Question about 1987 Yamaha YX 600 Radian

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Radian revs really high and shoots gas out of airbox

I start up the radian and it revs really high and after like 10 seconds starts shooting gas with a little bit of oil mixed w/it out of the air box.

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Manifold leaking. check carb to head gaskets and any vacuum lines that it has

Posted on Oct 03, 2009

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Yamaha radian overheating


Hi, Anonymous and the usual suspects are:
1. Engine oil level and SAE weight are too low or not circulating.
2. Insufficient or blocked air flow over the engine.
3. Heavy combustion chamber carbon deposits.
4. Ignition timing retarded due to faulty MAP, CKP, or CMP sensor.
5. Carburetor jetted too lean.
6. Leaking intake or exhaust valve.
7. Water coolant old or low change every two years.
8. Water pump failure.
9. Radiator clogged, cap loose or malfunctioning.
10. Radiator fans not coming on.
11. Clutch slipping, brakes dragging, heavy load, towing a trailer etc.
12. Idling too long without moving.
13. For constant hot weather temperatures, mountain, or desert riding conditions consider adding an oil cooler and or cylinder head cooler.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
yamaha radian starting running problems when warm
http://www.ringcar.com/15_4dddb4095a8f2e12_1.htm
Yamaha YX600 Service Manual
OEM parts for Yamaha
http://www.badrad600.com/Radian%20Manuals%20-%20Complete%20-%20Printable/Radian%20Owner's%20Manual%20Clean%20Complete%20Final.pdf

May 26, 2014 | Yamaha YX 600 Radian Motorcycles

1 Answer

1989 mustang gt starts revs really high then dies


Sounds like the idle control valve. The same thing happened to my Mustang and that was my problem.

1_15_2013_4_59_36_pm.jpg

Jan 15, 2013 | 1989 Ford Mustang

1 Answer

Dont start


Trouble shoot it by removing the airbox cover and air filter; squirt a shot of carb cleaner down the throat of the carb, with the choke open and everything in the run position try and start.
If it tries to start or starts and runs for a second that rules out an ignition problem and points toward a fuel issue.

Oct 25, 2012 | Poulan Pro 25CC 2Cycle Gas Blower

1 Answer

Yamaha rhino 660, starting


First u need to trouble shoot to find the source.check to see if it has spark,gas and air. And copression ....a engine works like this , suck pop blow....

Aug 11, 2012 | Yamaha Rhino 660 450 Intake Filter Airbox...

2 Answers

Radian idles high at 4 g then drops down to 21/2 g then dies


Hi, Daniel and the usual suspects are:
1. Throttle cables improperly adjusted, pinched or need lubrication.
2. Idle adjusting screw needs to be backed off.
4. Air fuel mixture adjusted too lean start with 2 full turns.
5. Intake system air leak.
6. Fast idle choke ramp is not releasing.
7. Broken throttle return spring.
8. Damaged diaphragm or slide.
9. Faulty MAP, TPS, ATS, O2, sensors or wiring/connector
10. Multi carburetors not in sync.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links blue below. Good luck and have a wonderful day.
Yamaha 1986 YX600 Radian High Idle
1986 Radian SUPER high idle
Yamaha YX600 Service Manual
OEM parts for Yamaha
http://www.badrad600.com/Radian%20Manuals%20-%20Complete%20-%20Printable/Radian%20Owner's%20Manual%20Clean%20Complete%20Final.pdf

Jun 14, 2012 | 1990 Yamaha YX 600 Radian

1 Answer

I am leaking oil out of a little black box what is it called ?


I am guessing you mean the little black box that holds the air filter. The box is the air filter housing. Chances are the oil level in the gearbox is too high. And chances are it is too high because the oil has a lot of gas mixed in it. The gas can come from compression getting past the rings or from the fuel valve on the gas tank not getting turned off when the bike is not being ridden or from a bad fuel valve letting gas pass even though the valve is turned off. A bit of the excess oil/gas mixture gets carried out the gearbox vent tube and into the breather chamber, (PVC valve), then into the air cleaner housing. I suggest you do an oil change and do it as needed to eliminate the problem. Alternate to that is a top end job for $750 or so. But first check the fuel valve to be sure it is working properly. Please rate my answer. Thanks. tombones49_176.gif

Jun 14, 2011 | 1994 Honda CB 250 Nighthawk

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