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Installation Information


Upon installation of your WEB-CAM camshaft, check the following. These operations are very important to engine life, please follow instructions! If your cam is described as a bolt-in in the WEB-CAM catalog, you may skip 1-5 below.


  1. Check piston to valve clearance. Provide the necessary clearance by removing material from the piston Minimum .050" intake, .080" exhaust.

  2. Check valve to valve clearance. It may be necessary to remove material from the valves or sink valve seat height in head.

  3. Check the valve spring retainer to valve guide clearance at maximum lift. Remove material from the top,of valve guides to provide a minimum of .030" clearance.

  4. Check for valve spring coil bind at maximum valve lift. Clearance at every coil should be at least .015"

  5. Be certain that cam and/or rocker arms rotate freely in head or block. Remove material from head,block, or rocker arms where necessary.

  6. Engine and cam life depend on proper installation. New or reground followers should be used when installing WEB-CAM profiles. Apply the provided assembly lube to cam lobe and follower surfaces.

  7. For proper break-in, after installation of a new camshaft, do not allow your engine to idle below 2000 RPM for the first 15 minutes of use.

Honda TRX 450 ER (06-07) SOHC 4v

Part #:

57-512

Grind:

570/993


Intake

Exhaust

Valve Lash (Inch):

.006"

.009" - .011"

Cold

Valve Lift (Inch):

0.400

0.323

Valve Lift (mm):

10.16

8.2

Advertised Duration:

264°

280°

Duration @ 0.050":

238°

244°

Lobe Center:

110°

104°

= 107° Overall


Intake
Opens

Before
TDC

Exhaust
Opens

46°

Before
BDC


Intake
Closes

49°

After
BDC

Exhaust
Closes

18°

After
TDC


Valve Timing Is Checked With Zero Valve Lash
@ 0.050 Inches Of Valve Lift.