Question about 2001 Yamaha YZ 426 F

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My wr 25094 model 2 stroke keeps blowing coolant out the overflow

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WR F are 4 stroke.YZ are the 2 stroke models.If it is a wr,and you let them idle for more than about 1 minute,they all blow out coolant.They need to be moving to keep things cool.Hope this helps

Posted on Oct 15, 2010

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Posted on Jan 02, 2017

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Hi should my 2014 450 sxf blow a black ish kind of smoke when revved an on down rev a bluey black smoke think its called blow by? And what should I do to fix it? Could it just be a spark plug? Thanks


is yours the 2 stroke model or 4 stroke model ? 2 stroke model they do burn oil so it would be blue/black smoke, 4 stroke should be gray/blue color, if 4 stroke model it could be the timing is out a bit or the spark plug is not set right. or weak dispak. it can also be the fuel to air mix is out of alignment.

Jan 29, 2017 | Cars & Trucks

1 Answer

Spitting gas out overflow from crankcase


What model and year? Because if it is a 4 stroke you have serious problems. If it is a 2 stroke then depending on how much will indicate something of the problem. 2 strokes use the crankcase to pressurise the mixture before feeding it to the combustion chamber. 4 strokes should never have fuel in the crankcase. It would indicate a hole in the piston or failed piston rings.

May 13, 2013 | Husqvarna Motorcycles

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Overheating


OVERHEATING CAN BE CAUSE BY MANY THINGS LIKE FAULTY THERMOSTAT AND FAULTY RADIATOR PRESSURE CAP,TOO MUCH WATER IN COOLANT SYSTEM NEED 50 / 50 WATER AND ANTIFREEZE.LOOK FOR WATER PUMP WEEP HOLE LEAK, IF COOLANT LEAKING OUT WEEP HOLE WATER PUMP BAD NEED REPLACING.CHECK FOR LOW COOLANT LEVEL, YOUR RADIATOR OVERFLOW JUG SHOULD HAVE COOLANT AT THE FULL COLD MARK IF NOT KEEP ADDING COOLANT INTO COOLANT OVERFLOW JUG UNTIL COOLANT STOP DROPPING AND FULL COLD MARK, IF OVERFLOW COOLANT JUG WAS EMPTY RADIATOR IS LOW ON COOLANT.WHICH CAUSE AIR IN COOLANT SYSTEM KEEPING THE ENGINE COOLANT TEMPERATURE SENSOR FROM BEING SUBMERGE IN HOT COOLANT WHICH TURN ON THE COOLANT FANS.WHEN ENGINE COOLANT TEMPERATURE GET CERTAIN SET TEMPERATURE LIKE 190 DEGREES THE PCM AND COOLANT SENSOR WILL TURN ON COOLANT FANS, IF VECHICLE OVERHEATING COOLANT FANS NOT WORKING EITHER YOU HAVE FAULTY ENGINE COOLANT TEMPERATURE SENSOR CHECK COOLANT FANS FUSE AND RELAYS. YOU CAN CODE SCAN CAR TO SEE IF YOU HAVE FAULTY PCM, FAULTY ENGINE COOLANT TEMPERATURE SENSOR OR FAULTY COOLANT FAN RELAY.IF COOLANT FAN AND ENGINE COOLANT TEMPERATURE SENSOR OKAY,YOU HAVE CORRECT COOLANT LEVEL IN COOLANT SYSTEM, THERMOSTAT AND RADIATOR PRESSURE CAP BEEN REPLACED, YOU COULD HAVE BLOWN HEAD GASKET CHECK ENGINE OIL LOOKS LIKE MILK SHAKE HEAD GASKET BLOWED ALSO WHEN HEAD GASKET BLOWED YOU CAN DRIVE CAR SHORT DISTANCE START OVERHEATING AND YOU LOOSE ENGINE POWER SUSPECT BLOWED HEAD GASKET.

Aug 04, 2011 | 1999 Oldsmobile Alero

1 Answer

Need to know if i need to bleed the cooling system, after installing the radiator?


