2007 Arctic Cat Y-12 90cc ATV Service Manual, Page 3Get this manual
Specifications CARBURETOR
Type Main Jet Slow Jet Pilot Screw Setting (turns) Jet Needle Needle Jet Throttle Valve Cutaway Idle RPM Needle ValveSeat Float Arm Height Throttle Cable Free-Play (at lever) Keihin PTE 80 40 38 NBSD-3 3.42.5 3.0 1700 1.6 10.2 mm (0.40 in 6.0 mm (0.25 in
Break-In Procedure
A new ATV and an overhauled ATV engine require "break-in" periodThe first month is most critical to the life of this ATVProper operation during this break-in period will help assure maximum life and performance from the ATVDuring the first three hours of operation, always use less than 12 throttleVarying the engine RPM during the break-in period allows the components to "load" (aiding the mating process) and then "unload" (allowing components to cool)Although it is essential to place some stress on the engine components during break-in, care should be taken not to overload the engine too oftenWhen the engine starts, allow it to warm up properlyIdle the engine several minutes until the engine has reached normal operating temperatureDo not idle the engine for excessively long periods of timeAfter the completion of the break-in period, the engine lubricant should be changedOther maintenance after break-in should include checking of all prescribed adjustments and tightening of all fasteners