Guest Posted February 14, 2012 Share Posted February 14, 2012 Hi bought my first wr250f went out on it for ten minutes then heard a rattle and when i stopped the exhaust was glowing red. i switched off and it let out a little back fire. is this a big problem or am i panicking a bit too much? many thankssorry just realised should off put this in pitstop Quote Link to comment Share on other sites More sharing options...
Tango Posted February 14, 2012 Share Posted February 14, 2012 I don't know this bike....but generally this could be a couple of things:Ignition timing.....if the timing is out you could be running a bit hot or igniting fuel in the exhaust. Or:Fuel/Air mixture......if this is not correct you could be putting unburnt fuel into the exhaust where it is igniting.....or pre-ignition (or pinking) which can also make the engine run hot.Valve timing or valve gaps could also cause problems if incorrect. If your exhaust valve(s) are not closing fully you could be getting ignition in the exhaust as well as in the combustion chamber.Just a few thoughts.I'm sure others will add to this too..... Quote Link to comment Share on other sites More sharing options...
Stu Posted February 14, 2012 Share Posted February 14, 2012 Some bikes like mine when riden hard can cause the exhaust to glow red Is it all the time or just if you ride hard? Quote Link to comment Share on other sites More sharing options...
Guest Posted February 14, 2012 Share Posted February 14, 2012 first time i have been on it so gonna get intouch with shop i bought it from.keep u posted is this a big problem or easy fix? Quote Link to comment Share on other sites More sharing options...
giocast Posted February 14, 2012 Share Posted February 14, 2012 Tango has covered every angle - it's definitely one of those! Going by what you said sounds like it could be over-advanced ignition and you did the right thing to stop it as soon as you heard something unusual, if only as a precaution. If you remove the spark plug and study it, it could give you some clues as to what was happening although ten minutes might not have been enough to leave any tell-tale signs. Quote Link to comment Share on other sites More sharing options...
Guest Posted February 15, 2012 Share Posted February 15, 2012 thanks for your help guys i will let u know wat the problem is Quote Link to comment Share on other sites More sharing options...
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