Posted December 17, 2005 - 12:36 PM
my 03 450 keeps b/firing everytime i back off. my old 400 did the same but not every time any ideas , i will be looking at the valve clearances and fueling , need some ideas where to start first the bike is bog standard and is uk model
Posted December 17, 2005 - 02:49 PM
Posted December 21, 2005 - 10:34 AM
Posted December 21, 2005 - 01:03 PM
Posted December 21, 2005 - 05:46 PM
thanks for post >> big flame from rear some times im told and dont know about jets will look at plug etc ref mixture yet
Big flame backfire (blue) would be from header or exhaust. Maybe leaky carb boot, but flames I would say exhaust.
I would check everything, but your exhaust first. Just your header out of allignment can make your bike spit foot long blue flames (trust me, been there....) If you have an air leak, jetting changes won't do much all.
You might want to change your exhaust gaskets, when is the last time you changed them?