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Seat-Height Rule Limits Razgatlioglu's Rear-Wing Use as Higher Seat Restores Braking at Sepang

A regulation cap on seat-unit height constrains the tall rookie’s aero options, so Yamaha tested a higher tail that let him run wings and regain stopping confidence.

Overview

  • On day one of the official Sepang test, Toprak Razgatlioglu mostly ran without rear wings because his preferred low seating position would breach the FIM seat-unit height limit with wings fitted.
  • He switched late in the session to an older, higher seat unit that permitted rear wings, reporting that the bike stopped better under braking.
  • Razgatlioglu said he will try to continue with the wings in the next session, noting he must adapt his riding to make the setup work within the rules.
  • He explained he needs a smoother MotoGP style and is learning Michelin tyre behavior after years on Pirelli, citing good braking feel but different acceleration characteristics.
  • Yamaha has tailored the M1’s ergonomics for his 185 cm frame; he was 20th on the first official test day after setting a 1:58.465 for 10th in the earlier shakedown.