[JinYiWei]

Yamaha
wr400
1999

Used bike bought at low price because it dont start no more.
I tried to fix it myself for the next summer.

Carburettor has been checked by a garagist.
Decompression cable has been change.
I checked the fire and it's ok but I still have to check the gap to be sure it match the spec (0.6mm)
And as i was checking fire i saw gaz splashing from sparkplug hole

Someone told me i should check the stator.
But i would like to have double advice about what should be done next in the "wont start" troubleshooting process.

When i kickstart it, i checked for the stop button to be disactivated, i pulled the choke, crank the kickstarter until i met good restriction and kick it, again and again.

 

[SemiFast]

And as i was checking fire i saw gaz splashing from sparkplug hole

That means the carburetor is flooding over.
You have a dirty or worn float valve or the float is sinking causing fuel to flood out of the carburetor. Gasoline may have (probably has) flooded past the piston rings and down into the engine crankcase. Be sure to check the engine oil for fuel or just change the oil and filter, after a carb clean/repair.

S F

 

[JinYiWei]

That means the carburetor is flooding over.
You have a dirty or worn float valve or the float is sinking causing fuel to flood out of the carburetor. Gasoline may have (probably has) flooded past the piston rings and down into the engine crankcase. Be sure to check the engine oil for fuel or just change the oil and filter, after a carb clean/repair.

S F

Thank you SemiFast, i will go ahead and buy new carb, oil filter and oil and i will post further advancement.

 

[SemiFast]

Many times, or a lot of the time you can just fix the carburetor you have instead of spending the $$$ new will cost.


S F

 

[JinYiWei]

Many times, or a lot of the time you can just fix the carburetor you have instead of spending the $$$ new will cost.


S F

Yes i just called a retailer and the guy said the exact thing.
Thanks again SemiFast

 

[DannoXYZ]

Send your carburetors to this outfit for repair and restoration. Expert workmanship, reasonable fees and fast turnaround. Bike will run like brand-new!!!

customcarbservices.com, Professional motorcycle carb cleaning

Proc carb service utilizing modern technology in a shop setting. Featuring truly affordable, fast turnaround to deliver comprehensive service to your carbs. While in my possession, they are treated as I would my own!

customcarbservices.com

 

[JinYiWei]

Send your carburetors to this outfit for repair and restoration. Expert workmanship, reasonable fees and fast turnaround. Bike will run like brand-new!!!

customcarbservices.com, Professional motorcycle carb cleaning

Proc carb service utilizing modern technology in a shop setting. Featuring truly affordable, fast turnaround to deliver comprehensive service to your carbs. While in my possession, they are treated as I would my own!

customcarbservices.com

Yess already enjoy summer for riding it

 

[JinYiWei]

So it seems the, i don't know the exact word in english but i think it should be the float?
The float is damage/broken and it's no more on the market, BUT i found one carburetor on amazon it says it fit wr400F 1998-2000, my next question is what "F" stand for ?

 

[DannoXYZ]

WR400F is full name of that model.

https://en.wikipedia.org/wiki/Yamaha_WR450F#First_generation:_WR400F_-_1998-2000

Can usually get them used.

Yamaha YZ 400F WR 400F Carb Float Level Bobber 5BE-14985-00-00 1998-1999 | eBay

Item: Float. Do you allow local pickup at your location?. What is I need my order more quickly?. When can I expect my order to arrive?. What happens after I have paid for my item?.

www.ebay.com

Or as part of rebuild kit:

Carburetor Float Valve Pin Needle Seat Set For Yamaha WR400F | eBay

Carburetor Float Valve Needle Set For Yamaha WR400F 1998-2000.

www.ebay.com

Set Carburetor Carb Float Bowl Repair Rebuild Kit Fit Yamaha 1998-1999 WR400F | eBay

1x Carburetor Rebuild Kit as pictured. We will provide you the best products and service. Local pick-up is unavailable.

www.ebay.com

Set Carburetor Carb Float Bowl Repair Rebuild Kit Fit Yamaha 1998-1999 WR400F | eBay

For Yamaha WR400F Carburetor Carb Rebuild Repair Kits 1998-1999. For Yamaha 1998-1999 WR400F. You can use it to fix the carburetor of your motorcycle, it is more cheap and convenient than you replace a new one.

www.ebay.com

 

[JinYiWei]

WR400F is full name of that model.

https://en.wikipedia.org/wiki/Yamaha_WR450F#First_generation:_WR400F_-_1998-2000

Can usually get them used.

Yamaha YZ 400F WR 400F Carb Float Level Bobber 5BE-14985-00-00 1998-1999 | eBay

Item: Float. Do you allow local pickup at your location?. What is I need my order more quickly?. When can I expect my order to arrive?. What happens after I have paid for my item?.

www.ebay.com

Or as part of rebuild kit:

Carburetor Float Valve Pin Needle Seat Set For Yamaha WR400F | eBay

Carburetor Float Valve Needle Set For Yamaha WR400F 1998-2000.

www.ebay.com

Set Carburetor Carb Float Bowl Repair Rebuild Kit Fit Yamaha 1998-1999 WR400F | eBay

1x Carburetor Rebuild Kit as pictured. We will provide you the best products and service. Local pick-up is unavailable.

www.ebay.com

Set Carburetor Carb Float Bowl Repair Rebuild Kit Fit Yamaha 1998-1999 WR400F | eBay

For Yamaha WR400F Carburetor Carb Rebuild Repair Kits 1998-1999. For Yamaha 1998-1999 WR400F. You can use it to fix the carburetor of your motorcycle, it is more cheap and convenient than you replace a new one.

www.ebay.com

Oh! Thank you !
I thought It was done of this one..