WMR

WMR has important information regarding the 2004 Kawasaki & Suzuki KX250F & RMZ250F.
Through extensive testing and development with these new bikes, we would like to bring a few items to your attention that have caused us concern.

We have determined that the stock valves are made of two pieces fused together. In other words the valve head is fused to the stem during manufacturing. This is not a recommended method for any race motor, and we can only surmise that it was done as a budgetary measure. Here at WMR we have seen numerous motors destroyed due to valve heads braking off. When the head comes off it bounces around in the cylinder damaging the other valves, head, valve seats, guides, and piston. On many occasions it even bends the crank shaft. It goes without saying that this causes a very expensive repair.

The factories are issuing a bulletin to dealers and customers recommending a valve replacement after every 15 hours of riding. We can understand the manufacturer recommending top end replacement on a two stroke that often, because it is relatively inexpensive to replace a piston and ring , but replacing stock valves, springs, retainers and keepers can run several hundred dollars not to mention the labor to do the work, as well as other items that should be replaced while the motor is opened up. It is not uncommon to have a repair bill of $1,800.00 or more.

THE BIGGEST PROBLEM IS, WHAT TO REPLACE THE DAMAGED VALVES AND SPRINGS WITH?

Should you put back in the stock valves only to have them break again in as little as 15 hours? At WMR we can not in good conscience recommend doing that, so we decided to come up with a permanent solution and add performance at the same time.

WMR has developed custom ONE PIECE TITANIUM valves with Titanium retainers and keepers along with custom rate Duel Springs. The result is a stronger system that will hold up under the demands of Motocross competition. We also recommend the installation of a WMR High Compression Piston and rings along with WMR Head Porting to top off the modification.

We are also testing bronze valve seats that provide better seal and wear. All these items are currently being track and Dyno tested and they should be ready for release very soon. Price is still being determined on these modifications and we will be offering a few different kits to meet everyone's budget. We know the components will cost more than the stock units however with increased life and superior performance, they will be well worth it.
We will post on our Web Site as soon as everything is ready. We ran some of these mods in Texas and Vegas and everything was working great, we just need a little more time to fine tune everything. You can call the shop toll free at 1- (866) WMR-RACE (866-967-7223) or email us at info@wmr1.com to get more information.


THIS IS OUR NEW VALVE HEAD MODIFICATION. THE CYLINDER IS PORTED TO WMR SPECS AND WE HAVE INSTALLED BRONZE VALVE SEATS AND OUR OWN WMR ONE-PIECE TITANIUM VALVES THAT ARE FLAT TOPPED FOR IMPROVED COMPRESSION. COMBINE THEM WITH OUR HIGH COMPRESSION PISTON AND DUAL ACTION SPRINGS FOR THE ULTIMATE IN FOUR STROKE PERFORMANCE. WE ALSO OFFER HIGH PERFORMANCE CAMS, AS WELL AS LIGHTENED AND BALANCED CRANKS. WE HAVE BEEN GETTING SOME AWESOME NUMBERS ON THE DYNO AND THE BIKES FEEL GREAT ON THE TRACK TOO.	THIS IS WHAT HAPPENS WHEN THE TWO PIECE STOCK VALVE COMES APART. NOTICE THE TWO VALVE STEMS STICKING OUT OF THE GUIDES. WHEN THE FIRST VALVE HEAD CAME OFF IT BOUNCED AROUND INSIDE THE CYLINDER UNTIL IT HIT THE OTHER VALVES AND BROKE THEM OFF. THE DAMAGE TO THIS HEAD IS NOT REPAIRABLE. SOMETIMES WE CAN SALVAGE THE HEAD IF ONLY ONE VALVE HEAD BROKE BEFORE THE MOTOR LOCKED UP. IN THIS CASE THE VALVE HEAD WEDGED ITSELF BETWEEN THE PISTON AND HEAD CAUSING THE CRANK SHAFT TO BEND ALSO.

CHECK OUT THESE BEAUTIES! ONE PIECE TITANIUM FLAT TOP VALVES, PRECISION MACHINED TO EXTREMELY TIGHT TOLERANCES FOR THE BEST WEAR AND PERFORMANCE.	THE BRONZE SEATS ARE STRONGER THAN STOCK AND A BETTER SEAL IS CREATED AS THEY BREAK IN.

Check out our web site at www.wmr1.com for all your Motocross performance needs.