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Moped Stuck on Full Revs

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Sam_brycee
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PostPosted: 17:35 - 30 Mar 2017    Post subject: Moped Stuck on Full Revs Reply with quote

When I start my Peugeot Speedfight 2 the throttle is on full and I have to cut the engine to stop it.the back wheel spins at full speed and only stops with the break. The throttle cable seems okay but I really am stuck here. Any help would be much appreciated.

Last edited by Sam_brycee on 19:14 - 30 Mar 2017; edited 1 time in total
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.....
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PostPosted: 17:36 - 30 Mar 2017    Post subject: Reply with quote

Air leak on the intake?
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jaffa90
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PostPosted: 17:39 - 30 Mar 2017    Post subject: Reply with quote

""""The throttle cable seems okay"""""
Could it be the choke on full?
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TbirdX
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PostPosted: 17:55 - 30 Mar 2017    Post subject: Reply with quote

Aren't all peds supposed to be ridden like that?

Jump on and impress the girlies, 1 hand wheelies for extra points.
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Sam_brycee
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PostPosted: 18:05 - 30 Mar 2017    Post subject: Reply with quote

jaffa90 wrote:
""""The throttle cable seems okay"""""
Could it be the choke on full?

The bike has an auto choke.
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Sam_brycee
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PostPosted: 18:06 - 30 Mar 2017    Post subject: Reply with quote

Joe wrote:
Air leak on the intake?

I'm 16 and a novice with Bikes/peds. Could you explain a bit better in terms that I would understand? Ahaha
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Sam_brycee
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PostPosted: 18:06 - 30 Mar 2017    Post subject: Reply with quote

TbirdX wrote:
Aren't all peds supposed to be ridden like that?

Jump on and impress the girlies, 1 hand wheelies for extra points.

Only if it worked like that ahah.
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Baggyman
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PostPosted: 18:30 - 30 Mar 2017    Post subject: Re: Moped Stuck on Full Revs Reply with quote

Sam_brycee wrote:
The throttle cable seems okay.


can you post photos of both ends please. Could just be the outer not seated

When you twist the throttle, does it feel right and return properly?
Photos at the carb end with the twist grip not twisted then twisted
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Billy Balthorpe
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PostPosted: 18:47 - 30 Mar 2017    Post subject: Reply with quote

It couldn't have always been like this, what did you do to it between it running ok and running flat out? Have you had the throttle slide out of the carb and not put it back in the right way round?
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RhynoCZ
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PostPosted: 18:51 - 30 Mar 2017    Post subject: Reply with quote

Sam_brycee wrote:
Joe wrote:
Air leak on the intake?

I'm 16 and a novice with Bikes/peds. Could you explain a bit better in terms that I would understand?


Yes,

Moped = A motorized bicycle that has pedals in addition to a low-powered gasoline engine designed for low-speed operation.

Scooter = A light motorcycle with small wheels and an enclosed engine.

When you twist the throttle and release it with the engine OFF, can you hear the click sound?
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Sam_brycee
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PostPosted: 18:56 - 30 Mar 2017    Post subject: Reply with quote

Billy Balthorpe wrote:
It couldn't have always been like this, what did you do to it between it running ok and running flat out? Have you had the throttle slide out of the carb and not put it back in the right way round?

I got the bike and it didn't run because it had no battery. Got a battery. Cleaned the carb so I might not have put the cable back in properly but I only took off the bottom part of it.
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RhynoCZ
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PostPosted: 19:03 - 30 Mar 2017    Post subject: Reply with quote

Sam_brycee wrote:
Yeah I can hear a click sound when I turn it .


So the throttle works as it should. Did you fiddle with the idle screw?
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Sam_brycee
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PostPosted: 19:03 - 30 Mar 2017    Post subject: Reply with quote

RhynoCZ wrote:


Yes,

Moped = A motorized bicycle that has pedals in addition to a low-powered gasoline engine designed for low-speed operation.

Scooter = A light motorcycle with small wheels and an enclosed engine.

When you twist the throttle and release it with the engine OFF, can you hear the click sound?


Yes I hear a click sound.
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Sam_brycee
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PostPosted: 19:04 - 30 Mar 2017    Post subject: Reply with quote

RhynoCZ wrote:
Sam_brycee wrote:
Yeah I can hear a click sound when I turn it .


So the throttle works as it should. Did you fiddle with the idle screw?


