2010-2011 Yamaha RS Vector / RS Venture Service Manual, Page 87Get this manual

2010-2011 Yamaha RS Vector / RS Venture Service Manual, Page 87

INSP ADJ High altitude tuning Atmospheric pressure decreases and engine output becomes low at high altitude locationsBecause
altitude tuningThe following changes are usually performed in high altitude tuning To increase the clutch engagement and
shifting speed, changing to larger spring constant or using lighter weights and rivets(decreasing primary sheave thrust)
Increasing the reduction ratio of the driven geardrive gear(increasing the driving performance) Refer to "HIGH ALTITUDE TUNING"Engine