :lol:

 

so will putting a filter in the gas line remedy this situation?

 

I would say it would ridz, just as long as the in-line is as fine and as good as the petcock screen. One thing it will do is clog up easier not having the screen act as a prefilter. The petcock screen definitely has more surface area and will not clog up very easily. If it ever does then you got bad gas or it was severely neglected. I'm just wondering if the petcock could get clogged up if it was not there...would have to be big chunks of rust/debris maybe.

 

The List ... of what we should have on our bikes ... right now!

New Fuse Panel
Alternator Brushes
Starter Brushes
Inline Fuel Filter between petcock and Carbs.
Brighter Headlight Bulb
Auto Cam Chain Tensioners

 

Guess I've just been fortunate, but replacing the parts in my original petcock has worked fine. I didn't want to go with a standard petcock and have to remember to turn it off and on all of the time. (Although I'm sure it would become second nature and part of the "routine" after a while.)

My only gripe was that the "petcock rebuild kit" from my Yamaha dealer did not include the vacuum diaphragm -- it was just the rubber disc and o-rings. Not a big deal at the time because all I needed was the rubber disc (last year).

But, of course, my diaphragm recently developed some sort of leak in the outboard side and starting "spritzing" gas out of the breather hole, so I had to replace the diaphragm.

So I'm out more money than I would have liked, but it's working like a charm now.

Stay safe-
Herb

 

Herb, I went the same route as you. I was further frustrated by thinking even the new diaphragm didn't fix my problem since fuel flow was dicey. I ended up cycling the diaphragm a few times manually - gentle positive and negative pressure on the vacuum hose - to get it seated right or something, and now she works a treat and spent less than replacing the full petcock.

 

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