Zongshen AS 250 - Answered Questions & Fixed Issues

Oil seal on the crankshaft has failed. Replace the oil seal.

What is the question?

manualslib.com

No, not with out some major fabricating.

You can buy this http://www.haynes.com/autorepairmanuals/zongshen/zs125gy-a Haynes Zongshen ZS125GY Repair Manuals and/or check the local library for one and also, contact Zongshen via email: [email protected] I just did for you in fact. http://en.zongshenmotor.com/?q=node/524 you can also join and post ina forum or some user group like:

Go online for the nearest dealer and see what he's got. These are cheap imports with very little support so you could have trouble.

if you have the gasket set just match up the gaskets you take off if your set has one too many it could be for different model but same engine with higher or lower performance.

Alot of times if you look and the base of the cylinder there will be a Cm #. That number is the cc's of the bike. for example if it says cm250. Then it's a 250. and so forth. I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_5bac37c3cb991fdb

bad earth connection on engine to frame

Okay??.....and.....???

Please check on the timing. It is possible that the timing is off of sync and so this results in backfiring . Mostly it can be advanced and the firing takes place when the throttle is cut . Also check if there is fuel overflow as it can result in pile up in the exhaust and cause this firing.

Check your wiring , there must be some wire drainig all the juice from the batteries.
Good luck

Hi,
That's right! you have to try another brand with similar cable, the difference is the length of the cable and the end notch.
Try and try until you succeed.
Thanks for asking FixYa!

set the gap at 20 thousants it should run perfect....

The battery is under the seat and seat has to be removed.On the side of the seat in the inner side there are hidden bolts.that are to be removed , to loosed the seat. ---------- Click this link below to get more details:--- http://howtobyme.blogspot.com/2011/07/how-to-remove-seat-on-2006-zongshen.html ------------- This should help.Thanks.Helpmech.

if you have replaced all that it sounds like it is the stator. its an alternator for small engines. get one on ebay cause factory are always expensive. its located behind the pull start. take that off then the side case cover.

Hi, I hate to say this. Go buy a new switch. It will be harder to rewire than to replace the switch.
Good luck. They're not too expensive.

not sure what it is that you need help with please tell me more and i'll be happy to help
M.Woodring

Some common causes and potential solutions: Air/Vacuum Leak: If your Harley develops a vacuum leak in its air intake system, the air-fuel mixture becomes too rich. This can cause frequent stall outs, especially after the bike warms up. Vacuum leaks often occur due to dried-out or cracked air intake boots, faulty gaskets, or worn-out carburetor seals. When air escapes from the intake system, the fuel fills the empty space in the combustion chamber, altering the air/fuel ratio and negatively impacting combustion. Severe vacuum leaks can lead to excess fuel flowing into the exhaust system, causing backfiring and stalling while riding. Clogged Fuel Tank Filter/Fuel Injectors: A blocked fuel tank filter (due to coagulated fuel, moisture, dirt, or corrosion) impairs fuel flow, resulting in a lean air/fuel ratio. On fuel-injected Harleys, clogged fuel injectors produce similar symptoms. Regular maintenance, including cleaning and inspecting fuel filters, helps prevent these issues. Faulty Cam Chain Tensioner: A malfunctioning cam chain tensioner can affect engine timing and cause stalling. Regular checks and replacements are essential to avoid this problem. Faulty Cam Position Sensor: The cam position sensor plays a crucial role in ignition timing. If it malfunctions, it can lead to stalling and backfiring. Clogged Air Cleaner: A dirty air cleaner restricts airflow, affecting combustion efficiency. Regularly clean or replace the air filter to prevent this issue. Ignition System Failure: Faulty ignition components (such as spark plugs, ignition coils, or wires) can cause misfires, backfires, and stalling. Inspect and maintain these parts regularly. Compromised Battery Terminal Connection: Poor battery connections can disrupt electrical flow, affecting the ignition system. Ensure clean and secure battery terminals. Remember that diagnosing and addressing these issues may require professional assistance. Regular maintenance and timely repairs can keep your Fat Boy running smoothly on the road.

Honda C90, or Suzuki C90? all questions need full 'year make model'. Google it plus 'engine number location'. ..