This camshaft is one of our favorites for 890cc and bigger Honda CB750 race bikes. (12+ comp ratio or more)
This camshaft is perfect for road race or drag race applications.
Very similar to the Mega-cycle 125-X12, but with a 112 lobe center.

INSTALLATION INFORMATION

ENGINE:  Honda CB750F2 (75-78); CB750K (69-78) SOHC 8v

 

INTAKE

EXHAUST

VALVE LASH (INCH):

.004"

.005"

VALVE LIFT (INCH):

0.420

0.430

DURATION:

258.5°

261°

LOBE CENTER:

109.75°

115.5°

 

INTAKE OPENS     19.5°     BEFORE TDC

EXHAUST OPENS     66°     BEFORE BDC

INTAKE CLOSES     59°     AFTER BDC

EXHAUST CLOSES     15°     AFTER TDC

VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.


 

MAKE

Honda CB750 SOHC

MODEL

K model

YEAR

69-78 (69-76 K model valves)

CAMSHAFT

CX-10

INTAKE VALVE SIZE

32mm standard.

EXHAUST VALVE SIZE

28mm standard.

LASH

0 lash for checking.

INTAKE SINK

No sink. 1.700 valve stem protrusion.

EXHAUST SINK

No sink. 1.700 valve stem protrusion.

VALVE TO VALVE CLEARANCE

.051 Average

SPRINGS

ENV-008. 65lbs 1.455 installed height. no shims.
80lbs with 1.395 installed height (.060 shims)
ENV-009. 85lbs 1. 455 installed height. no shims. Add shims if needed.
Bee-hive ENV-010K 1.380 installed height. 90-95lbs. Add shims if needed.

INSTALLED HEIGHT

Check above.

VALVE STEM PROTRUSION

1.700. Intake and exhaust.

VALVE GUIDES

High lift guides are needed with the CX-10

 

NOTES:

 

MAKE

Honda CB750 SOHC

MODEL

F2/ F3 Supersport models

YEAR

77-78

CAMSHAFT

CX-10

INTAKE VALVE SIZE

34mm standard

EXHAUST VALVE SIZE

31mm standard.

LASH

0 lash for checking.

INTAKE SINK

.030

EXHAUST SINK

.030

VALVE TO VALVE CLEARANCE

 

SPRINGS

 

INSTALLED HEIGHT

 

VALVE STEM PROTRUSION

1.730. Intake and exhaust. (sunk .030)

VALVE GUIDES

High lift guides are required.

 

NOTES:
More specs coming soon.
Cam tower clearancing will be needed.