Question about RTO Honda Crf450 R Motorcycle Dirt Bike Metal Model Kit

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I have a1990 honda xr80 dirt bike its 3 hose on the carburetor none of them are hooked up i dont no where they go could you help me hook them up the right way

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Line from gas tank goes to brass nipple, throttle line goes to top threaded opening, the hole with two bolts alongside it go into the crsnkcase. air line from airbox clamps to the last opening on the carb. The of the openings are vents and overflow.

Posted on May 19, 2011

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When i got my bike back frm a friend one of the hose frm the carburetor was not hook to anything dont know wear it goes


Which gas line is it? there is one that is a vent and just dangles down and under the bike.

Nov 02, 2010 | Hyosung GT 250 Motorcycles

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My 95 xr600r dirt bike leaks oil


This hose should be connected to the air filter box.

It's for ventilation of the crankcase, much like the PCV (Positive Crankcase Ventilation) in cars. As the bike runs, the crankcase gets hot enough to vaporize some of the oil. And since there's always at least a little bit of combustion blowby in the cylinders, you get a bit of fuel/air thrown into the mix and an oil/fuel/air "atmosphere" in the crankcase, which isn't an ideal situation. So, when the hose is connected to the air filter box, it slightly vacuums off this atmosphere, letting the engine burn it and expel it through the exhaust.

If it's not connected to the airbox, the vapors can condense back to oil and just drip out.

If a lot of oil is coming out ("a lot" is hard to quantify), you could be getting excessive blowby because of a broken ring or cracked piston.

Hook that breather line back up to the airbox and unless the bike smokes excessively, I wouldn't worry about it.

If it IS hooked up, it or the airbox is cracked and needs fixing/replacing. If the breather line has somehow become plugged (mud-daubers are amazing at finding holes to makes homes out of), the pressure buildup could have split your vent line.

May 11, 2010 | 1995 Honda XR 600 R

2 Answers

I have a honda 1985 xr80 and i need help please answer


start by checking for fuel, and spark, if they are good, then turn the idle screw all the way in, slowley and dont force it, once you got it in all the way then turn it out 3 full turns, as this is a good rule for the idle on first start after a rebuild. if thats not working then check the engine for good compression, you'll need to contact the dealer and ask for a cyl compression spec. If thats the problem the engine will not start no matter how much you tweak it, it will have to be rebuilt. good luck

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Jul 01, 2009 | 2002 Honda XR 200

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I have two loose hoses coming off my petcock? where do they go


On your silverwing you have a "vacuum operated petcock" which means that the carbs draw a vacuum and allow the fuel to flow from the petcock. The front hose is the vacuum hose that should run to the center of the carbs. The second is a drain hose - it's advised that you do have a small hose connect here, so that dirt does not find its way into the petcock. This hose will simply run down past the swing arm to the ground. This would prevent any gas from dumping itself onto the engine if your petcock fails. If your bike runs without the vacuum hose attached, your petcock has failed and will need to be rebuilt.

May 09, 2009 | Honda Silverwing 400 Motorcycles

1 Answer

How to set timming on a 2003 Honda XR80 dirt bike?


This is the closest manual to your bike I can find.
http://www.autorepairmanuals.biz/site/57...
As you can see, it covers from 1979 - 2003 - Honda rarely change their engine configurations when they make something that works.
This manual was probably last printed in 2003 - and later year bikes just added updated pages (Honda does that quite often to save on re-printing new manuals).
The XL model is exactly the same as the XR, except the XL has additional components to make it street legal - battery, head light, tail light, turn signals, horn and street legal tires

Mar 20, 2009 | 2003 Honda XR 125 L

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