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My benelli m50 scooter start idle well. Lacks power at full throttle. Has Yamati engine in it. I've replaced spark plug cable, the fuel filter, cleaned the air filter any ideas please help

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  • Master
  • 2,432 Answers

Run son carb cleaner thru it. If that doesn't work you will need to remove and disassemble the carburator to clean it properly.

Posted on Aug 12, 2017

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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bozcro
  • 867 Answers

SOURCE: Engine revs when turning right.

being an older bike, maybe a wire from the hand controls is shorting out, even in side the handle grip switches, or going down the neck under the tank. normaly a throttle cable problem would cause the rpms to go up when turning the handle bar, thats why im suspecting a short

Posted on Jul 30, 2009

petersfan761
  • 92 Answers

SOURCE: engine stalls after acceleration

Sounds like its not "un-choking" it self, that its running like its still choked like you wold at initial start up.

Disassemble it and see if u can pysically see the activation and deactivation of the choke when u apply them.

While u are at it, also make sure:

Gas is fresh?

MIx is right?

Plug is good?

Chain brake mechanism is released.?

Good luck.

Posted on Oct 05, 2009

mickey813
  • 472 Answers

SOURCE: adjust throttle speed

YES YOU DO BUT YOU NEED A TOOL THAT ONLEY SHOPS HAVE LET ME KNOW IF I NEED TO TELL YA WERE TO TAKE IT

Posted on Oct 12, 2009

  • 3 Answers

SOURCE: echo shred n vac starts,idles, runs to about half power then bogs

Check the grommet that sits on top of tank where lines from go carb. Grommet may be rotten and crack. Try that. Have you ever replace the carb repair kit? The diaphram may be torn, defoam or have holes in them. Carb kit cost arount $10, but don't mess with the welch plug or screen in carb.

Posted on Feb 22, 2010

  • 198 Answers

SOURCE: Tiller dies when trying to run at mid to full throttle.

try checking the high speed jet for clog

Posted on May 10, 2010

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1 Answer

What is wrong when a Sym Evo 300i Scooter has no power. It stalls under full throttle and sometimes start jerking. if I switch it off and restart it runs normal for some time.


Hi, Jurie and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. 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.
3. Spark plugs in bad condition or partially fouled.
4. Spark plug cables in bad condition and leaking check for spark leakage in the dark
5. Spark plug gap too close or too wide.
6. Faulty ignition coil, module, and or sensor.
7. Loose, dirty, or corroded ignition module connector at crankcase.
8. Faulty CKP or CMP, MAP, ETS, ATS, TPS, O2 sensor.
9. Intake air leak.
10. Water, dirt, or rust in the fuel system, carburetor and/or filter.
11. Old dead or bad fuel.
12. Fuel tank vent system plugged or carburetor vent line closed off.
13. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
14. Carburetor controls misadjusted.
15. Damaged carburetor.
16. Incorrect valve timing.
17. Weak or broken valve springs.
18. Damaged intake or exhaust valve.
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 nice a day.
New Taotao ATM50 A1 Bogs Down Under Throttle Scooter Doc Forum
No power on full throttle main jet carburetor problem fixed
https://scootergrisen.dk/scooterhjemmeside/download/sym_gts_servicemanual.pdf

Oct 05, 2016 | Sym Motorcycles

1 Answer

Lacks power after 1/2 throttle also knock on motor after 1/2 throttle


it may all be in the carby settings
if you do not have it adjusted correctly then it may be running too lean at full throttle and that is causing a problem such as detonation causing the knock
start it and slowly adjust the settings as you increase the throttle settings

take it in to a service center for a proper diagnosis and quote

Sep 18, 2016 | Garden

1 Answer

Will not start


Hi, Jason 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. Discharged battery, 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.
8. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and module.
9. Spark plug cables in bad condition and shorting, cable connections loose, or connected to the wrong cylinders.
10. Ignition timing incorrect due to a faulty ignition coil, ignition module or sensors (MAP, CMP, CKP, O2 and/or BAS).
11. Security alarm needs a reset.
For more information about your issue, please visit the websites below. Good luck and have a nice day.
50CC Scooter Wont start
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Oct 20, 2013 | Benelli Motorcycles

1 Answer

My benelli velvet 250 is using to much fuel


Hi Anonymous and the usual suspects are:
1. Excessive enrichner use.
2. High-speed riding style.
3. Idle speed improperly adjusted.
4. Dirty air cleaner element (may also affect idle speed).
5. Vacuum piston assembly malfunction.
6. Excessive accelerator pump output.
7. Plugged or restricted bowl vent.
8. Fuel level too high.
9. Loose jets.
10. Worn or damaged needle or needle jet.
11. Enrichner valves not seated or leaking.
12. Plugged air jets or passages.
For more information about your issue please visit the websites below. Good luck and have a nice day.
Scooter Carburetor Idle Adjust
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Mar 04, 2013 | 2010 Benelli Velvet 250

1 Answer

Need help with my 88' celebrity 2.8L v6,


What is the fuel pressure reading now? Has the distributor ignition rotor ever been replaced? They burn through and cause all kinds of problems. Also this could be spark plug wires leaking or shorting out to the engine block. I would take a very close look at the ignition systems condition.

