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Old 06-13-2013, 02:17 PM   #1
richardthescooter1   richardthescooter1 is offline
 
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Crying I'm thinking fuel pump:

The other day at WOT my scoot shut off, even giving it a little gas in carb, would only run until it was used up, had my buddy haul it home, today started and its acting the same way. Now its dying when I'm trying to give it throttle, it idle good. I'm ready to put a electric pump on. What do you Dawgs think?



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Old 06-13-2013, 04:20 PM   #2
spandi   spandi is offline
 
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Did you try the Mikuni first?
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Old 06-13-2013, 04:39 PM   #3
richardthescooter1   richardthescooter1 is offline
 
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That's what I have, been on the bike before I bought scoot, had scoot since feb of 2011 and I have over 15,000 mile on her. My main problem is at WOT, I read that at WOT vacuum is about 0, today as I rode anything over 50mph it starts choking, like its not getting gas.



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Old 06-13-2013, 04:43 PM   #4
richardthescooter1   richardthescooter1 is offline
 
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Here is pump
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Old 06-13-2013, 09:19 PM   #5
spandi   spandi is offline
 
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15,000 miles? It might be time for one of these.

http://www.juniorspecialties.com/cat...roducts_id=274

Didya also check your jets for gunk?



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Old 06-14-2013, 04:22 PM   #6
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Are you sure it is a round mikuni and not a Chinese JinBo knock-off?

Mine is the same bike as yours, and it had a JinBo pump which started to fail on me. I just replaced it with the new rectangular genuine mikuni vac-pump, and it starts right up first hit now, and the motor idles a lot better.

I thought about going with an electric, but I worried about wiring it up. I have seen people wire them to something like the radio hot wire, which is only hot when the key is on.

My concern is that if I turn on the key and then have to step away for a moment that the always on electric pump will flood the carb... Or, do the elec pumps have built in safeguards against that?

Smoak
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Old 06-14-2013, 04:42 PM   #7
richardthescooter1   richardthescooter1 is offline
 
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spandi, I've adjusted float, a/f, but I've never check or clean carb jets. smoak here is my pump
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Old 06-14-2013, 05:29 PM   #8
smoak   smoak is offline
 
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Quote:
Originally Posted by richardthescooter1 View Post
spandi, I've adjusted float, a/f, but I've never check or clean carb jets. smoak here is my pump
I don't think I have ever seen a Mikuni that looked quite like that!

I got my rectangle Mikuni on eBay for about $20 shipped. I don't know how much an electric costs, but it might be worth your while if they are expensive to pick up a $20 pump.. If nothing else you would have a good spare!

If you go electric, please let us know how you end up wiring it, and if it gives you flooding problems.

Smoak
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Old 06-14-2013, 10:49 PM   #9
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The Mikuni I have is round. (nicknamed it "The Hockey Puck" after Don Rickles )

http://www.amazon.com/Mikuni-Fuel-Ou...ound+fuel+pump
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Old 06-15-2013, 09:15 AM   #10
richardthescooter1   richardthescooter1 is offline
 
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Hi spandi, yesterday JR suggested for me to check the ignition wire on my CDI in case that was the problem, last nigh I check it and it was loose, fix it and now nice and tight, today I'm going take carb off and clean all those jets, and I may still upgrade the fuel pump, the one you showed me, what is the capacity (gph)?
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Old 06-15-2013, 12:57 PM   #11
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I found this from Mikuni. Although the DF52-176 isn't listed, I have no reason to think it would not be the same as the other round models, at 35 liters per hour or about 9 and a quarter gallons per hour U.S.

http://www.mikuni.com/c-fuel_pumps.html

P.S. just be sure whatever model you choose the nozzles line up with the way the hoses are going.

P.S. P.S. I was thinking maybe this is not just one particular thing going wrong, but maybe a series of small malfunctions happening at the same time, i.e. "The perfect storm" syndrome.

Last edited by spandi; 06-15-2013 at 09:58 PM.
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Old 06-15-2013, 06:57 PM   #12
richardthescooter1   richardthescooter1 is offline
 
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Thumbs Up

Well today I decided to take my carb off and check those jets, This is the first time I ever took the jets out, man were they clogged up, the main jets had maybe two open holes and the pilot jet only one, soaked them good and long and wire in the holes and cleaned the with carb spray and used my air nozzle to blow air through them, got carb back in and running, now I just have to put everything else back together and then the test drive.
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Old 06-15-2013, 08:00 PM   #13
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Hope everything works out, even if it didn't cause the scoot to conk out going uphill, a gunked up carb couldn't have been a good thing.

Last edited by spandi; 06-15-2013 at 09:58 PM.
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Old 06-17-2013, 12:13 PM   #14
richardthescooter1   richardthescooter1 is offline
 
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Doh!

test drove scoot (yep shut off going up to 50mph,) got scoot back home after pushing her about a 1/4 mile, chech fuel line from tank to pump (gas is flowing good), took off pump and looked in side, as far as I could tell pump look ok), put back on and cranked, (no go) sprayed carb cleaner in intake line and scoot well start and runn for a few seconds, gas in fuel filter about a foot from carb. I think fuel pump.
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Old 06-19-2013, 10:23 AM   #15
richardthescooter1   richardthescooter1 is offline
 
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I orderd fuel pump, should be here maybe today, will let you guys know how it goes.
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