On-board glow driver = weight, weight = bad.

How would one increase the compression in a modern 4-stroke like the newer Saitos (1.25, 1.00, .82a etc.) if one wanted to try to tune for more power? The engines now are made to run with some high nitro, but you could tweak the compression to be as high as possible without detonation or preignition your specific nitro level.