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RD 350 transfer port cleanup

Started by Dvsrd, March 05, 2026, 03:12:14 PM

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RDryan

#30
March 20, 2026, 06:28:47 PM
Why is it quicker? I mean is it quicker revving due to a shorter stroke? Is the three piston design attributable?...seems like more rotating mass. Is it a better design in terms of combustion design?

Dvsrd

#31
March 20, 2026, 11:49:47 PM
Quote from: RDryan on March 20, 2026, 06:28:47 PMWhy is it quicker? I mean is it quicker revving due to a shorter stroke? Is the three piston design attributable?...seems like more rotating mass. Is it a better design in terms of combustion design?
The early H1 had 60 hp, vs the T500's 47 hp. Both manufacturer's numbers.
Being a triple the H1 had a shorter stroke, so could safetly rev higher. More revs gives more power. So the H1 was given more extreme port timing/ cylinder design, and an exhaust system designed for higher revs and more power. I believe the H1 exhaust actually was expansion Chambers, "hidden" inside more traditional looking mufflers.
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