Magna Owners Of Texas

Public Forums => The Garage => Topic started by: TLRam1 on November 20, 2008, 11:01:09 PM

Title: Fuel Delivery Problem
Post by: TLRam1 on November 20, 2008, 11:01:09 PM
Symptoms

1. After carb jet and shim job, extremely hard to start. Ran the battery down, hooked up a starter/charger and repeated tries, in-between to let the starter cool, it finally started.

2. When fuel runs out (if not switched soon enough) and switched to reserve it will die until you can coax it into starting back up.

3. Switched to Reserve at 82 miles.     

Checked the petcock and pulled out the gas tank screen, all was clear. Next was to go further down the feed line to the Vacuum Shut-off valve. Here I found gas on both sides of the diaphragm, should only be on one side the other vacuum side should be dry unless someone can enlighten me as to why.

I didn't see a hole and would think it would have to be a decent leak for this to occur unless there is little vacuum to work with. The vacuum line looks to draw from the forward right intake so I still could have a partial blockage towards the carb area.

I could do a couple of test.

1.   Run the carbs out of fuel and blow in the line that feeds the carbs and attempt to notice blockage.

2.   Since the carbs will be empty when I reinstall w/another diaphragm I will know                     how difficult the bike will be to start.

3.   Does anyone have a extra diaphragm (locally) in case I can't locate one in the Dallas Mid-cities area?

What it looks like.
(http://i471.photobucket.com/albums/rr80/MOOT-Photos/DSCN8151.jpg)


The vacuum side and you can see it's wet, should be dry.
(http://i471.photobucket.com/albums/rr80/MOOT-Photos/DSCN8152.jpg)


Here is the plunger which shuts off fuel delivery to the carbs when your engine is off.
(http://i471.photobucket.com/albums/rr80/MOOT-Photos/DSCN8153.jpg)
Title: Re: Fuel Delivery Problem
Post by: roboto65 on November 21, 2008, 06:26:14 AM
No there should not be fuel on the other side there is a good little vacuum when the engine is running. If you need the bike then until you find one since the old one is bad you can cut the middle of the flap out just leave the sealing part leaving like an Oring to seal the pieces together.
The fuel will just be cut off at the petcock instead of the diaphragm...
Title: Re: Fuel Delivery Problem
Post by: Chad in Michigan on November 21, 2008, 06:48:21 AM
If you only said this a few days earlier-- i just sent the one off my mike to another forum member who suspected the same thing... :( i eliminated mine completely. it's easier/cheaper to do that than to buy one new. i think they run 50-80 bucks new. i have one line from the tank going into a fuel filter that splis the line (1 in/2 out) and run the two lines to the carb banks. not that hard to do either. just a thought. :)
Title: Re: Fuel Delivery Problem
Post by: TLRam1 on November 21, 2008, 09:38:19 AM
Chad, I considered leaving it off but prefer to keep it stock. If the needle valves in the carbs stop working than overflow sets in. On vintage bikes a few guys sheared their starter pin due to gas running into cylinders, when they hit the starter too much displacement was taken up with fuel. Not saying that would happen here.

Thanks for the thought, I was too tired to work on it earlier to snatch up yours. They are between 35-50.00 total.

Hopefully this is it.
Title: Re: Fuel Delivery Problem
Post by: roboto65 on November 21, 2008, 09:48:05 AM
I see them on Ebay there was just one on there for cheap...
Title: Re: Fuel Delivery Problem
Post by: TLRam1 on November 21, 2008, 09:57:24 AM
Allen, I saw that one also. I was hoping to know before the auction closed but I was too darn tired. Thanks
Title: Re: Fuel Delivery Problem
Post by: roboto65 on November 21, 2008, 10:26:23 AM
Well i have his email if you want to ask him about the part he may sell it if it did not sell.. Here it is cfdistributing@msn.com
Title: Re: Fuel Delivery Problem
Post by: KTC on November 21, 2008, 11:33:01 AM
this should help http://majman.net/fly_loader.html
Title: Re: Fuel Delivery Problem
Post by: TLRam1 on November 21, 2008, 01:06:59 PM
Allen, that sold.

KTC - what did you do that for!   :evil: Now I can't get off the computer.  :-P
Title: Re: Fuel Delivery Problem
Post by: KTC on November 21, 2008, 03:22:06 PM
Don't you just HATE those games when you have plenty of other things to do?!?
Title: Re: Fuel Delivery Problem
Post by: Slydynbye on November 21, 2008, 03:55:42 PM
11 Swats,  91%  40.65 seconds  Ha Beat that!! :lol:
Title: Re: Fuel Delivery Problem
Post by: TLRam1 on November 21, 2008, 03:59:48 PM
Kelly, your foam is in the mail.