Jan 23, 2012 | 1988 Chevrolet Celebrity

1 Answer

Yamaha majesty 125 2004 won't start! The engine


Hi, Mlt1937 and the usual suspects are:
1. Fuel tank empty.
2. The fuel tank has old dead gas.
3. Fuel tank bottom contaminated with ethanol sludge, dirt, water, rust, etc.
4. Fuel supply valve/petcock turned off.
5. Fouled spark plugs.
6. Engine flooded as a result of overuse of the enrichner.
7. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
8. Fuel valve/petcock or filter clogged.
9. Fuel line to carburetor or throttle body pinched, kinked or blocked.
10. Carburetor float stuck.
11. Fuel injectors clogged.
12. A severely discharged or damaged battery, you need 12.5 volts or better and be able to pass a load test if necessary.
13. 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.
14. Loose or corroded wire connection at the coil or plug between ignition sensor and ECM module.
15. Spark plug cables in bad condition and shorting check for spark leakage in the dark, cable connections loose, or connected to the wrong cylinders.
16. Ignition timing incorrect due to a faulty ignition coil, ignition module or MAP, CMP, CKP, O2, TPS, ETP, IAC sensors.
17. Faulty neutral, clutch lever, or kickstand safety switch.
18. Faulty fuel pump or fuse or relay.
19. A stuck bent or burnt valve.
20. Tilt sensor needs a reset.
21. Security system not disarming alarm needs a reset.
22. 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.
Scooter Troubleshooting Scooter won start All about Scooters
The Ultimate GY6 Starter Ignition Troubleshooting Tutorial
Yamaha YP125 YP250 YP400 repair manual Download Manuals Technical $10 cheap
http://www.49ccscoot.com/manuals/Yamaha_Vino_125_Service_Manual.pdf Free
OEM parts for Yamaha
YAMAHA MAJESTY YP125E Owner Manual

Apr 23, 2017 | 2007 Yamaha Majesty 125

1 Answer

Need a service manual for Benelli Andretti M50 scooter


Hi Haroldjanet, I am sorry you can't find the first and best tool you ever bought for your Benelli but despair not for a mere $0 you can download another one. For more information about your issue, please visit the websites below. Good luck and have a nice day.
2009 Andretti Benelli M50 Scooters
New York Scooter Forum View topic Benelli Andretti M50
Benelli Andretti M50 Motor Scooter
http://absolutelyscooters.net/service-manuals.html
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Jun 08, 2011 | Benelli Honda Gizmo Motorcycles

1 Answer

Scooter starts but stalls after a few seconds. It has been stored for a few months.


Hi, Anonymous if your bike has been idle for months or years and does not want to start you will have to deal with a few remedies:
1. Drain and flush fuel tank, google " how to clean a motorcycle gas tank" find a couple forums to view the different options available.
2. Remove your air cleaner and clean and re-oil per Mfg. specifications.
3. Remove the carburetor, disassemble and decontaminate with a carb dip or if you have EFI remove injectors and clean with carb spray and compressed air
4. Remove fuel valve and filter disassemble and clean as necessary, remove fuel lines and replace with new ones.
5. Replace spark plug with a new one and check for spark.
For more information about your question please visit the website below. Good luck and have a nice day.2012 Tao Tao 50cc scooter BMW C1 scooter stall at idle after normal start FOUND IT
My chinese scooter wont idle or start Check the fuel petcock
http://www.benelli-scooters.de/pdf/BA_Benelli_Velvet125.pdf
Benelli Velvet 150 2014 service manual DOWNLOAD FREE FULLMANUALS COM


May 20, 2010 | 2008 Benelli Velvet 150

2 Answers

My mo ped stutters at high speeds


Take off Air filter, look inside the carb and pull throttle all the way, the circle should be fully open, if not it may not be getting the full amount of gas it could be, Clean the carb as well, take it apart and clean the mesh filter, To check your plug, just unscrew it from engine, put the cap on the plug, place the tip of the plug on something metal and pull start the engine to see if its sparking. I think you have a carb problem though, clean it and clean your filter and you should be good. If its a stock engine on a goped sport than you should mix 3.2 ounces of oil per gallon. Hope this helps

Apr 10, 2010 | Go Ped GSR Sport Gas Powered City Scooter

1 Answer

I can't kick start my moped now. Before I can kick start it and sometime the engine goes out when I stop at the traffic.


Hi, Casper_c_rea 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. Discharged battery, 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.
8. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and module.
9. Spark plug cables in bad condition and shorting, cable connections loose, or connected to the wrong cylinders.
10. Ignition timing incorrect due to a faulty ignition coil, ignition module or sensors (MAP, CMP, CKP, O2 and/or BAS).
11. Security alarm needs a reset.
For more information about your issue, please visit the websites below. Good luck and have a nice day.
Startup Troubleshooting Starting Your Scooter 1 7
How To Fix Scooter Starting Issues Part 1 Quick Guide
Fix Chinese 49cc Scooter that won start Benelli service manuals page 4
http://phano.xyz/yrt/b/benelli-owners-manual.pdf


Nov 24, 2009 | 2008 Benelli BX 570

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