Question about 2002 Yamaha YZ 426 F

1 Answer

Frothy oil Started my bike this morning, it started up fine but it was backfiring a lot  just warming it up so I shut it down. I checked the fluids, the coolant was fine but the oil is frothy & more froth & bubbles are raising up as it sits. Help please?!!!

Posted by on

  • danny
    danny May 23, 2009

    I dumped the oil isnt milky & seems to be pretty clean, the bubbles settle when left to sit

  • danny
    danny May 25, 2009

    It didn't smell unusual, it did have about 500ml too much oil in it could that do it? I took it for a good ride yesterday & it went ok, backfired a little when going downhill in fourth with no throttle 

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 17 Answers

If it has a white color to it I would say you have a water leak into your oil some where head or jug gasket.

Posted on May 23, 2009

  • travislg4 May 24, 2009

    It could be a normal thing for your bike or the other could be getting a little exaust gases in the oil you should contact the dealer and see if it is normal for your bike. It is a good thing that you are not getting a while milky color to it. Again with the back fireing you could need a new plug or you could have lost a ring and that is causing exaust to get into your oil did your oil smell funny at all?

  • travislg4 May 24, 2009

    It could be a normal thing for your bike or the other could be getting a little exaust gases in the oil you should contact the dealer and see if it is normal for your bike. It is a good thing that you are not getting a while milky color to it. Again with the back fireing you could need a new plug or you could have lost a ring and that is causing exaust to get into your oil did your oil smell funny at all?

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Backfiring and missing


change the spark plugs.

Jan 06, 2014 | Cars & Trucks

1 Answer

Back firing and missing


Carberator take the sedum ate bowl of a clean the jets and every thing else with carb and choke cleaner also check that the float isn't stuck

Jan 06, 2014 | Cars & Trucks

1 Answer

Oil pump


Generally speaking... Yes, that's normal. That's how it works.

The car is cold in the morning and the oil thicker. When the oil warms up it thins down some and flows better. When the flow improves the pressure comes down.

What you want to look for is changes. Did the car used to idle when warm at 30 and all of a sudden it's at 5psi? That would merit getting it checked out.

Sep 28, 2012 | 1999 Dodge Durango

1 Answer

Bike will start and warm up fine. After riding till its up to operating temp (running fine) no missing or other problems if you shut it down it wont start back up- it just pops and backfires. Only way it...


the igntion module on the right side of the motor is probably bad its a typical issue with sportsters, if you heat the area around the timer cover with a heat gun and then try to start the bike and it wont start then you know its the ignition module on the sensor plate.

May 14, 2010 | 1993 Harley Davidson XLH Sportster 883

1 Answer

Hi i have a wr400 99model and have just done an oil filter n oil change then i started my bike it all seemed fine until five minutes of the bike running the header pipe started to glow red i drained the...


All the wrf's,250 426 400 etc. WILL heat up and boil if they are left running without being ridden.They need air to be flowing over the radiator.1 minute can be enough to get them hot if the choke is used.You wrote that this happened after an oil change.Did you previously let the bike sit and run?.Check your air filter is clean as this can enrich the fuel/air ratio and create extra heat.Main thing is ,shut the bike down if you are stopping for more then a very short time.To satisfy yourself,take the bike for a slow ride as it is warming up.It can take up to 1 mile to get proper temp. into the entire motor.Hope this helps

Apr 24, 2010 | 2000 Yamaha WR 400 F

1 Answer

Bike backfires and misses.


Run some Seafoam through the carbs. Should be available locally at a parts store. Mix with your gas according to directions. This will clean out the carbs, which sound like they are a little gummed up.

May 29, 2009 | 2003 Honda VTX

1 Answer

Starting The Bike On A Cold Morning


Try putting in new, stock spark plugs. Check and possibly replace the air filter. Charge the battery. Get the bike running then check the battery voltage at 2000 rpm. It should show 14volts or more. If not, get the charging system checked. Get a can of starting spray (for future problems).

Get the compression checked. Your bike is 21 years old and I will bet that the valves are needing to be reseated. Check the valve clearances with a cold engine and reset valve clearances as needed. Check the area where the head contacts th cylinder. Any mist of an oil stain? Tighten the head or replace the head gasket. If replacing the gasket, now is the time to have the shop lap re-seat the valves. Have them sync and balance the carbs as well. Your bike will now have its' manners back and show you the dedication it should.

May 29, 2009 | 1988 Yamaha FZR 250

2 Answers

2006 Yamaha TTR 50E pouring oil out of air cleaner housing


With the oil problem I read on another site that Yamaha did that so that excess oil would be burned up in normal running (but this was usually smaller amounts). Anyways they disconnected the tube going to the air cleaner and had tied up in such a way that any excess oil would land on the chain thus lubricating it. But if you have that much oil coming out it could be that you have put in too much.

Apr 21, 2009 | 2005 Yamaha TT-R 125 E

1 Answer

Backfiring and seems to be struggling getting fuel


check to make sure your plugs arent fouled. the last bike i had did that to me, fine in the morning and when i went to leave for work in the afternoon the bike ran like **** for a few seconds and shut off. i took the bike back to where i bought it and they replaced the plugs. ran fine after that.

Feb 16, 2009 | 2003 Yamaha XJ 900 S Diversion

Not finding what you are looking for?
2002 Yamaha YZ 426 F Logo

Related Topics:

212 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

dhnguyen

Level 2 Expert

281 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1144 Answers

Tony

Level 3 Expert

2600 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...