KX Head rebuild seats cut Upgrade CrN Ti Valves, springs, seals assembled

$629 Fastheads general MX head service with all new Titanium Del West CrN PVD Coated valves for extended valve life and full power, OEM springs and viton seals for the KX. We remove the old valves, soda blast away carbon and make a complete inspection. The seats are machined using...

$629 Fastheads general MX head service with all new Titanium Del West CrN PVD Coated valves for extended valve life and full power, OEM springs and viton seals for the KX. We remove the old valves, soda blast away carbon and make a complete inspection. The seats are machined using our race proven Rottler SG7 seat and guide machine. We cut a concentric seat profile that reduces valve face wear. The head is then assembled with genuine Kawasaki valves, valve springs, guide seals, and vacuum tested for quality. We re-use your spring base locators, retainers and keepers if in good condition. 04-06 models are unpdated with newer intake spring, retainers and locators. Many of KX original seats crumble starting at the outside of the seat ring bore. If this has happened or if the seats have been previously re-machined we will call with an estimate. If the motor has lost oil pressure due to lack or oil or the cam caps are over torqued during a valve adjustment the cam may partially seize and cause damage to the journals. We can usually fix for $35 to $95. We can also adjust the valve shims for another $35. You can send your head in for inspection and estimate prior to purchase. Fill out the work order on our web page. Most KX Motocross heads should be serviced every 100 hours or less for peak performance and reliability.

Call Brent if you have any MX head service questions. 435-668-7776

We offer many service packages in our E-bay store. Here's a menu.

$140 cut seats only (bare head) guides must be withing spec.

$195 general head service, soda blast head, inspect head for all needs, cut concentric seats, professionally install your valves, springs, seals etc. Stem and spring heights are checked and corrected and then vacumm tested.

$569 This service with all OEM Ti valves, springs and seals. (the stock Ti valves wear out a lot faster)

$469 This service with stainless valves and matching heavier springs. Shoud be used for trail riding. 2hp loss with stainless kits.

$399 Bare head rebuild for racing with all Beryllium Copper seats and Bronze Manganese Guides. New valves must be supplied for proper seat / valve face alignment.

$35-$95 cam journal repair (bare head)

$140 porting when done in conjunction with a general service. $250 without service

$999 New head fully assembled with OEM valve train tested. Call

$1395 Complete top and bottom end motor rebuild.

High RPM small valve stem Motocross motors required specialized high tech valve seat machining equipment and skilled machinist in order to cut a concentric seat. Most dealers, mechanics, race shops and automotive machine shops do not have this capability. The result from a poor seat cut is hard starting, valve stems break and extreme wear on the valve face and guide.

We highly suggest staying with Titanium valves vs the installation of aftermarket heavy stainless steel valve kits that reduce output by 2hp, slows acceleration and peak RPM. The use of Stainless require heavy springs that prematurely wears the stock seats. All new dirt bike heads are designed to use Titanium for these reasons. The seats need to be professionally cut (part of this package) or they will wear out any new valve. 3 to 5 day turnaround.

Machining Process: Heads that produce this kind of HP, RPM and high thermal energy need special machining with very close tolerances for perfect concentricity. We use the super accurate race developed Rottler SG7 seat and guide machine and cut all seat profiles with perfect concentricity to the guides centerline. There are only a few race shops around the country including Racers ER / fastheads.com that can properly do a valve job on these new style MX heads. You may want to read our article in Thumpertalk under engines to better understand the in these heads compared to general automotive.

Seat Blending: This is basically porting where it is needed the most between the bottom of seat where it meets the casting up to the guide. We take special care in producing a smooth unobstructed port job in this area for a lot better flow than factory.

Seat and Guide Replacement: Beryllium Copper for increased cooling and major anti wear qualities when used with Titanium valves. We replace worn or broken guides with Bronze Manganese for the same reasons. It runs $399 to replace all guides and seats and cut seat profiles in a bare head. We can usually fix for around slightly siezed cam journals and lifter bores for $95.

If you what to maintain maximum power you have to use Titanium valves as originally designed. All current motocross engines use Titanium Valves for this reason. If you have decided to go with steel valves and heavier springs for economical wearability you will loose more power than you can gain back from porting and cams.

If you want a complete port and polished head we charge another $195 when done in conjunction with the above service.

Please check out our ebay store for motorcycle tools, rebuild kits and rebuilding services.

Send your heads and engines to:

Racers ER / Fastheads.com1141 E 540 N #7, Saint George, UT 84770

Call Brent at 435-668-7776

We operate one of the largest mail order style service for complete engine, transmission and head work for off road race bikes. It's our specialty so we can save you money and headaches. See us at the WORCS races and other events around the west. Brent Kirk has raced and has been involved with the technical aspects of engine building for the last 39 Years.

Racerser / Fastheads.com is based out of Saint George, Utah. 435-668-7776.

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On Apr-05-08 at 17:49:47 PDT, seller added the following information:

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