Fast photo view of the CRF Big bore 262 / Ferrea valve swap...more to come..

Parts List:

2005 Cylinder with 80mm bore and 04 oil mod by Eric Gorr
JE Piston Kit
Moose/Cometic Top End Gasket Kit.
2 Ferrea/RHC Coated Intake Valves
2 KibbleWhite Exhaust Valves
Ferrea/RHC Spring Kit with Ti Retainers and spring seats
2005 Head Reconed by Staley Machine Dallas, PA - Seats ground, Decked .008”
R model Flywheel
Hot Cam 2

Other Mods bike had prior to this swap:

CCC Mods to air box.
Bill’s Exhaust with Spark Arrester in place.
JD Jetting Kit 45 Pilot, Red Needle #5, 175 Main, 55 Leak
14/50 gearing
Hinson Clutch upgrades.
Magura Jack Clutch
05 Head with mild port blending and clean up.
Hot Cam Stage 2
JE Piston
04 250X Head Gasket (thinner)

Ready to go

Ready to go

Ready to go

Ready to go

Slide carb

Slide carb

Right Side Timing Marks

Right Side Timing Marks

Left Side Ignition TDC

Left Side Ignition TDC

This is the cam timing position

This is the cam timing position

Rocker Shaft

Rocker Shaft

Cam / Parts

Cam / Parts

Remove Head nuts

Remove Head nuts

Head coming up

Head coming up

Head off

Head off

Piston rod

Piston rod

Cylinder

Cylinder

Striped head

Striped head

Bare Head

Bare Head

Look at the Valves

Look at the Valves

2 Cylinders

2 Cylinders

2 cylinders from top

2 cylinders from top

Gap the ring

Gap the ring

Drop Cyl/piston on

Drop Cyl/piston on

New Piston in place

New Piston in place

Chain Guides

Chain Guides

Left is R, Right is X

Left is R, Right is X

Head Decked .008"

Head Decked .008"

RHC Exh. on Left, Stk on Right

RHC Exh. on Left, Stk on Right

RHC Int. on Left, Stk on Rt

RHC Int. on Left, Stk on Rt

Stk on Left, RHC on Rt.

Stk on Left, RHC on Rt.

Home made installer

Home made installer

Exhaust in place

Exhaust in place

Intake valve in place.

Intake valve in place.

Top View with new Valves

Top View with new Valves

Bottom View.

Bottom View.

Reset cam timing

Reset cam timing

Timing chain in place.

Timing chain in place.

Reconed Head in place

Reconed Head in place

Almost there.

Almost there.

Done

Done