24 swats & 42% awful
Title: Re: Fuel Delivery Problem
Post by: KTC on November 21, 2008, 04:30:10 PM
thanks Terry!!!!  keep up the swatting
Title: Re: Fuel Delivery Problem
Post by: roboto65 on November 21, 2008, 06:22:11 PM
No No my favorite is this one http://www.addictinggames.com/kittencannon.html?cid=YSSP
Title: Re: Fuel Delivery Problem
Post by: TLRam1 on November 21, 2008, 06:35:19 PM
684 feet
Title: Re: Fuel Delivery Problem
Post by: Jester on November 21, 2008, 08:14:54 PM
896 feet  8)
Title: Re: Fuel Delivery Problem
Post by: roboto65 on November 21, 2008, 09:11:23 PM
1303 HEHEHEHEHE
Title: Re: Fuel Delivery Problem
Post by: Charles S Otwell on November 21, 2008, 10:55:18 PM
I think some of you guys need, THERAPY (a different kind) :D :D
Title: Re: Fuel Delivery Problem
Post by: roboto65 on November 22, 2008, 06:41:06 AM
Shhhhhhhhhhhhhhhhhhhh the yard gnomes are listening!!!!!!! :lol: :lol:
Title: Re: Fuel Delivery Problem
Post by: TLRam1 on November 22, 2008, 06:49:19 PM
Quote from: roboto65 on November 21, 2008, 09:11:23 PM
1303 HEHEHEHEHE


(http://i203.photobucket.com/albums/aa214/TLRam1/Smilies/headbanger2tf.gif)OK OK I can't go any faster!
Title: Re: Fuel Delivery Problem
Post by: KTC on November 22, 2008, 07:05:01 PM
don't you just hate the yard gnomes cold silent stare? :cool:
Title: Re: Fuel Delivery Problem
Post by: TLRam1 on November 22, 2008, 09:07:37 PM
Quote from: roboto65 on November 21, 2008, 09:11:23 PM
1303 HEHEHEHEHE

>>>>>1421<<<<!!!!
Title: Re: Fuel Delivery Problem
Post by: KTC on November 23, 2008, 05:55:45 PM
thanks Terry, i received the foam and installed it today, out ran Greg all over the place!!!
Title: Re: Fuel Delivery Problem
Post by: TLRam1 on November 23, 2008, 06:52:57 PM
Quote from: KTC on November 23, 2008, 05:55:45 PM
thanks Terry, i received the foam and installed it today, out ran Greg all over the place!!!

That's some high performance foam!  :-P :-P I kicked it up a notch for you.
Title: Re: Fuel Delivery Problem
Post by: Greg Cothern on November 24, 2008, 09:17:05 PM
In his DREAMS!

If he wants to put his pink slip up I have mine out and ready!  :lol:
Title: Re: Fuel Delivery Problem
Post by: dgc67 on November 25, 2008, 06:10:29 AM
Those Venus Fly Traps suck!   :shock:
Title: Re: Fuel Delivery Problem
Post by: dgc67 on November 25, 2008, 06:21:44 AM
OK.  I went for shortest distance record (more fits my style)
28 feet!!
Title: Re: Fuel Delivery Problem
Post by: KTC on November 25, 2008, 10:00:49 AM
i dont have any "pink slips"   :?
Title: Re: Fuel Delivery Problem
Post by: L J VFR on November 25, 2008, 12:36:21 PM
My daughter beat me in Wii  Bowling last night.  She is now almost pro like me... 8)
Title: Re: Fuel Delivery Problem
Post by: Slydynbye on November 25, 2008, 01:47:24 PM
Shortest 22 feet Longest 1239
Yes I'm still Playing............................................................................................
Title: Re: Fuel Delivery Problem
Post by: roboto65 on November 25, 2008, 06:35:30 PM
Have a Wii on the boat Pro in Bowling too LOL and the Kitty game is addicting LOL
Title: Re: Fuel Delivery Problem
Post by: KTC on November 26, 2008, 08:42:35 AM
what was the skipper of the Valdez name?????
Title: Re: Fuel Delivery Problem
Post by: roboto65 on November 26, 2008, 01:51:24 PM
Yeah well that was different I do not drink and play Wii LOL :shock:
Title: Re: Fuel Delivery Problem
Post by: KTC on November 26, 2008, 03:10:50 PM
wii wii
Title: Re: Fuel Delivery Problem
Post by: TLRam1 on December 08, 2008, 08:34:27 PM
On my one test to Waco and back this seemed to correct my fuel issue. I ran the fuel down in the carbs to see how fast gas would refill the bowls when installed. It also appeared to pump somewhat when I hit the starter looking at my fuel filter. If not for the somewhat large paper fuel filter this might not make a difference.

The vacuum has a pulsating feel as I ran the motor so I could see how this might act as a semi-pump verses just a fuel cup-off.   
Title: Re: Fuel Delivery Problem
Post by: L J VFR on December 09, 2008, 03:28:14 AM
No joke, bowled a 299 sunday night on the wii.  On my last frame  my 6 pin didn't kick out the 10 pin.  I spared it making a 299.    Highest score yet.  My previous was a 242.   Pro in golfing too. 8-)