I toasted the front aluninum piston on my 28 JD. The front of the cylinder is galled and aluminum melted and transferred to the front wall of the cylinder. The top piston ring also fused to the piston and not the other 2. I’d like to take a shot at my own question! I suspect that the piston OD is too small allowing the piston to pivot and drag on the front cylinder wall. Piston specifications were offered in another post but this is looking at cause and effect of the problem. I live in KC and will be back working on the bike on Tuesday in Topeka 40 miles away. I’d like to get my ducks in a row so i make sure we order the correct size with all the information to make the decision.
Am I close? Should the replacement pistons be larger for my Cannonball? Thanks for all your help! Steve
Am I close? Should the replacement pistons be larger for my Cannonball? Thanks for all your help! Steve
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