YZ250F Head Service Machining Upgrade CrN PVD Titanium Valve Installed

Description

Fastheads.com deals exclusively in motocross cylinder heads and valve train components for all brands.  We machine, repair and service worn or damaged heads with the latest high tech equipment designed for high RPM multi valve heads.  Old school methods of valve seat re-facing or grinding will not work on these new heads!  Our primary goal is incredible reliability and reduced valve wear while maintaining stock or more power.  We do this by using compatible alloys, DLC type valve coatings and precise machining for perfect valve to seat concentricity.  Pick from many options including economy trail to full on race packages to meet your needs.
This Ebay item is our most popular complete YZF rebuild package.  Upon arrival the valve train is remove, the head is then cleaned by soda blasting and inspected for all needed repairs.
The seats are cut with a multi angle high flow profile on our race designed Rottler SG7 seat and guide machine for precise concentricity every time.
Your head is then professionally assembled, spring and stem heights are checked and corrected, gasket surface is checked and corrected and vacuum tested for a perfect seal.
Parts included, Del West CrN PVD coated Ti valves, OEM valve springs and Viton guide seals.  If it needs guides we can replace for an extra charge.
For more we can adjust the valve shims.
Note:  For a more economical package we also offer Stainless steel valves with a matching spring kit for 9.00.  The heavier valves reduce output by 2hp and absolutely requires the stronger springs to control the extra valve weight.  The stock seat material was not designed for SS valves. Complete porting for 0 more.
Give us a call with your needs and we will estimate the cost.  Normal turnaround time is 7 days.
Check out our ebay store
for rebuild tools, shims, services and parts.
Call for options 435-668-7776
Remember, if your valves are worn out so is your seat surface.  New valve surface on a rounded seat results in a very thin contact area resulting in fast wear and less heat exchange.
We only cut seats to match new valves.  You can either supply yours or buy ours.  We offer a wide variety of valves in stainless or titanium, guide seals and spring kits to match your needs.  If you want an endurance or the Ultimate race head we can build it.  We also offer porting at a reduced price when purchased at the same time.  Dealers and race teams are welcome.  We use the new race developed Rottler SG7 seat and guide machine specially designed for these type of race heads.
Please check out our ebay store for complete engine rebuilding, seat cutting/maintenance, rebuilding parts and tools.
Send your heads and engines to: FASTHEADS
, 1141 E 540 N #7, Saint George, UT 84770
We operate one of the largest mail order type services for complete engine, transmission and head rebuilding for the Motocross Off Road Community.  It's our specialty so we can save you money and headaches.  See us at the WORCS races and other events around the west.   The owner races and has been involved with the technical aspects of engine building for the last 38 Years.
WORN VALVE SEATS HAVE TO BE RE-CUT OR FACED IN ORDER TO DECREASE NEW VALVE WEAR AND MAINTAIN PERFORMANCE. MOTOCROSS HEADS REQUIRE NEW MACHINING TECHNIQUES.
Specialized machining techniques have been developed in order to cut seats in current motocross and other small engine race style multi valve heads. This is everything you need know in order to grasp the concept of how and way valve seat concentricity is critical in performance, wear and reliability and why old school methods of seat cutting do not work.
On Apr-05-08 at 17:49:47 PDT, seller added the following information:
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