Must Know Yfz 450 Wont Start Backfires For You
Yfz 450 Wont Start Backfires. Starts up again but won't run properly. I have a 2007 yz450f.
Yfz450 members 60 author posted october 15, 2008 it doesnt backfire any other time just when its sitting there idling and i rev it up it will back fire , it wont do it with the 170 jet. Starts up again but won't run properly. Start but dies at idle and when held at high idle or revved it back fires, blows flames out of pipe then stalls.
Changed The Spark Plug Switched Out The Coil.
It has a hmf pipe, but other than that it's stock. Timmed the motor three times it has wr timing now. Put the timing back to stock then try it.
I Checked My Valve Clearances And Changed The Jetting Before I Left For St.
Anthony's and it ran fine for the first day or two and then became the stubborn little bastard it is. Could be a stuck ring, valve shims, timing, or floading it out. Start but dies at idle and when held at high idle or revved it back fires, blows flames out of pipe then stalls.
Searched Back Firing And Did All.
I just picked up this 2005 yamaha yfz 450. Have parts for sale 2010 yfz450x engine: Starts up again but won't run properly.
I Replaced The Air Filter (Which Was Extremely Dirty) And Put In A New One.
Yfz450 members 60 author posted october 15, 2008 it doesnt backfire any other time just when its sitting there idling and i rev it up it will back fire , it wont do it with the 170 jet. Switched between stock tps and sparks tps. I have just finished cleaning the carburetor and reassembling the bike.
Im Guessing It Is Jetted Due To The Pipe.
I have a 2007 yz450f.