Bowl Fill Mystery By bikedown (Read 1,484 times)

[sprocket]

Yeah for the aggravation, I would buy a new carb...keep the old one for parts...

[Alleyoop]

Yep best suggestion a new carb can be had pretty cheap $30-40 bucks may even find it cheaper. Just make sure the Fuel Ratio Screw is Available so the Fuel Ratio Mixture can be adjusted. Some come with it PLUGGED up so you have to drill out the plug to get at the screw.


What scoot do you have is it a 150cc or what. The 150s take a 24mm carb. The 50s 18-19mm Carb.

Alleyoop

[bikedown]

thank you for yours everyone.

double checked lines they are straight.

tank full, which does not mean much as weight feed is interupted by petcock, i have flow to carb, doused engine three times now checking that.

I do not know what this statement means===

Check the bowl vent and make sure it's not clogged.

is the bowl vent the little plastic tube that hangs from top of carb.??

from "bashan" fella, and thanks for explaining in advance in future posts.

got to say it has been mostly a joy to learn the whole carb on this juorney

I think i could draw one in my sleep.

and yes on this kiln carb it is VERY impossible to put plunger in backwards, spring clip will not allow it.

I put q tips in drill and polished the plunger chute and polished the plunger,

it was sticking before i did this, they had "brown" stuff on both.

to day is sunday, I must rest, or be crazy rest of week.

I will go back at it tomarrow and destroy my last not up cut up finger.

untill then--

peace by patience between all people.

[sprocket]

That brown stuff is varnish from the old gas.. you want to run a fine wire through the main jet and remove it from inside there as well. If you have it in the float bowl it is in the main jet too...

[bikedown]

Apr 15, 2012 12:41:15 GMT -6 sprocket said:

That brown stuff is varnish from the old gas.. you want to run a fine wire through the main jet and remove it from inside there as well. If you have it in the float bowl it is in the main jet too...

did run wire and sprayed out both jets with gum out and thank you.

that brown crap is profound tanacitions and hard to move, don't any body ever think you can wish it away with carb cleaner.

I got the bike running--
more on that next post

[pumpman]

I have a 50cc that when the bowl is dry the only way i can get it going is to disconect the air cleaner and hold my hand over the carb air inlet hole , like you are choking it manualy. This seems to work every time.You might have to do it 3 or 4 times .Good luck.

[bikedown]

Apr 15, 2012 14:39:11 GMT -6 pumpman said:

I have a 50cc that when the bowl is dry the only way i can get it going is to disconect the air cleaner and hold my hand over the carb air inlet hole , like you are choking it manualy. This seems to work every time.You might have to do it 3 or 4 times .Good luck.

yes you are a wise man, I would study HVAC if were you, you would take to those waters easy.

getting a bowl filled from dry is a issue, that would be a great way to suck it full again.

[bikedown]

GOT THE BIKE RUNNING

bowl did not want to fill, but i hung a long 5 ft hose filled with gas off the intake side of filter then to engine and suddenly i watch some of the gas go down in funel at top of '' Carb I V ""hose and it started.

I have a slow flow situaion to carb, But i have started bike now.

it smoked like hell , idle is awful and i have backfires at deceleration.

I think piston and head where filthy from all the bad starts and carb and fuel tank carb cleaner additive.

after it ran a while idle got better and needed no throttle and then died.

I want to put some seafoam down air intake and let sit then latter rev it out?

john deer filter was blown out hard with gum out.

I think the bowl plunger while dry just got stuck, I coated the plunger with olive oil and that freed it up while dry, why olive oil, it melts better then mineral oil once gas goes over it.

I am afraid to ride the bike any where, sounds awlful.

any suggestions would be greatly helpful and recieved.

what a great place to get info.

thank you thank you !!!

john deer filter below

cleans very will, but must have good gravity feed hose "plumb" and that makes all the difference.

[sprocket]

Make certain that filter is in the line the right way around.. it should have a flow arrow on it...the big end points towards the carb..downstream...

[bikedown]

Apr 15, 2012 15:45:08 GMT -6 sprocket said:

Make certain that filter is in the line the right way around.. it should have a flow arrow on it...the big end points towards the carb..downstream...

when you say big end

you mean the side with the milky ring around out side should be closest to carb???

