I recently acquired what I thought was a 71 Lightning, and am trying (unsuccessfully) to strip the engine down. After being left outside with no spark plugs in, the pistons are well and truly seized in the barrels...
After trying to unseize for a while (a week now - lots of heat treatment, gentle but persuasive hammering, penetrating lubricant's, and even a dose of Phosphoric acid...) I am thinking maybe I cut my losses,,,
I should just strip down what I can, get another used set of barrels, and then re-sleeve or re-bore that one with new matching pistons...
According to my parts book the barrels are part # 71-1464. When I look at the actual seized barrels, they appear to be Part # 71-1033.
The engine VIN on the case is XE 02985 A65L, which I think would be a December 1971.
My question is - what do I look for? The Part # in the book, the Part # on the bike, or will any barrels from an A65 fit??? Thanks Adrian