APE - Transmissions

TRANSMISSION UNDERCUTTING

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

Racecut...
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 or gears.
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.

There are times when small things like clips and spacers are unusable. These parts will be replaced at a nominal charge when servicing transmissions.

We also operate a complete aerospace-type CNC machining facility in which we manufacture our world-famous racing products. These facilities are all on-site at the APE race shop. Besides the services listed below, APE also offers:

Complete Machine Work Service
Crankshaft Service
Cylinder Head Service

Call APE to place a transmission work order. (661) 256-7309

Please read our shipping instructions carefully.

Include an APE work order form when sending parts for labor.

Ship parts to:
APE
7347 Rosamond Bl.
Rosamond, Ca. 93560

CLICK TO GO TO THESE INDIVIDUAL TRANSMISSION PAGES

HAYABUSA	KAWASAKI KZ	SUZUKI GS	KAWASAKI ZX

What exactly is undercutting?

The transmission gears lock together with a series of "dogs' or "dogs and slots" The photo below shows several of the dogs engaged together so that both gears turn together. Under hard use, the gears can began to separate until the dogs become disengaged, this causes the transmission to jump out of gear.

Now notice in the above photo the dogs that are in the circle. They both have angles cut on them where they meet. This causes them to lock together. They cannot separate without first backing up to unload the angles. This is an undercut. On APE transmissions, all of the dogs get these precise angle cuts.

Road race "up and down" cuts have angles machined on both sides of the dog so it works the same way under acceleration load and deceleration load.

HONDA
CB750 sohc	LC55-3
CBR600	LC56-3
CBR1000RR 2005 & up	LC56-3

SUZUKI
GS1000	LC55-2
GS1100 / 1150	LC55-2
GSXR600 / 750	LC56-2
KATANA 600	LC56-2
RF600	LC56-2
SV650	LC56-2
GSXR1000 ALL	LC56-3
GSXR1100 OIL COOLED	LC55-2
GSXR1100 W-COOLED	LC55-2
HAYABUSA GEN 2 Pro Cut	LC58-2
HAYABUSA GEN 1 Pro Cut	LC58-1

KAWASAKI
KZ900 / 1000	LC55-2
GPZ/J models	LC55-2
ZX6 THRU 97	LC56-2
ZX6 98 LATER	LC56-3
ZX7	LC56-2
ZX9 THRU '97	LC56-2
ZX9 '98 LATER	LC56-3
ZX10	LC56-3
ZX1100, ZRX1100	LC55-3
ZX11	LC56-2
ZX12	LC56-3
ZX14 PRO CUT	LC58-2

YAMAHA
FJ1100 / 1200	LC55-3
FZR1000	LC55-3
FZR400	LC56-3
R1	LC56-4
R6	LC56-4
V-MAX	LC55-3

LC55-2		$403.70
LC55-3		$411.44
LC55-4		$511.50
LC56-2		$443.30
LC56-3		$495.00
LC56-4	.	$520.30

LC57-1	(undercut 2nd gear only)	$195.00
LC58-1		$548.90
LC58-2		$599.00
LC58-1X2	Pro-cut Hayabusa Tran. (up and down cut)	$899.00
LC61	Magnaflux transmission	$148.50
LC850-Trans	Hardweld trans. gear (ea)	$154.00

Up and Down cuts double price.

APE provides online pricing as a service convenience only. These prices are not binding and are subject to updates without notice. Though we try hard to maintain accurate up-to-the-minute online pricing, it is best to call APE and check with the desk for pricing if you have any questions.