I see that the item I was asking about is a vacuum fuel pump. I
applied vacuum to this and fuel flows out fuel line. Filled up bowl
and scooter starts and idols fine again. But still has same
pulsating/ no power when throttle is applied. Ran two blocks at low
throttle and barely made it home, almost like fuel was used up from
carb and ran dry??? Could this vacuum pump still be going bad? Would
it be worth the extra $$ to get the micro electric fuel pump and
replace the stock one? Thanks

QUOTE:

It does have the Walbro Carb. Had my mechanic look at it, he

doesn\'t

QUOTE:
think it is a carb issue. Diaphram was in perfect shape, I did

clean

QUOTE:
jets out just because I had it off the bike.( scooter only has

around

QUOTE:
300 KM on it )

When I took the fuel line off the carb it had no fuel running out,

I

QUOTE:
had a clamp just in case. Should this have line pressure from the

tank

QUOTE:
on this line all the time? And after putting carb on the scooter I

am

QUOTE:
getting no fuel to the bowl. Could that metal fitting at the

bottom of

QUOTE:
the fuel tank be faulty. And by the way what is it and what does

it

QUOTE:
do. It has one fuel line and one air line plugged into it.

Thanks David



--- In Strada-Vento-QJ-UM- ChineseScooters@yaho ogroups.com, "Clive"
<clive@> wrote:

QUOTE:

Hi:
You probably have a Keizo pd18j carb. Doubt you will find a

parts

QUOTE:

QUOTE:
diagram or replacement parts. May just be easier to replace

with a

QUOTE:

QUOTE:
new carb like this one if it looks same as you have:
http://cgi.ebay.com/ ebaymotors/WALBRO- CARBURETOR-FOR-50cc-

CHINESE-

QUOTE:
SCOOTER-TANK-
ROCKETA_W0QQcmdZView ItemQQcategoryZ84149 QQihZ006QQitemZ16017 3022263

QUOTE:

as long as you are sure its the carb and not an ignition issue.
Clive.

that device on the bottom of the fuel tank is a vacume operated fuel petcock
ther eis a line going from in front of the carb all the way back to it if
you pull that line off and the one line form the carb off and suck on the
front line fuel should flow form the carb line if not then your petcock
coudl be fualty
Paul

----- Original Message -----
From: "David Sallee" < This e-mail address is being protected from spam bots, you need JavaScript enabled to view it >
To: <Strada-Vento-QJ- UM- ChineseScooters@yaho ogroups.com>
Sent: Tuesday, October 30, 2007 7:07 PM
Subject: [Strada-Vento-QJ-UM- ChineseScooters] Re: Hitong X1 50cc


It does have the Walbro Carb. Had my mechanic look at it, he doesn\'t
think it is a carb issue. Diaphram was in perfect shape, I did clean
jets out just because I had it off the bike.( scooter only has around
300 KM on it )

When I took the fuel line off the carb it had no fuel running out, I
had a clamp just in case. Should this have line pressure from the tank
on this line all the time? And after putting carb on the scooter I am
getting no fuel to the bowl. Could that metal fitting at the bottom of
the fuel tank be faulty. And by the way what is it and what does it
do. It has one fuel line and one air line plugged into it.

Thanks David



--- In Strada-Vento-QJ-UM- ChineseScooters@yaho ogroups.com, "Clive"
< This e-mail address is being protected from spam bots, you need JavaScript enabled to view it > wrote:

QUOTE:

Hi:
You probably have a Keizo pd18j carb. Doubt you will find a parts
diagram or replacement parts. May just be easier to replace with a
new carb like this one if it looks same as you have:
http://cgi.ebay.com/ ebaymotors/WALBRO- CARBURETOR-FOR-50cc- CHINESE-

SCOOTER-TANK-
ROCKETA_W0QQcmdZView ItemQQcategoryZ84149 QQihZ006QQitemZ16017 3022263

QUOTE:

as long as you are sure its the carb and not an ignition issue.
Clive.

