I have a 82 yamaha yz490 thats has spark but wont catch the gas goes into the exhaust whats the problem? its a 490cc but its not on your list

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• 2 Answers

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Posted on Jan 02, 2017

SOURCE: my 82' yamaha maxim 400's seat wont openhelp meoppen it

i have this bike too. There's a small compartment on the back, you need a key to open it. There's a little sliding bit that hides the keyhole. open that up, there's two wingnuts holding the seat on.

Your bike may be different, there's several different versions of this bike that i've seen. This is how it works on mine.

Posted on Sep 17, 2009

SOURCE: yamaha xt 125r wont start up

hello, check and see if plug is firing a blue color, if not you may need a stator-pickup coil, i have a 2000 warrior, it is firing, orange and white color, stator neede to be replaced, pickup coil was going out, also check ign coil, these have a problem with getting weak after a while. most likely it is your stator pickup coil, no blue fire from plug, no running the motor. my stator pickup coil was going out. no blue fire from plug, i was told by a yamaha mechanic, no blue fire from plug it will not run, has to be blue, not orange or white looking fire.make sure carb is clean and all jets inside are clean, and air passage ways

Posted on Feb 25, 2010

SOURCE: 82 550 maxun yamaha weak spark wont start good

voltage regulator or ur stator might be bad.Also check fuses.

Posted on Mar 21, 2010

SOURCE: 1986 yamaha 350 xt wont

make sure its getting fuel then check to see how much compression it has it might have a tight valve

Posted on Jun 11, 2011

Douglas Hansen

• 2050 Answers

SOURCE: I have a 1986 Yamaha yz490. it ran great until it

Your cylinder is probably full of fuel, becareful here. Disable the spark and kick it over with the spark plug out to remove the fuel.
Your problem sounds like a stuck float in the carburator. It needs to be removed and cleaned out good.

Posted on Jul 16, 2011