[Alleyoop]

Yes, you want the gas to go through the filter from the outside not from the inside of the filter.

Also the fuel line from the tank to the carb should be going Downhill no ups and downs since it is gravity fed it always has to be flowing going downhill to the carb.

Alleyoop

[bikedown]

Apr 15, 2012 16:03:46 GMT -6 Alleyoop said:

Yes, you want the gas to go through the filter from the outside not from the inside of filter.

Also the fuel line from the tank to the carb should be going Downhill no ups and downs since it is gravity fed it always has to be flowing going downhill to the carb.

Alleyoop

very good reminder for a bike and engine that is so dependent on gravity, I repositioned lines and blew out filter again.

put seafoam in air intake and let sit, then blew it out at half wot,

Questions--

bike has a horrific idle, won't stay running

1.
I am running very lean, engine gets hot very quick, bike is usually rich, can that be a partally clogged jet. i have done so much with lines off and on, maybe theres dirt in there again.


2.
can the timing be affected by adjusting the timing chain adjuster.



3.
might adjusting the valves make things better.

Boy we are going around the world here,

thanks everybody.

[Alleyoop]

Here is how to adjust it your Fuel Ratio Mixture:
Alleyoop
ADJUSTING YOUR FUEL RATIO SCREW:

FOLLOW THIS PROCEDURE, take your time DO NOT Be turning the SCREW fast and wait in between turns otherwise you will be off.

Warm Up the SCOOT for at least 5 minutes.

YOU WANT THE HIGHEST IDLE OUT OF THE FUEL RATIO SCREW YOU CAN GET.

ADJUST YOUR FUEL RATIO:

1. Turn the Fuel Ratio Screw Counter Clockwise 1/4 and wait 10-15 seconds to allow the engine to catch up with the new setting.

** IF ON THE FIRST TURN IT DOES NOTHING OR IDLE GOES DOWN- GO to 2.*** Otherwise GO to a. below.

a. If the IDLE GOES up repeat 1.
b. If the IDLE does not go up or it does nothing turn the Fuel Ratio Screw 1/8 Clockwise that should be the highest IDLE you can get out of the Fuel Ratio Screw-- GO to FINISH UP.

2. Turn the Screw Back 1/4 and GO to 3..

3. Turn the Fuel Ratio Screw Clockwise 1/4 and wait 10-15 seconds to allow the engine to catch up with the new setting.

** IF ON THE FIRST TURN IT DOES NOTHING YOUR PILOT JET AND OR PASSAGES ARE CLOGGED*** GO to CLEAN CARB*** Otherwise GO to a. below.

a. If the IDLE GOES up repeat 3.
b. If the IDLE does not go up or it does nothing turn the Fuel Ratio Screw 1/8 Counter Clockwise that should be the highest IDLE you can get out of the Fuel Ratio Screw-- GO to FINISH UP.

FINISH UP:
SET IDLE USING IDLE SPEED SCREW:
USING the IDLE SPEED SCREW set the Idle to 1500-1800 where it IDLES the smoothest AND the REAR WHEEL IS NOT Spinning-

TEST YOUR ADJUSTMENT:
Now while on the Center Stand GIVE THE THROTTLE a GOOD QUICK TWIST and Let go,
It should REV UP with with a nice VROOOOOOOOOM with no Bogging or Hesitation and Come back down to where you set your Idle.
DONE RIDE SAFE.

CLEAN CARB:
Take Carb Bowl off and clean Pilot Jet and Pilot Jet Passage and Main Jet and Passage.
Then come back and repeat this procedure.

[bikedown]

thanks great chart


yes i am getting very little change with a/f adjustment

so I will soak jets tomarrow and clean again

with all this change out i have done may have gotten dirt in line again.


what does anyone think of these ideas

1.
I am running very lean, engine gets hot very quick, bike is usually rich, can that be a partally clogged jet. i have done so much with lines off and on, maybe theres dirt in there again.


2.
can the timing be affected by adjusting the timing chain adjuster.



3.
might adjusting the valves make things better.

and thanks

[roketafan]

def adjust valves also spray out carb with compressed air also