if it works liek I said then no you won\'t neeed the electic fuel pump I
think your carb needs adjusting.
Paul

----- Original Message -----
From: "David Sallee" < This e-mail address is being protected from spam bots, you need JavaScript enabled to view it >
To: <Strada-Vento-QJ- UM- ChineseScooters@yaho ogroups.com>
Sent: Tuesday, October 30, 2007 9:07 PM
Subject: [Strada-Vento-QJ-UM- ChineseScooters] Re: Hitong X1 50cc


I see that the item I was asking about is a vacuum fuel pump. I
applied vacuum to this and fuel flows out fuel line. Filled up bowl
and scooter starts and idols fine again. But still has same
pulsating/ no power when throttle is applied. Ran two blocks at low
throttle and barely made it home, almost like fuel was used up from
carb and ran dry??? Could this vacuum pump still be going bad? Would
it be worth the extra $$ to get the micro electric fuel pump and
replace the stock one? Thanks

QUOTE:

It does have the Walbro Carb. Had my mechanic look at it, he

doesn\'t

QUOTE:
think it is a carb issue. Diaphram was in perfect shape, I did

clean

QUOTE:
jets out just because I had it off the bike.( scooter only has

around

QUOTE:
300 KM on it )

When I took the fuel line off the carb it had no fuel running out,

I

QUOTE:
had a clamp just in case. Should this have line pressure from the

tank

QUOTE:
on this line all the time? And after putting carb on the scooter I

am

QUOTE:
getting no fuel to the bowl. Could that metal fitting at the

bottom of

QUOTE:
the fuel tank be faulty. And by the way what is it and what does

it

QUOTE:
do. It has one fuel line and one air line plugged into it.

Thanks David



--- In Strada-Vento-QJ-UM- ChineseScooters@yaho ogroups.com, "Clive"
<clive@> wrote:

QUOTE:

Hi:
You probably have a Keizo pd18j carb. Doubt you will find a

parts

QUOTE:

QUOTE:
diagram or replacement parts. May just be easier to replace

with a

QUOTE:

QUOTE:
new carb like this one if it looks same as you have:
http://cgi.ebay.com/ ebaymotors/WALBRO- CARBURETOR-FOR-50cc-

CHINESE-

QUOTE:
SCOOTER-TANK-
ROCKETA_W0QQcmdZView ItemQQcategoryZ84149 QQihZ006QQitemZ16017 3022263

QUOTE:

as long as you are sure its the carb and not an ignition issue.
Clive.

David,

There is a vacuum line to the gas valve.( there are 3 lines to this valve. 1 from the tank, 1 fuel to carb, and 1 vacuum from the carb) You can check the valve by disconnecting the vacuum line at the carb, disconnecting the fuel line at the carb and put a vacuum (suck) on the vacuum line. The suction should open the valve and fuel will run. If it doesn’t, either the valve is bad or there is another block in the fuel line somewhere. Or maybe the vacuum line has disconnected and makes the valve inoperative. But if the carburetor isn’t getting gas, it’s probably the lines or valve.



-----Original Message-----
From: Strada-Vento-QJ-UM- ChineseScooters@yaho ogroups.com [mailto:Strada- Vento-QJ-UM- ChineseScooters@yaho ogroups.com] On Behalf Of David Sallee
Sent: Tuesday, October 30, 2007 7:08 PM
To: Strada-Vento-QJ-UM- ChineseScooters@yaho ogroups.com
Subject: [Strada-Vento-QJ-UM- ChineseScooters] Re: Hitong X1 50cc

It does have the Walbro Carb. Had my mechanic look at it, he doesn\'t
think it is a carb issue. Diaphram was in perfect shape, I did clean
jets out just because I had it off the bike.( scooter only has around
300 KM on it )

When I took the fuel line off the carb it had no fuel running out, I
had a clamp just in case. Should this have line pressure from the tank
on this line all the time? And after putting carb on the scooter I am
getting no fuel to the bowl. Could that metal fitting at the bottom of
the fuel tank be faulty. And by the way what is it and what does it
do. It has one fuel line and one air line plugged into it.

