DirtTricks - Cam Chain Tensioner for KTM 250 SX-F / XC-R and KTM 400-530 4-stroke and KTM 450 SX-F / SXS-FThe Dirt Tricks Timing Chain Tensioner resolves issues with a slack timing chain on the new 4 stroke motors. The 2008 and newer four strokes use a timing chain tensioning device intended to develop its force using the engine oil pressure hydraulically. The OEM components have serious flaws, which can leave the timing chain in a slack condition. This can have disastrous consequences. The Founder of Dirt Tricks developed our timing chain tensioner as a