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Lifan LF40QT-26a 50cc 2 stroke scooter engine 1PE40QMB

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Posted on Jan 02, 2017

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SOURCE: how do i derestrict my lifan s-ray 50cc 4-stroke

Unless you find a small "restricting washer" between the head and the exhaust pipe...Then usually there is no easy means. In the past these "washers" were put in place to reduce performance, the idea was as the riders skills improve the washer can be removed. It also was a way for parents to keep their children from zooming flat out everywhere.

Posted on Dec 03, 2009

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Is my 2005 qiangiang gmi 108 a 2 stroke or a 4 stroke


Hi, David engine design is very easy to identify:
TWO STROKE
1. Two strokes red line around 12,000-16,000 RPM.
2. A reed valve is in between the carburetor and cylinder head.
3. The exhaust has an expansion chamber.
4. The muffler has a small diameter tail pipe.
5. The exhaust has a high pitched Bap Bap sound.
6. Small scooters and small dirt bikes are generally 2 Stroke.
7. Older models had adjustable throttle actuated oil injection.
8. Older models had a premix ratio of 2 stroke oil and gas.
FOUR STROKE
1. Four strokes red line around 6,000-8,000 RPM.
2. Four strokes have camshafts and valves.
3. Mufflers have large diameter outlets.
4. The exhaust has low pitch deep rumble sound.
5. 350cc and larger engines are usually 4 strokes.
6. Four strokes have separate oil tanks that feed an oil pump.
For more information about your issue and valuable "FREE" downloads that you will need for viewing and printing please click on the blue links below. Good luck and have a wonderful day.
2005 GMI Motor Sports GMI 108 Scooters
http://www.family-motorsports.net/GY6-50cc-150cc.pdf
Qianjiang Scooter Parts Racing Planet USA
Full size Scooter Parts
http://absolutelyscooterparts.net/pdf/CGEN_dawg_scooter_manual.pdf

Aug 02, 2017 | Motorcycles

1 Answer

Is it possible that a 50cc Chinese scooter will continue Spark the spark plug rather than fired at each timing point. As a result rather then start it kicks back on the starter


being a 50cc engine it should have only 1 piston
If it is a 2 stroke , it will fire every time the piston comes to tdc
if it is a 4 stroke it has to have a timing point that excites the ignition system for every 4th stroke tdc
if the exciter receives a signal to fire the plug at the wrong time , it is getting that signal from a fault or incorrect timing
that fault can be
loose wire/s,worn unit that controls the timing ( distributor fault), loose flywheel , flywheel touching coil,incorrect timing (180 degrees out ) stator loose ,rotor loose,faulty crank position sensor
it is good practice to have a workshop manual on hand and if you don't have one go google and type in --workshop manual for 50 cc tao scooter--and see if there is a pdf version in english to download

Mar 05, 2016 | Tao New Scooter 50cc Street Legal New Look

1 Answer

Hi, anyone know what the factory carb settings are for an aeon mini kolt 50cc. Having problems with getting it started, changed spark plug and battery


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1 Answer

2005 people 50 2 stroke. Why won't it start?


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Purchase our "NO SPARK KIT" click the link below: ... My scooter has no spark how to fix. gy6 chinese scooter 139qmb qmb13950cc 150cc.

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1 Answer

Oil in engine scooter


to start with is it a 4 stroke or 2 stroke. If it is a 2 stroke the oil goes in with the petrol. If a 4 stroke look for a removable plug in the crankcase

Jul 15, 2013 | Aprilia OEM Aprilia pegaso o-ring 159

1 Answer

Lifan 50cc scooter not starting. I replaced choke solenoid and cleaned the carb. Am getting spark and putting sight vacuum on on hose leading to gas tank valve does produce gas flow in hose attached to...


It requires three main things to start the scooter:--- 1)Gas. 2) Spark. 3) Cylinder compression.---------- Any of the one is not functioning right so scooter is not starting.------------ Its possible that gas is not flowing till the carb and that is causing the problem.Either gas valve is clogged or faulty.Or gas line is clogged or carb itself is dirty and gunked up inside and needs to be cleaned.--------- Click this link below and follow the troubleshooting :--- http://whatisbyme.blogspot.com/2011/08/lifan-50cc-scooter-not-starting.html ----------- This will help.Thanks.Helpmech.

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1 Answer

Lifan metro scooter wont turn off


have a look at the cdi plug ...one of the terminal in the plug cluster may have a broken wire or not making good connection with the cdi.

Jan 13, 2010 | Quad 47 cc / 49 cc Pocket Mini Bike...

2 Answers

How do i derestrict my lifan s-ray 50cc 4-stroke scooter please? forgot to add its a honda based engine and its a 59 plate thanks


Unless you find a small "restricting washer" between the head and the exhaust pipe...Then usually there is no easy means. In the past these "washers" were put in place to reduce performance, the idea was as the riders skills improve the washer can be removed. It also was a way for parents to keep their children from zooming flat out everywhere.

Dec 03, 2009 | 2006 Honda ANF125 Innova

1 Answer

Engines dies when going up hill


It isn't a fuel problem, it is a power problem. Any bike will slow down on a hill. The bigger the engine, the more power is available to maintain speed. 50cc just isn't much power to pull a 150 pound man up a hill.

I am assuming the scooter has a two stroke engine. If it is a four stroke the valves may be needing attention. But even with good valves, 50cc just isn't a powerhouse of an engine. If you want to be happy, trade the scooter in on something 125cc to 200cc. You will feel better about your ride and be more respected on the roadway.

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