Question about Lifan Motorcycles

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I have a 2005 Lifan Defiant 250cc motorcycle, and I'm having trouble getting it to run smoothly. I need the schematics for the fuel lines and vacuum lines to make sure they are hooked up properly.

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  • 125 Answers

Most likely is it carburetion or engine timming.

The bike is a knock off ....
Here is the actual service manual for the bike

http://nans.1gb.ru/motomanual/Yamaha/Yamaha%20XV250.pdf

Posted on Apr 10, 2015

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Posted on Jan 02, 2017

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  • 636 Answers

SOURCE: I need a free manual download for a super moto ATV

you could check Haynes manual, they have a wide variety of manuals

Posted on Sep 11, 2009

  • 5 Answers

SOURCE: What is the proper way

The '82 1/4" fuel line goes from the petcock to the carb....(install an in-line fuel filter between them)...with a vacuum line going from the petcock to the vacuum off take, located on the front carb rubber manifold, (the smaller of the two brass tubes!!).
You should also go to www.ridersofvision.net A web site for Yamaha Vision owners...

Tiger.

Posted on Oct 11, 2010

  • 5 Answers

SOURCE: Fuel Line Diagram Info Need information on how to

The '82 Yamaha Vision only has one fuel line coming from the carb to the petcock and a vacuum line running from the petcock to the front carb manifold. An in-line fuel filter between the carb and petcock is reccomended...

Please log on to www.ridersofvision.net a web site dedicated to the Vision...

Tiger.

Posted on Oct 11, 2010

ZJLimited
  • 17970 Answers

SOURCE: i have a lifan 250cc

I've found a Yamaha XV250 manual online (Yamaha-XV250-Shop-Manual). Doubtless there are others out there.

The good news is that most of it looks like it'll apply to the Lifan (without test yet). Other details could be interchanging and visit this Lifan Forum.

Good luck.

Posted on Sep 23, 2011

caroldon
  • 17130 Answers

SOURCE: tune_carby lifan

Hi, This is something that cannot be doen on a DIY as the experienced tuner would get this to work with precision and what is required of a twin carb. So my advice is to find the nearest specialist to get you bike in best optimum tuning.

Posted on Oct 30, 2011

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1 Answer

Hi i have a older bike it's a,2008 lifan 250b v twin I think. I can fire it up but it won't idle for long and quits


Hi, James and the usual suspects are:
1. Idle circuit and transfer ports clogged.
2. Air fuel mixture adjustment too lean.
3. Pilot jet clogged.
4. Faulty accelerator pump.
5. Float level too low.
6. Float bowl contaminated old fuel, water, dirt, rust, etc.
7. Float bowl vent or overflow tube clogged.
8. Fuel flow to carburetor restricted.
9. Intake manifold leak.
10. The gas cap is not venting properly or fuel tank venting system blocked.
11. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
12. Needle and seat stuck closed in the float bowl.
13. Multi carburetors not in sync.
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I have a 2009 cfmoto v5 250cc motorcycle


Hi, Deedee one of these will fix your bike 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 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 links below. Good luck and have a nice day.
http://www.alternativecruisers.com/index.php?action=printpage;topic=15348.0
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1 Answer

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Hi, Justin could be your carburetor and the usual suspects are:
1. Idle circuit and transfer ports clogged.
2. Air fuel mixture adjustment too lean.
3. Pilot jet clogged.
4. Faulty accelerator pump.
5. Float level too low.
6. Float bowl contaminated old fuel, water, dirt, rust, etc.
7. Float bowl vent or overflow tube clogged.
8. Fuel flow to carburetor restricted.
9. Intake manifold leak.
10. The gas cap is not venting properly or fuel tank venting system blocked.
11. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
12. Needle and seat stuck closed in the float bowl.
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Hi Anonymous, and the usual suspects are:
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3. Alternator not charging or below normal rates.
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5. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor.
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7. Water or dirt in fuel system, carburetor or filter.
8. Fuel tank vent system plugged or gas cap not venting.
9. Fuel tank empty.
10. Fuel valve vacuum line broken or carburator vent line closed off.
11. Restricted, blocked or kinked fuel line.
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Tune_carby lifan


Hi, This is something that cannot be doen on a DIY as the experienced tuner would get this to work with precision and what is required of a twin carb. So my advice is to find the nearest specialist to get you bike in best optimum tuning.

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