Question about 1971 Aermacchi Sprint 350

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Jonway speedy 50cc moped....2 stroke or 4?

Make of moped not listed so just picked 1st on list...we have a Jonway speedy 50cc can we find out if it is 2 stroke or 4 stroke?

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  • Jerry Aug 07, 2013

    If you mix gas and oil it's two stroke if the oil and gas are separate it's 4 stroke generally 4 stroke is louder but not all the time


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What year is it ? Is the cylinder-head height or shape capable of holding a rocker shaft and valve ?

Posted on Sep 19, 2009

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Why wont my 50cc gator moped start has fuel and spark

Hi, Ruth and the usual suspects are:
1. Fuel tank empty.
2. Fuel supply valve/petcock turned off.
3. Fouled spark plugs.
4. Engine flooded as a result of overuse of the enricher.
5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
6. Fuel valve/petcock or filter clogged.
7. Fuel line to the carburetor or throttle body pinched or kinked.
8. Carburetor float stuck.
9. Fuel injectors clogged.
10. Severely discharged or damaged battery you need 12.5 volts or better and be able to pass a load test if necessary.
11. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
12. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and CDI box.
Spark plug cables in bad condition and shorting check for leakage in the dark, cable connections loose, or connected to the wrong cylinders.
13. Ignition timing incorrect due to a faulty MAP, CKP, O2, TPS, sensors.
14. Faulty neutral, clutch lever, or kickstand safety switch.
15. Faulty fuel pump or fuse or relay.
16. Faulty CDI box.
17. A stuck bent or burnt valve.
18. Tip over sensor needs a reset.
19. Check for engine trouble codes.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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Service Support China Jonway Group

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1 Answer

What wire harness do I need for a GY6 CHINESE SCOOTER 139QMB

Hi, Marsha for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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GY6 50 4 Stroke 139QMB 1P39QMB
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Jun 20, 2015 | Motorcycles

1 Answer

What spark plug do i buy gor my jonway YY50QT-6 MOPED

Hi, Steve for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Jonway, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
AKA Roketa Scooter MC 07 50 Baja SC50 Strada RX 50 Jalon JL50QT 21 falcon...

Jun 19, 2015 | Jonway Motorcycles

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Hi I have a Jonway 50cc scooter. the problem i'm having is after starting it (which is a real effort) every time i pull the throttle back i lose power and stall. Note.. I have picked aprilia on the below...

i charged the battery and put it in but nothing comes on when i turn the key I know nothing about scooters I was given this one and am just trying to get it to run.

Jan 23, 2011 | Aprilia AF1 125 Sintesi Motorcycles

1 Answer

I need a cylander,head, piston and bolts to rebuild it.

search archway mc salvage in st louis may be able to salvage piston-try getting a mc rebuild manual

Jan 11, 2010 | 2005 Jawa 350 Basic

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