Suitable for Yamaha YZ250F model years 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013.

Mitaka steel valve and spring conversion kit - includes 3 x steel valves, with 3 x performance springs that are matched to the weight of the steel valves. Mitaka engine valves and springs are manufactured in the same factory as other brands but sold at a fraction of the cost. The valves are manufactured from one piece using a high quality steel alloy and extensive heat treatment processes. The valve design uses the same specifications as OEM for a direct replacement, but also incorporates a high gas flow head for increased performance.

(Item may vary from picture, you will receive the item listed)

All Mitaka components are engineered to OEM specifications or higher using the same manufacturing techniques and high quality materials.

For the majority of 2 and 4 stroke motocross bikes since the late 80's to present Best MX Shop offers - Piston kits, Connecting rod kits, Complete cranks, Main bearings, Gasket sets, Seal sets, Titanium valves, Steel valve and spring kits, 4 stroke cylinder kits, Clutch disc kits, Clutch baskets, Clutch centres, and Clutch pressure plates. If the item you require is not listed please get in contact as listings are constantly being added.

This item is usually in stock and shipped within one working day from Queensland, Australia.

Free Post Australia Wide

Please ensure you know the correct year and model of bike before you order. If you are unsure please contact your local dealer with the frame number. If your local dealer is unable to help please send the frame numbers and pictures and we will attempt to find the details. If you order the wrong parts you will have to pay postage costs and a restocking fee upon exchange for the parts in original condition; However if we make a mistake we will cover postage costs and get the correct parts to you as quickly and smoothly as possible, or issue a full refund upon exchange for the parts in original condition.