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Bike running fine then started jerking and stopped

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Johna2
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Joined: 30 Mar 2018
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PostPosted: 16:27 - 30 May 2018    Post subject: Bike running fine then started jerking and stopped Reply with quote
Was riding along nice at 60mph on a dual carriage way for 20 mins,then my bike started to jerk and slow down. I pulled over and now it won’t start. The breakdown service came out said I would check the fuel pump first.I watched a video on this and the guy said to suck on the air pipe and if fuel comes out of the gas line then the fuel pump is working fine, which I did and fuel is coming out.. Any ideas what this could be ..I’ve just had a new carb fitted 2 months ago

I have attached a video of what it’s doing now.
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Octapode
Two Stroke Sniffer



Joined: 04 May 2018
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PostPosted: 17:12 - 30 May 2018    Post subject: Reply with quote
Did you try it on reserve tank?

If it's not that, first thing would be to check for spark.
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Johna2
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PostPosted: 17:15 - 30 May 2018    Post subject: Reply with quote
Octapode wrote:
Did you try it on reserve tank?

If it's not that, first thing would be to check for spark.

I have a spark checked that battery charged and half of tank of gas
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Johna2
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PostPosted: 17:46 - 30 May 2018    Post subject: Reply with quote
mpd72 wrote:
If it has a fuel pump, does it pump fuel to the carb when the ignition is turned on?

Is there fuel in the float bowl of the carb?


How can I tell if if there fuel going to the carb my pipe lines are not see through I try sucking on the air line and fuel did come out if the gas line going to the carb..it was on video I seen on YouTube

Haven’t taken the carb out yet but will try that next .didnt think it would be the carb as brand new 2 months ago
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WmY
Renault 5 Driver



Joined: 21 May 2018
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PostPosted: 17:58 - 30 May 2018    Post subject: Reply with quote
AJS A9 125cc? Has it actually got a fuel pump?

I'm told it has a "vacuum fuel cock", and if the vacuum line is split, that could be trouble. This could OFC be rubbish.

Last edited by WmY on 18:12 - 30 May 2018; edited 1 time in total
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Octapode
Two Stroke Sniffer



Joined: 04 May 2018
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PostPosted: 18:00 - 30 May 2018    Post subject: Reply with quote
Take the fuel line off the carb and switch the pump on. If fuel comes out, fuel is getting to the carb. Then, crack the drain plug on the carb open and see if fuel comes out of there. If fuel does come out, you have fuel in the float bowl. If it still won't start after both of those come out as positive, clean your jets.
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Johna2
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PostPosted: 18:13 - 30 May 2018    Post subject: Reply with quote
WmY wrote:
AJS A9 125cc? Has it actually got a fuel pump?
not sure of it had a fuel pump it isn’t he ajs flight a9
That’s just what the breakdown guy said to check I’ve attacjed some photos of the inside
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Evil Hans
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Joined: 08 Nov 2015
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PostPosted: 18:16 - 30 May 2018    Post subject: Reply with quote
Not 100%, but I think it's a vacuum system with no pump.

As an aside, you really need to sort that cabling out. The throttle lever is going to chew through that bundle of wires if you leave it like that!
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Johna2
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PostPosted: 18:29 - 30 May 2018    Post subject: Reply with quote
Evil Hans wrote:
Not 100%, but I think it's a vacuum system with no pump.

As an aside, you really need to sort that cabling out. The throttle lever is going to chew through that bundle of wires if you leave it like that!


Yeah I will sort that after carb now this is how the garage left it haven’t looked at since then
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Kawasaki Jimbo
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PostPosted: 20:15 - 30 May 2018    Post subject: Reply with quote
Johna2 wrote:
I’ve just had a new carb fitted 2 months ago.

Why? There could be a clue there.
Also, visual fuel level can be deceptive. Put some more in and try again. Don't ask me how I know. Wink
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Johna2
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PostPosted: 20:19 - 30 May 2018    Post subject: Reply with quote
Kawasaki Jimbo wrote:
Johna2 wrote:
I’ve just had a new carb fitted 2 months ago.

Why? There could be a clue there.
Also, visual fuel level can be deceptive. Put some more in and try again. Don't ask me how I know. Wink


The diaphragm split so bought a new carb as could only get a diaphragm I needed from China which took 5 weeks to come.i ordeeed it any way and I have just put it in the old carb sogoing to swap them over first see if that works just getting back home now
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WmY
Renault 5 Driver



Joined: 21 May 2018
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PostPosted: 21:28 - 30 May 2018    Post subject: Reply with quote
Johna2 wrote:
WmY wrote:
AJS A9 125cc? Has it actually got a fuel pump?
not sure of it had a fuel pump it isn’t he ajs flight a9
That’s just what the breakdown guy said to check I’ve attacjed some photos of the inside


If it isn't an AJS Flight F9, what is it?

I cannot see any attached pictures.
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Evil Hans
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PostPosted: 21:54 - 30 May 2018    Post subject: Reply with quote
Johna2 wrote:
not sure of it had a fuel pump it isn’t he ajs flight a9


I didn't even attempt to decipher that bit Wink
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WD Forte
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Joined: 17 Jun 2010
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PostPosted: 15:04 - 31 May 2018    Post subject: Reply with quote
Firstly

WHAT FUCKING BIKE/SCOOT FFS ?

The vid suggests a scoot with a GY6 lump
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