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Main Area => General GS500 Discussion => Topic started by: Merkurio24 on March 10, 2007, 09:17:55 PM

Title: Fuel Punp
Post by: Merkurio24 on March 10, 2007, 09:17:55 PM
Is there a fuel punp on the Gs twins?
I have a friend who says it does, but I have never seen it :dunno_white:
Title: Re: Fuel Punp
Post by: Jughead on March 10, 2007, 09:24:02 PM
Nope it's Gravity Feed.
Title: Re: Fuel Punp
Post by: Merkurio24 on March 10, 2007, 09:35:06 PM
I new it!  my friend said it would not work without it :cookoo: Thank you for clarifying.
Title: Re: Fuel Punp
Post by: Wrecent_Wryder on March 11, 2007, 01:14:28 AM
F4
Title: Re: Fuel Punp
Post by: sledge on March 11, 2007, 01:48:00 AM
Ask him to show you where on the bike it is and point it out to you....then when he cant, call him a BS merchant.
Title: Re: Fuel Punp
Post by: Wrecent_Wryder on March 11, 2007, 02:16:57 AM
[4
Title: Re: Fuel Punp
Post by: Caffeine on March 11, 2007, 02:44:44 AM
Ask your friend if he's checked his turn signal fluid lately...

:icon_twisted:
Title: Re: Fuel Punp
Post by: Merkurio24 on March 11, 2007, 08:10:45 AM
Quote from: Caffeine on March 11, 2007, 02:44:44 AM
Ask your friend if he's checked his turn signal fluid lately...

:icon_twisted:
LOL... if I ask him that he will probably start thinking about it before he gets it!
Title: Re: Fuel Punp
Post by: Merkurio24 on March 11, 2007, 08:18:46 AM
Quote from: Wrecent_Wryder on March 11, 2007, 01:14:28 AM
Fuel injection bikes won't work without one, so almost all newer bikes do. Not sure I've ever seen one on a carbureted bike, but there must be some. That's one of the reasons that the traditional location of the fuel tank is where it is, above the engine.

The very low-pressure fuel feed is the reason we have to be very careful about the type of fuel filters we use.

I'm guessing that those few older bikes with the real fuel tanks in odd places, like under the seat, must have fuel pumps.
My friend had a 97 Honda CBR F3i (which he crashed and broke his arm in 3 pieces, and then sold it to me), and this bike has a fuel pump, this is probably why he thinks every bike should have one..
Title: Re: Fuel Punp
Post by: rob1bike on March 11, 2007, 11:11:40 AM
Thought it was next to the fluxcapacitor? Hmmmm.
Title: Re: Fuel Punp
Post by: starwalt on March 11, 2007, 11:47:17 AM
Quote from: rob1bike on March 11, 2007, 11:11:40 AM
Thought it was next to the fluxcapacitor? Hmmmm.

