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Full throttle to start the engine/then behaves normally

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vybrano
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Joined: 24 May 2019
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PostPosted: 04:16 - 31 May 2019    Post subject: Full throttle to start the engine/then behaves normally Reply with quote
automatic transmission/electric starter/electric choke on carburetor

When I want to start, I have to go full throttle (and I mean FULL). And engine sounds like I didn't even touch the throttle. Quiet. But 5 seconds after starting, throttle starts to behave normally, if I go full, it really screams. But not during starting. It also likes to die in idle.

I just finished taking apart carburetor and cleaning it, which didn't change anything. Question
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Sister Sledge
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Joined: 17 Aug 2018
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PostPosted: 06:17 - 31 May 2019    Post subject: Reply with quote
*Sigh* I'll say it before other people do..

Make and model of bike please? It's a bike yes?
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trevor saxe-coburg-gotha
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Joined: 22 Nov 2012
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PostPosted: 06:24 - 31 May 2019    Post subject: Reply with quote
signs point to yank

approach w/ caution
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Robby
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Joined: 16 May 2002
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PostPosted: 14:22 - 31 May 2019    Post subject: Reply with quote
Its the electric choke and/or the idle circuit. If you didn't remove the mixture screw and blow carb cleaner down the hole when you cleaned the carb then the circuit could be clogged.
Otherwise, electric choke isn't working. Usually because it isn't plugged in, the wiring to it is knackered, or the plunger is stuck closed.
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vybrano
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Joined: 24 May 2019
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PostPosted: 14:46 - 31 May 2019    Post subject: Reply with quote
Robby wrote:
Its the electric choke and/or the idle circuit. If you didn't remove the mixture screw and blow carb cleaner down the hole when you cleaned the carb then the circuit could be clogged.
Otherwise, electric choke isn't working. Usually because it isn't plugged in, the wiring to it is knackered, or the plunger is stuck closed.


I found a video on a testing electric choke. I will do that tomorrow.

Mixture screw was cleaned.
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Nobby the Bastard
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Joined: 16 Aug 2013
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PostPosted: 14:50 - 31 May 2019    Post subject: Reply with quote
Does the fuel tap have a vacuum setup on it? It sounds like the carb is filling the float chamber with fuel and then it works properly.

Does it drink fuel like I, erm, drink Stella?
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Robby
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PostPosted: 14:56 - 31 May 2019    Post subject: Reply with quote
Nobby the Bastard wrote:


Does it drink fuel like I, erm, drink Stella?


Naked, alone and crying?
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Nobby the Bastard
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PostPosted: 15:01 - 31 May 2019    Post subject: Reply with quote
Robby wrote:
Nobby the Bastard wrote:


Does it drink fuel like I, erm, drink Stella?


Naked, alone and crying?


Can you speak up? I'm wearing a dressing gown.
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vybrano
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Joined: 24 May 2019
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PostPosted: 16:02 - 31 May 2019    Post subject: Reply with quote
Nobby the Bastard wrote:
Does the fuel tap have a vacuum setup on it? It sounds like the carb is filling the float chamber with fuel and then it works properly.

Does it drink fuel like I, erm, drink Stella?


I remember during todays cleaning of carburetor: Rubber hose from fuel tank to carburetor continued to bleed after disconnecting it from carburetor. This shouldn't happen? Or should?

--------------EDIT-----------------

I spent last hour Googling and you opened a whole new world to me. So what I think that I understand now is, that problem is my 2 port petcock. Which is drowning my carburetor. Because I should have there 3 port petcock. With additional intake of vacuum from carburetor, that would regulate flow of fuel.

Previous owner replaced 3 port petcock with 2 port. And threw away vacuum line. And I should go back to solve this problem.

Is that right?
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Easy-X
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Joined: 08 Mar 2019
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PostPosted: 00:41 - 01 Jun 2019    Post subject: Reply with quote
IIRC a vacuum activated petcock just saves you remembering to turn a tap I don't think it does much in the way of regulating the flow of fuel.

My money's on the choke.
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vybrano
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PostPosted: 01:35 - 01 Jun 2019    Post subject: Reply with quote
HardlyDavidson wrote:
IIRC a vacuum activated petcock just saves you remembering to turn a tap I don't think it does much in the way of regulating the flow of fuel.

My money's on the choke.


I was never manually closing/opening a petcock. I just let it sit with petcock ON since I bought it. Confused Confused Confused

Right now I'm about to go do that test on choke anyway, so I will see.
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Old Thread Alert!

The last post was made 6 years, 83 days ago. Instead of replying here, would creating a new thread be more useful?
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