These pipes came off the 350 I am working on.
The one in another post that is only running in 1 cylinder.
Do you think, while the PO was riding, if the 1 cylinder stopped firing, would this have caused this blowout?
I'd think it could if the spark returned after the silencer and chamber filled with unburned fuel. When I was in high school, admittedly years ago, I'd switch the ignition off on my car while rolling down the road; turning it back on gave a loud backfire. One of those opened the muffler along the weld seam.
To this day, my 50+ year old brother will do this on any carbureted bike he owns.
Quote from: msr on June 14, 2022, 09:50:33 AM
To this day, my 50+ year old brother will do this on any carbureted bike he owns.
:lol:
:whistle:
:boom: :burnout:
I mean.. yeah.
Wonder if he filled his pants when it blew.
I cant see that blowing up being the cause of that. It would have ballooned out a bit at least. There is also other damage on the tube a bit closer to the stinger.
Ive had really bad backfires pop the pipe off at the cylinder flange as that's probably the easiest spot to release pressure.
agreed. that wasnt a backfire issue IMHO either, but i bet theres a good story there. My guess would be a crack in the aluminum that wasn't caught in time and eventually got completely out of hand.
^^^^
What he said.
That's not an explosion type failure. If you look at the ragged edge you will probably see dirty parts where it was cracked for a long time and siny parts where the two parts fretted against each other. It does look like a fatigue crack.