1964 What's the difference between the BSA Lightning Rocket and BSA Thunderbolt Rocket?

Good question! - and one that deserves an answer. Here it is.

Here is the big difference between the two models - the all-new high-efficiency, twin-port cylinder head and dual carburetors as used on the super-fast Lightning Rocket. Short, straight intake ports, and high compression hemispherical type head space give this free-breathing power plant a walloping charge every time - all the power that any rider can use!

1964 Difference between BSA Lightning Rocket and BSA Thunderbolt Rocket Ad available at www.DadsVintageAds.com

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