Nope not fiddled with it. Maybe the previous owner did?
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Sam_brycee
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PostPosted: 19:11 - 30 Mar 2017    Post subject: Re: Moped Stuck on Full Revs Reply with quote

Baggyman wrote:
Sam_brycee wrote:
The throttle cable seems okay.


can you post photos of both ends please. Could just be the outer not seated

When you twist the throttle, does it feel right and return properly?
Photos at the carb end with the twist grip not twisted then twisted


Closed
https://i.gyazo.com/6ab3238b7cf8fc99af868e6473aa2a3b.png
Open
https://i.gyazo.com/ab99fe753fccbfb490a11b164c60adc1.png
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Evil Hans
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PostPosted: 20:32 - 30 Mar 2017    Post subject: Reply with quote

RhynoCZ wrote:

Moped = A motorized bicycle that has pedals in addition to a low-powered gasoline engine designed for low-speed operation.

Scooter = A light motorcycle with small wheels and an enclosed engine.


I'm ok with someone calling a 50cc scooter a moped. People that refer to larger scooters as mopeds offend my inner sperg immensely.
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M.C
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PostPosted: 21:18 - 30 Mar 2017    Post subject: Reply with quote

Evil Hans wrote:
I'm ok with someone calling a 50cc scooter a moped. People that refer to larger scooters as mopeds offend my inner sperg immensely.

I've had people refer to my bike as a ped Evil or Very Mad
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jaffa90
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PostPosted: 21:42 - 30 Mar 2017    Post subject: Reply with quote

Sam_brycee wrote:
jaffa90 wrote:
""""The throttle cable seems okay"""""
Could it be the choke on full?

The bike has an auto choke.

I KNOW.
Also that carb slide / needle should be lower in pic 1.
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Sam_brycee
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PostPosted: 21:47 - 30 Mar 2017    Post subject: Reply with quote

jaffa90 wrote:

I KNOW.
Also that carb slide / needle should be lower in pic 1.

Do I adjust the air/mixture screw for that?
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RhynoCZ
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PostPosted: 23:18 - 30 Mar 2017    Post subject: Reply with quote

Don't touch the air/fuel mixture screw. Find the idle screw, start the engine and fiddle with that. The odds are the idle is just set sky high, for some reason.
The click sound, when you release the throttle means, the throttle gets to the idle position just fine.

A picture of the side of the carb would help, but I assume the brass screw with the spring is the idle screw. Thumbs Up
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Billy Balthorpe
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PostPosted: 00:00 - 31 Mar 2017    Post subject: Reply with quote

That little brass thing sticking out into the throat of the carb is stopping the throttle slide from going all the way down, start by unscrewing the brass screw (which looks like its wound all the way in) until the slide goes all the way down, start the engine and then adjust it to give you a sensible idle.
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jaffa90
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PostPosted: 00:18 - 31 Mar 2017    Post subject: Reply with quote

Sam_brycee wrote:
jaffa90 wrote:

I KNOW.
Also that carb slide / needle should be lower in pic 1.

Do I adjust the air/mixture screw for that?

Ok then check the auto choke as well.
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Sam_brycee
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PostPosted: 06:55 - 31 Mar 2017    Post subject: Reply with quote

RhynoCZ wrote:
Don't touch the air/fuel mixture screw. Find the idle screw, start the engine and fiddle with that. The odds are the idle is just set sky high, for some reason.
The click sound, when you release the throttle means, the throttle gets to the idle position just fine.

A picture of the side of the carb would help, but I assume the brass screw with the spring is the idle screw. Thumbs Up

Thanks Very much, I will try this today and I'll let you know how it goes.
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Sam_brycee
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PostPosted: 06:56 - 31 Mar 2017    Post subject: Reply with quote

Billy Balthorpe wrote:
That little brass thing sticking out into the throat of the carb is stopping the throttle slide from going all the way down, start by unscrewing the brass screw (which looks like its wound all the way in) until the slide goes all the way down, start the engine and then adjust it to give you a sensible idle.

Thanks, I shouldn't start it when it's all the way closed should I?
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Billy Balthorpe
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PostPosted: 00:21 - 01 Apr 2017    Post subject: Reply with quote

Yeah you can, it probably just wont tick over if its closed too far. Just wind the screw out until the slide closes completely then wind it back in half a turn, start it up and set the tickover at a point where it isn't pulling too much, job done.
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