KTM Timing Chain Tensioner

Replaces KTM  part# 77036003000 and 77036003100. 

For the RC4, XC4, RF4 2008-2010 motors. (250, 400, 450, 505, 530, all models)

Also fits 2009-2010 Husaberg 390,450, and 570. Husaberg installation requires special instruction. (tensioner must be installed collapsed. This requires laying your bike on its side to install)

• If you have a "ticking" noise at idle, on your newer four-stroke, you need this part. (Listen to the video links below .) With OEM part. With Dirt Tricks part.

• Resolves issues with a slack timing chain on the new 4-stroke motors.

• Uses oil pressure combined with a mechanical ratchet system to prevent collapse.

• The KTM Adventure/LC8 tensioner is being developed.

The 2008 and newer four-stroke KTMs (and some earlier SX models) use a timing chain tensioning device intended to develop its force using the engine oil pressure hydraulically. The OEM components have serious flaws (reviewed below), which can leave the timing chain in a slack condition. This can have disastrous consequences.  Dirt Tricks has developed a simple, effective and failsafe replacement. The new tensioner correctly captures the oil pressure. Additionally, it uses a positive mechanical ratcheting system which prevents it from collapsing. The replacement unit will work on all newer four-strokes in 250, 400, 450, 505, 530 models using the RC4, XC4, or RF4 motor (not for the RFS motors). This means the following bikes:

• 2005-2010 all 250 four-stroke models.

• 2007-2010  450 SX-F and 450 SXS-F models.

• 2008-2010 all 400, 450, 505, 530 four-stroke models.

• 2009-2010 Husaberg 390,450 and 570.

• * Does not fit KTM 690 without a modification.

With very satisfying test results from our race bikes, we have completed CNC production of the new tensioner. They can be installed in less than five minutes.  The price is $89.00 Please call if you have questions or comments. 775-267-6361.   NOW AVAILABLE! Order by clicking here:     $89.00 Satisfaction guaranteed.

(These videos were provided unsolicited by a satisfied customer in the UK. Thanks for the endorsement "brompton92".)

Video of engine with stock unit.    

 Video with Dirt Tricks unit.

To order:

    $89.00

Installation Instructions

As the spring is inserted and you compress it, you can feel and hear the clicks as the piston ratchets into position. There are a total of 10 ratchet positions at 1mm spacing. If you extend to more than 9 clicks, you probably need to replace your timing chain.