ADD COOLANT IN THE COOLANT OVERFLOW JUG UNTIL COOLANT LEVEL STOP DROPPING AND COOLANT LEVEL STAY AT THE FULL COLD MARK.PLACE COOLANT OVERFLOW JUG CAP BACK ON JUG.CRANK VECHICLE UNTIL ENGINE START WARMING UP. STOP ENGINE WAIT FOR A WHILE UNTIL COOLANT COOL DOWN TO KEEP FROM GETTING SCALDED. USE A LARGE RAG OVER THE OVERFLOW JUG CAP OPEN OVERFLOW JUG CAP A LITTLE AT A TIME REMOVE OVERJUG CAP CHECK COOLANT LEVEL ADD MORE. COOLANT IN THE OVERFLOW JUG.THEN START VECHICLE AGAIN.LET ENGINE IDLE UNTIL TOP RADIATOR GET HOT.THEN THERMOSTAT WILL BE OPEN.WHILE ENGINE IDLING WATCH THE TEMPERATURE GAUGE IN VECHICLE IF TEMPERATURE GAUGE START CLIMBING IN THE HOT ZONE.TURN OFF VECHICLE LET IT SET A WHILE THEN USE LARGE RAG REMOVE OVERFLOW JUG CAP.ADD MORE COOLANT, PLACE CAP BACK ON START VECHICLE AGAIN KEEP DOING THIS PROCEDURE UNTIL TEMPERATURE STOP CLIMBING HOT ZONE.AND WHEN COOLANT LEVEL STOP DROPPING IN THE COOLANT OVERFLOW JUG.AIR IS OUT THE SYSTEM, BUT KEEP COOLANT LEVEL IN THE COOLANT OVERFLOW JUG AT THE FULL COLD MARK.DONT OVERFILL.DONT LET COOLANT OVERFLOW JUG RUN DRY IF SO AIR WILL ENTER COOLANT SYSTEM BECAUSE COOLANT LEVEL WILL BE LOW ENGINE WILL START OVERHEATING.

Jul 24, 2011 | 2006 Dodge Grand Caravan

1 Answer

My car keeps overheating ive changed the water pump, thermastat and radiator. the only place that water leeks from is the resuoivor what else could it be and how can i tell?


you need to find a garage that has a coolant gas tester. this measures presence of combustion gases which have bled into the cooling system, meaning a bad gasket or crack. when the combustion bleeds into the cooling system, it creates pressure which blows the coolant out the overflow.

after you look in that area, check for sweet smell, green or orange tinged white smoke at the exhaust could tell you that the coolant is going into the combustion chamber. when it leaks one way, it often leaks the other way as well when the piston is on the intake stroke.

Mar 21, 2011 | Chrysler LHS Cars & Trucks

1 Answer

Need help on the letter


WR stands for wide range if I remember in 1989 there was the YZ250 and the WR250 both two strokes.
The WR was the enduro model with a wide range gear box. low first gear and overdrive in top
The WR four strokes started around 1998, but Im not sure if the gearbox are much different to the YZF.
In australia there is a compliance plate on the headstem with model ID.

Jun 13, 2010 | 2001 Yamaha WR 426 F

1 Answer

What engine oil do i use


Depending if your bike is 2 stroke of 4 stroke Will depend on oil i assume its 2 stroke

May 14, 2010 | 2007 Husqvarna WR 250

1 Answer

Fuse#28 (5A, air-conditioner, blower, heater) keeps blowing on my 2001 BMW 325i. It kills the whole A/C, heater, blower console. I replaced my fuse twice but it's blown again after a few days. These...


maybe you have caused a short somewhere when replacing the overflow bottle... what i would do is run a 5 amp higher fuse NO MORE THEN 5 and if this blows then you have a bigger problem

Mar 19, 2010 | 2001 BMW 325

1 Answer

2003 WR250 F - eng. won't idle down and carb starts to overflow


Hi Jwelden,
Have you checked the float level in the float chamber?
I guess you may have to reset the float pin adjustment, its allowing more gas to pass through thn required and thus the overflow!
Not bad too, when you are working on the float assembly take the opportunity to blow out the fuel line from petcock to the carburator via the seat for the float pin,any foreign particals there would stop the float pin to seal up and thus overflow.
Fit in an inline fuel filter , this will help keep out the dirt or whatever.
Hope this helps.

Knight (Yamaha Seca XJ750A 1981)


Feb 13, 2009 | 2003 Yamaha WR 250 F

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