chain appears to be a little loose. :O
I use 1/8" aluminum shims that I stack between the carrier and rear most part of the swinger to keep the 91-92 axle straight. I haven't thrown a chain since.
Looks like the front left bolt holding the carrier in place is loose?If so the twisting could easily break the rear plate and cause slack/misalignment in the chain.
Im not sure of what caused it but all I have to say is DAMN your were flyin down the ole coal road!!!!
My carrier used to work loose with washers... until I replaced them with the OEM bolts.
I'd recommend a skid plate.
Who knows,maybe a carrier bearing let go.
Man that's a freak break...
Loose bolts allowing movement?
Something torqued the carrier forward on the left side. You can see where the stud broke it started to take the thread with it. I wonder it you picked up a rock in between the chain and sprocket.....?
I'd have to speculate with Gillio something got up in there. Need a skid plate if you're gonna be running that fast through bumps and rocks. At high speeds it don't take much to cause some flex or movement in there.
Nice camber shims btw amazing that aluminum junk is holding together!! Lol
Running in the rocky terrain without a skid plate is asking for trouble. A rock could have done this, no doubt.
Yep PRN skid plates on both my rides.A must on trails and MX.
I looked over everything today. All bolts were tight. Something must have gotten in between the chain and sprocket don't see any marks on the sprocket though

. Looking at some PRM skid-plates
Watching the video, it looked like right after the rocks on the trail it spit the chain off/ broke the adjuster stud & plate....
Those adjustment studs are vulnerable even with a skid plate. I thought I was the only one with that kind of luck
Well, I will try to get it fixed up by the weekend with all OEM bolts and hope it doesn't happen again. If it does the swing arm is getting chucked.
Is your swingarm bearings good. I had the bearing on the chain side go bad and it was kicking my chain off.
Both frame mounted chain rollers in place?
Everything is new and everything was is place LOL. Yes the chain rollers are in place.