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1978 Suzuki PE/ RM cylinder

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I am currently reviving a 1978 PE 250. The cylinder is ready for a bore. Local shop advised finding a 78 RM 250 cylinder for better performance. I found a cylinder but it is identical to my PE cylinder. Cannot find any numbers on cylinders. It was on an RM crankcase.

Looked on ebay & by pics they look the same as well. Anyone know if they were the same ? Thumpertalk store part breakdown does not list numbers for the cylinder. Head gasket & reeds are the same.

Eric

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The RM cylinder has different porting, which combined with the RM pipe (which you won't see a gain without) made more power, but at less usable rpm for trail riding.

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