Uploaded September 2020 | Updated September 2026, 1 hour ago

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ZCI have a new 14 tooth piston out featuring a stronger rack. The previous rack was pretty strong so wanted to see how well this fared under a 3500 cycle stress test with a M110 spring.

** Update piston has now performed over 50,000 cycles and still no damage.

ak2m4.co.uk/internal-parts/pistons/zci-piston-14-teeth-reinforced