Honda Motorcross Service

Honda Motocross / Offroad Bike Services

Click on [Service Form] and send us your engines!


Cylinder Head Machine Work: $99

Cylinder Head Recondition: (This service with stainless steel intake conversion is for the Trail rider or economical fix to adjusting Honda Heads) We soda blast clean the cylinder head before inspection. Then we surface the gasket surface areas to ensure that the areas are flat before machining. Then the cylinder head is machine cut 5 angle seat profile designed to increase air-flow and port velocity on a machine center also ensure valve seat profile consistency. Then the cylinder head is hand washed and painted to ensure longevity. Then assembled including cam install and valve shim set up (parts not included) and pressure tested.

$99 4-valve head *add Kibblewhite Stainless steel intake valves and springs for $199 [click here]

Performance Cylinder Head Valve Job for Honda CRF250/450 : (This is the Honda Fix to adjusting valves with HP increase for the Racer) We soda blast clean the cylinder head before inspection. Then we surface the gasket surface areas to ensure that the areas are flat before machining. Then the standard steel intake seats are removed and replaced with beryllium copper to accomidate Titanium intake valves The standard exhaust guides are removed and replaced with bronze guides. Then the cylinder head is machine cut 5 angle seat profile designed to increase air-flow and port velocity on a machine center also ensure valve seat profile consistency. We blend the seat to the port runners to increase velocity. Then the cylinder head is hand washed and painted to ensure longevity. Then assembled with new titanium intake valves, black nitrided exhaust valves, new valve springs and valves seals. This includes cam install and valve shim set up (parts included) and pressure tested.

$599 4-valve head *or just the service with seats and guides for $299 4-valve head

Complete Race Head Set up : We soda blast clean the cylinder head before inspection. Then we surface the gasket surface areas to ensure that the areas are flat before machining. The the valve seats are replaced with beryllium copper seats machine cut 5 angle seat profile designed to increase air-flow and port velocity. We match the seats to port runners to increase velocity. Also included in race set up the head is ported to your specific racing needs. Then the cylinder head is hand washed and painted to ensure longevity. Then assembled including cam install and valve shim set up (with Titanium Valves, springs kit) and pressure tested.

$1350 4-valve head $1550 5-valve head *parts included


Other Service Available:
1. Cut Valve Seats $40 each bare head includes cleaning and inspection.
2. +1 mm valve angle radius $50 per valve
3. Valve Seat Replacement $100 1st one then $60 each additional
4. Valve Guide Replacement $40 1st one then $20 each additional
5. Cylinder Head Porting $200 with any valve job.


Honda CRF250R

Complete Motor Rebuild: $1299

Disassemble complete engine, clean, inspect and replace parts that are needed. This includes clutch, transmission, engine bearings, crankshaft, cylinder, cylinder head, valve guides, valve seats, cam, chain, oil pump, water pump and check everything for abnormal wear. We reassemble using new gaskets, main bearings and rebuild or replace crank, we ball hone and deglaze your cylinder and install new piston, rings, pin and clips. We also recondition the cylinder head with 5 angle machine seat profile, new intake valves, seals and cam chain.

CRF250R or X Cylinders and Top End Kits :

1. Replacement cylinder $200
2. Big Bore Kit starting at $469
3. Piston Kit (std) with top end gasket kit starting at $180
4. Performance pistons with gaskets starting at $270


Honda CRF450R

Complete Motor Rebuild: $1299

Disassemble complete engine, clean, inspect and replace parts that are needed. This includes clutch, transmission, engine bearings, crankshaft, cylinder, cylinder head, valve guides, valve seats, cam, chain, oil pump, water pump and check everything for abnormal wear. We reassemble using new gaskets, main bearings and rebuild or replace crank, we ball hone and deglaze your cylinder and install new piston, rings, pin and clips. We also recondition the cylinder head with 5 angle machine seat profile, new intake valves, seals and cam chain.

CRF450R or X Cylinders and Top End Kits :

1. Replacement cylinder $200
2. Big Bore Kit starting at $469
3. Piston Kit (std) with top end gasket kit starting at $180
4. Performance pistons with gaskets starting at $270