Thanks David

--- In Strada-Vento-QJ-UM- ChineseScooters@yaho ogroups.com (Strada-Vento-QJ-UM- ChineseScooters% 40yahoogroups.com), "Clive"
< This e-mail address is being protected from spam bots, you need JavaScript enabled to view it > wrote:

QUOTE:

Hi:
You probably have a Keizo pd18j carb. Doubt you will find a parts
diagram or replacement parts. May just be easier to replace with a
new carb like this one if it looks same as you have:
http://cgi.ebay.com/ ebaymotors/WALBRO- CARBURETOR-FOR-50cc- CHINESE-

SCOOTER-TANK-
ROCKETA_W0QQcmdZView ItemQQcategoryZ84149 QQihZ006QQitemZ16017 3022263

QUOTE:

as long as you are sure its the carb and not an ignition issue.
Clive.

__._,_.___

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__,_._,___

It\'s not a vacuum pump, it\'s a vacuum actuated valve, and I doubt
very much if it\'s going bad based on the results of your test. These
bikes are gravity fed and do not need a pump.

--- In Strada-Vento-QJ-UM- ChineseScooters@yaho ogroups.com, &quot;David
Sallee&quot; &lt; This e-mail address is being protected from spam bots, you need JavaScript enabled to view it &gt; wrote:

QUOTE:

I see that the item I was asking about is a vacuum fuel pump. I
applied vacuum to this and fuel flows out fuel line. Filled up bowl
and scooter starts and idols fine again. But still has same
pulsating/ no power when throttle is applied. Ran two blocks at low
throttle and barely made it home, almost like fuel was used up from
carb and ran dry??? Could this vacuum pump still be going bad?

Would

QUOTE:
it be worth the extra $$ to get the micro electric fuel pump and
replace the stock one? Thanks

QUOTE:

It does have the Walbro Carb. Had my mechanic look at it, he

doesn\'t

QUOTE:
think it is a carb issue. Diaphram was in perfect shape, I did

clean

QUOTE:
jets out just because I had it off the bike.( scooter only has

around

QUOTE:
300 KM on it )

When I took the fuel line off the carb it had no fuel running

out,

QUOTE:
I

QUOTE:
had a clamp just in case. Should this have line pressure from the

tank

QUOTE:
on this line all the time? And after putting carb on the scooter

I

QUOTE:
am

QUOTE:
getting no fuel to the bowl. Could that metal fitting at the

bottom of

QUOTE:
the fuel tank be faulty. And by the way what is it and what does

it

QUOTE:
do. It has one fuel line and one air line plugged into it.

Thanks David



--- In Strada-Vento-QJ-UM-

ChineseScooters@yaho ogroups.com, &quot;Clive&quot;

QUOTE:

QUOTE:
&lt;clive@&gt; wrote:

QUOTE:

Hi:
You probably have a Keizo pd18j carb. Doubt you will find a

parts

QUOTE:

QUOTE:
diagram or replacement parts. May just be easier to replace

with a

QUOTE:

QUOTE:
new carb like this one if it looks same as you have:
http://cgi.ebay.com/ ebaymotors/WALBRO- CARBURETOR-FOR-50cc-

CHINESE-

QUOTE:
SCOOTER-TANK-

ROCKETA_W0QQcmdZView ItemQQcategoryZ84149 QQihZ006QQitemZ16017 3022263

QUOTE:

QUOTE:

QUOTE:

as long as you are sure its the carb and not an ignition issue.
Clive.

If you start the bike, then take off the air filter does it get better
or worse?
If worse, I would check the manifold to make sure there are no leaks
or cracks. Could also be you have a weak spark so double check all
spark plug cable connections.
If it gets better, you could have a blocked air filter (dust or oil).
Since the issue seems to be above idle, it could also be your main jet
is still blocked or the float level is too low (latter would me more
unusual since floats tend to go other way over time).
Clive.