Undercutting a transmission
involves machining angles on the engagement dogs and slots to
prevent the transmission from jumping out of gear under load.
There are three types of undercuts available from APE
This cut is performed on the side of the dogs that are loaded
on acceleration. Recommended for hot street bikes and drag racers,
dwarf cars, etc.
Up and down cut....
Both sides of the dog are cut to also prevent jumping out of
gear on down shifts. Recommended for road racing.
Under cutting notes... Some of the newer sportbikes are
coming from the factory with undercut gears in the transmission.
When you send us your trans, if it has factory undercut that
is adequate, you will not be charged for undercutting that gear
If dogs are rounded off due to repeatedly slipping out of gear
of missed shifts, they can not be undercut. You will be notified
by APE tech staff if any of your trans parts are unusable.