Question about 2004 Yamaha WR 250 F

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Exhaust My bike keeps filling the exhaust up with fuel and also holds back at about 60mph. Can some one help?

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Sounds like your not firing on all cylinders . If you are getting gas in the exhaust then the cylinder would not be firing for some reason. That would also cause top speed to be limited.

Posted on Nov 10, 2008

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Any thoughts on 2006 Virago 250 with gas leaking out of right exhaust pipe?


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Hello i have a aprillia sr50 and i brought it from brand new i ran the bike in for 300 miles and then i fully de-restricted the bike and placed a de-restricted exhaust on and a bigger jet and had the...


Hi,
That looks like a REED VALVE leak.
If your 2 stroke kept coming out from the carb air intake and as you say that sometimes a back fire in the exhaust.

Check these....
  • Reed valve
  • Crank oil seal ( there might be air leak in the block )
  • Exhaust pipe ( might be already blocked )

Hope that helps you out!

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1 Answer

Plugs-keep-fouling-tried-3-different-plugs-what-can-i-do-to-solve-this-problem


What is causing the fouling? Engine oil? On a two cycle dirt bike, the fouling can be caused by excessive oil in fuel mix. I believe 50 to 1 is the correct ratio yet you may want to cut back, a little at a time, on the oil or run hotter fuel. The exhaust system will also accumulate enough oil sludge to impede the exhaust flow causing poor performance and plug fouling. A two cycle must breath freely to keep itself internally clean. Air cleaner to exhaust. Proper fuel mix should have little , very little. Good Luckand hopefully this helps you.

Dec 27, 2010 | 2003 Yamaha YZ 125

1 Answer

Hello, Two of my friends have E-Glides with stock pipes, both have a stumble at the 50-60mph range. Do I need to put a bolt in the end of the main exhaust pipe to get rid of that stumble? Thanks, Ole...


If the stock mufflers are on the bikes, you should have enough backpressure to eliminate the stumble. That's what the bolt does, produce just a bit of back pressure on the exhaust system. Now, if the mufflers have been gutted, the bolts may help. It doesn't cost that much, try it.

Good Luck
Steve

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2 Answers

Just changed pipes and bike is back fireing


you need to remove your pair valve ,there is a guy called moccosin mike that sales them for i think 21 bucks,the pair valve is deff. whats causing the back fire

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1 Answer

Our Moto Guzi Nevada is surging all the time and has been back to a dealer several times and they cant find out what it wrong with it. · Inspect for running rough etc + put on axone scan tool + test...


I am not a Moto Guzi mechanic but in the world of Japanese bikes the problem would be trash in the carb partially blocking the main jet and / or internal fuel circuits. Tighten all fittings, carb to manifold as air leaks could be contributing to the problem. If your bike has fuel injection, have the fuel pump checked. Be sure the gas tank venting is not plugged whether carb or injection. Check and clean the filter screens on the pickup tubes inside the gas tank. Be certain the exhaust pipes are clear of obstructions. An internal collapse inside an exhaust pipe can restrict air flow. The bike can not run properly if it can't get rid of burned gasses. Remove the exhaust pipes briefly to eliminate the exhaust system as a problem. I guess I should mention the obvious, how clean is the air filter? Bikes gotta breathe in and out too. If these ideas don't help, just re-post the problem and perhaps someone else has an idea. Best wishes.

Jan 16, 2010 | 2008 Moto Guzzi Nevada Classic 750

1 Answer

MY 2005 WARRIOR 1700CC STREET BIKE WILL START FINE AND WHEN WARMED UP I JUMP ON IT AND IT WILL START CUTTING OUT, AND AT TIMES IT FINDS A LITTLE BIT OF AIR OR FUEL AND THE FRONT WHEEL POP'S UP. THIS IS A...


Hey Doug,
I would first suspect a clogged fuel filter, then ignition components and air pathway obstructions from filter to exhaust.
Sounds like the bike wants to run and does run...when it gets what it needs.
If it has a carb, check the float bowl for crud that can clog the jets. You may need to replace fuel line, but not likely.

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2 Answers

I Have a 2005 rmz 450 and the front pipe on the exhaust glows red hot really quickly


thats very very strange seems like your not getting the coolant there is ther coolant in the system and is there enough oil in the bottom also check oil filter replace if necessary get back to me

Sep 22, 2009 | 2005 Suzuki RM-Z 450

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My 01 F250 superduty 7.3L will not go faster than 60MPH. what would cause this?


a number of things,1. fuel restriction, (blocked lines filter etc).2. exhaust restriction, ( catalytic convertor blocked) 3, binding brakes, 4. slipping transmission, 5.contaminated fuel, 6. restricted air filter 7.fuel system fault,( pump,injectors,ecm, egr valve.)

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