Question about 1985 Yamaha FZ 750 FT (U.S.)

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1986 yamaha fz400 wont start

Ive been offered a yamaha fz400 that has not been used or even started for 2 years . it will not start now the there is a new battery on the bike so the engine turns over but will not fire . any ideas would be a great help.

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You need fresh gasoline in it, if it's been idle for two(2) years, you also have to clean everything that your gasoline touches like the tank, fuel filter, fuel line, carburator, before pouring it in. If that wont help you, Have your CDI tested if your plugs wont spark. Also ask for the history of your bike, if it was running before they stopped using it.

Posted on Nov 22, 2008

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Posted on Jan 02, 2017

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Wont start after sitting a few months


Hi, Neal if your bike has been sitting idle for months or years and you did not do any pre-storage maintenance I feel your pain it will probably have a dead battery and not want to start or if it starts it will idle and run poorly then stall, here are the following steps necessary to complete in order to get your bike back to an acceptable running condition.
1. If your battery was 2-3 years old when you last had the bike running you should replace it.
2. If you believe your battery might still be serviceable remove it from the bike and put it on a 1 or 2 amp trickle charger for 24 hours. If it is the old lead acid type with visible cells and acid levels fill each cell to the top line with distilled water and replace the caps, run the vent tube into a plastic or styrofoam cup, any cells that are cloudy/milky replace the battery.
3. After charging remove the leads and let the battery sit for a couple of hours then check the battery voltage with a volt meter, you should have 12.5 volts or better, any readings in the 11 volt range you need to do a proper load test on the battery and replace as necessary, any readings in the 10 volt range you have a dead cell and the battery needs to be replaced.
4. Drain and flush fuel tank, google " how to clean a motorcycle gas tank" find a couple forums to view the different options available.
5. Remove and inspect your air cleaner paper elements that are not oil soaked can be cleaned with a soft brush and low pressure compressed air, oil soaked elements must be replaced. Gause mesh and foam elements can be cleaned by soaking them in a container big enough to completely cover them with a solution of 1 gallon of water and 1 oz. of Dawn dishwashing liquid for small and medium size elements, for monster size double the formula and let soak for at least one hour then rinse with warm water shake off excess and let air dry, "WARNING" do not use compressed air as this will embed micro-sized dirt and road grime and destroy the mesh pattern and stretch foam elements out of shape just squeeze it like a sponge and let air dry, use a fan if you're in a hurry. When completely dry spray a very fine mist of air filter oil evenly around the whole element.
6. Remove the carburetors, disassemble and decontaminate with a carb dip or if you have EFI remove injectors and clean with carb spray and compressed air
7. Remove fuel valve and filter disassemble and clean as necessary, remove, clean, and inspect fuel and vacuum lines and replace as necessary.
8. Replace spark plugs with new ones and check for spark.
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.
250F won start after sitting 5 months WR YZ 250F
YZ250f won start WTF
YAMAHA YZ250 LC Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Feb 15, 2014 | 2004 Yamaha YZ 250 F

1 Answer

08 yz250f wont start after sitting up


turn gas on under tank ,get new spark plug, gas mite be bad.

Feb 15, 2014 | 2004 Yamaha YZ 250 F

1 Answer

I have a 1986 Yamaha yz490. it ran great until it sat for two years when i went to start it it felt like it wanted to start. I replaced the spark plug and replaced the fuel filter. when i kicked it over i...


Your cylinder is probably full of fuel, becareful here. Disable the spark and kick it over with the spark plug out to remove the fuel.
Your problem sounds like a stuck float in the carburator. It needs to be removed and cleaned out good.

Jul 16, 2011 | Yamaha Fuoco Centenario Motorcycles

1 Answer

1986 yamaha 350 xt wont start. new spark plug varified spark and gas. why wont it start?


make sure its getting fuel then check to see how much compression it has it might have a tight valve

Jun 11, 2011 | Yamaha Vino 125 Motorcycles

1 Answer

Good day Haven't started my bike for 2 years i have put in a new battery dash lights up clock etc but won't turnover could you help. X MAX 125


this problem could be caused by a number of things and all may need att the starter button may be corroded inside and not making contact. the starter solinoid may be the same and the starer also may be coroded my 750sat for 2yeaers and these are the parts i had to repair or replace before it would wind over. it was working fine when i parked it im guessing your bike. doesnt have a kick start try push start if it starts then look at the things ive listed

Apr 25, 2011 | Yamaha XT 125 X Motorcycles

1 Answer

Doesn't start up , and oil light is on my 1986 yamaha fz600


The oil light wont go off until there is oil pressure ie: it has to start first.

" Doesnt start up" is not really enough info to offer any ideas,
it has an oil light so the battery has some voltage.
Does the starter motor turn it over?
What happened when it stopped?
When did it last run?
Has it sat unused for a long time?
Will it roll start?
When was it last serviced?

Apr 18, 2011 | 1988 Yamaha FZ 600

1 Answer

Bike dont start. Yamaha 175 CT - 1973 make.


Firstlly have you a spark at the plug.if you have no spark then it may be your points or even the timing may be out .

Mar 10, 2010 | 2004 Sym Husky 125

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