Sled seems to lose power then backfired through one of the carbs and cracked the top of the airbox. Tried restarting and backfired again so towed her home. Inspected plugs - both look the same and don't look fouled. Looked down into cylinder and no real obvious damage. I think I'll try new plugs and see what happens but I'm concerned about the apparent force of the backfire...
87 Pol Indy Trail Backfire
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