Cylinder Head Repair Service 4 Valve Single Motorcycle Quad Valve Job on 2040-parts.com

Fastheads.com offers complete dirt bike head services for newer motocross 4 valve heads.  This packaged service includes removing the valves, soda blasting the carbon from the dome and ports, total inspection, seats cut with a multi angle seat profile and then professionally assembled and vacuum tested.  Stem heights and spring pressure is check and corrected if needed.  We only cut seats to new valves.  You can send yours or we can supply.  Please see our complete rebuild packages with parts in our ebay store under your model.  Motorcycle valves are hard coated and can not be ground.  All machining is performed on our race developed Rottler SG7 seat and guide machine with pilots and tooling designed for the motocross type heads.  This is one of the only machines that consistantly cuts seats to concentricity tolerances in the tenths of a thousanths.  Price is for labor only. 

Check out our ebay store for packages with valves, springs and seals included at a package price.

Kick start, single cylinder, high rpm motocross race motors need perfect guide to seat and valve to seat concentricity in order to start easy and maintain a quick throttle response.  This is not just your typical automotive machine shop valve job.  Old school methods do not work on these new high RPM heads.      

Please see our packaged head deals with new valves, springs, seals etc in our ebay store. 

Call Brent at Racers E.R. / Fastheads.com 435-668-7776. 

We also install Beryllium Copper seats compatable with Titanium valves and Bronze Manganese guides.  Porting Available.    

More info available at fastheads.com and crfheads.com  WE SHIP TO DEALERS AND RACERS AROUND THE WORLD.

We offer a large variety of Kibblewhite, FactionMX, Xceldyne and OEM Titanium and stainless along with spring kits, seals, guides, Beryllium seats and all other parts to match your riding needs.  If you send in your complete head with cam, rockers, shims, tappets, etc. we can adjust the valves for an additional $35. 

you just want the seats cut in a bare head and returned bare we charge $100.

Please check our ebay   for your paticular model.

Things you should know.  Old School hand grinding and Neway hand cutting processes do not work on these new MX style heads due to the small diameter stems and the large distance to the seat from the guide.  Your valve seats wear almost as fast as the valves on these high-rev engines.   Worn seats are rounded convex and when the flat surface of a new valve face creates a very small contact patch creating less heat transfer and increased wear along with low compression, low HP, backfiring, tuning and hard starting situations.   Most mechanics just install new valves and call it good because they don't have the high dollar machining equipment needed on these new style heads.     If you want an endurance or the Ultimate race head we can build it.   Dealers and race teams are welcome.  We use the new Rottler SG7 seat and guide machine specially designed for accuracy and tooled for the power sports industry.   

Please check out our ebay store for all your engine parts, complete MX engine rebuilds and motorcycle tool needs.   

Send Heads and Engines to:  Racers ER / FastHeads.com 1141 E 540 N #7, Saint George, UT 84770

We operate one of the largest mail order style services for complete engine, transmission and head work in the world for off road race bikes.  It's our specialty so we can save you money and headaches.  See us at the WORCS and AMA off road races and other events around the west.   Brent Kirk has been involved in racing and the technical aspects of engine building for the last 38 Years. 

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