No, no. It is just above and to the left (as referenced from the rider sitting) of the ramifordistat  (pronounced rami-for-distat). This is a common misconception that we frequently try to correct here on GSTwin.
Title: Re: Fuel Punp
Post by: jeremy.karnes on March 11, 2007, 12:13:36 PM
Do the muffler bearings ever go bad on GS's???  I don't see them in the manual...........
Title: Re: Fuel Punp
Post by: rob1bike on March 11, 2007, 01:51:39 PM
I'm have'n a problem with the ion denoodle port. Its blown its flechpacking all over the ground...that happened on my harley all the time!
Title: Re: Fuel Punp
Post by: makenzie71 on March 11, 2007, 01:58:08 PM
Lots of carbureted bikes have fuel pumps...just about any supersport made after 1995 had one.  Honda has always been big on fuel pumps starting back with some of the early GL's.  My CB900C had a vac-operated diaphram pump.
Title: Re: Fuel Punp
Post by: Jughead on March 11, 2007, 04:17:14 PM
Lots Of Snwmobiles have Pumps too.
Title: Re: Fuel Punp
Post by: werase643 on March 11, 2007, 06:25:20 PM
Carb vehicles usually have fuel pumps when the carbs are above the tank... ya know, when the gravity won't push the fuel uphill into the carbs... usually low pressure and low velocity
Title: Re: Fuel Punp
Post by: Afzzr12 on March 11, 2007, 07:11:16 PM
my 02 kawa zzr1200 has 2 yes TWO fuel pumps.  Kind of crazy for Kawa to do that, but it is there.
Title: Re: Fuel Punp
Post by: ducati_nolan on March 11, 2007, 11:49:06 PM
you need a fuel pump if you put nitrous on your bike. It's basically a fuel injector so it needs more pressure to squirt the go go juice into the vroom vroom maker.
Title: Re: Fuel Punp
Post by: werase643 on March 12, 2007, 04:30:39 PM
Quote from: ducati_nolan on March 11, 2007, 11:49:06 PM
you need a fuel pump if you put nitrous on your bike. It's basically a fuel injector so it needs more pressure to squirt the go go juice into the vroom vroom maker.

I'll BITE.....WTF ARE YOU TALKING ABOUT?
what does NOx have to do with the operation of a carb?
NOx is under pressure but the fuel doesn't have to be.....
Title: Re: Fuel Punp
Post by: makenzie71 on March 12, 2007, 04:48:15 PM
I think he was "just saying"...
Title: Re: Fuel Punp
Post by: ducati_nolan on March 13, 2007, 10:40:13 PM
QuoteNOx is under pressure but the fuel doesn't have to be.....

Actually the fuel must be under pressure. When you hit the button on your nitrous system, it activates two solenoids, one for the nitrous and one for the fuel, the nitrous is obviously under pressure and rushes in, but the fuel must have some pressure otherwise it would just trickle out of the nozzle.

Most nitrous kits for carburated bikes come with a fuel pump. wet systems for cars oftentimes state that your fuel pump must be able to maintain a certain pressure or you need a bigger one or a second one. If you don't get enough gas with the nitrous, bad things happen.
:cheers:

Of course, you can always huff it, then you don't need a pump  :laugh: :nono:
Title: Re: Fuel Punp
Post by: Kasumi on March 14, 2007, 08:56:32 AM
My ZXR400 has a fuel pump and is carbureted and no the carbs arn't higher than the fuel tank lol  :laugh:
Title: Re: Fuel Punp
Post by: baco99 on March 14, 2007, 09:32:08 AM
it should have a pump, in my opinion.  makes carb design much simpler. 
Title: Re: Fuel Punp
Post by: ducati_nolan on March 14, 2007, 11:13:57 AM
Quoteit should have a pump, in my opinion.  makes carb design much simpler.

but it makes the bike design more complicated.

Unless there's a problem, keep it simple. Less parts=less parts to break=less things to troubleshoot when your bike stops working.
Title: Re: Fuel Punp
Post by: The Buddha on March 14, 2007, 11:20:41 AM
It has the greatest pump in the world man. it always works and never used any electricity.  :thumb:
Cool.
Srinath.
Title: Re: Fuel Punp
Post by: baco99 on March 14, 2007, 11:57:26 AM
i dunno, my old Mercedes 280 had a pretty genius diaphragm pump.  a lobe on the camshaft would push the diaphram in and out, causing the fuel to flow.  a check valve and float needle kept the fuel level in the bowl the same.  under full accel, the fuel would divert around the bowl and directly into a second sec of jets that were opened via a vacuum line.  and when the engine was cold, t-stat connected to the coolant hoses would adjust another vacuum line to add fuel until things warmed up and RPMs stabiized.  it was really a nice little system.
Title: Re: Fuel Punp
Post by: Merkurio24 on April 02, 2007, 03:32:15 AM
 :o
After all this time you're still posting on my simple question? :)