If you’ve ever noticed the brief knocking when you start your 900 or 1000 it’s caused by the OEM timing chain tensioner. It’s designed to build up pressure by using oil pressure, but when the motor has sat for awhile the tensioner will lose oil pressure which allows the timing chain to jump time.

I installed the automatic timing chain tensioner from OneStopPerformance to cure mine. The install isn’t terribly difficult, but it does take a fair amount of time to complete – especially if you do a full pull-apart like I did. You’re not required to pull everything apart, but I wanted to be as thorough as possible. You could, technically, just remove the crank position sensor and the oil fill cap to view the top dead center (TDC) mark as well as the cam lobe in the oil fill hole.

It took me about 3 hours start to finish to complete (while shooting videos) and worked like a charm – no more engine knock on cold start ups.

If you’re interested in one they cost $167.99 for the automatic version (shown in my video) and they also offer a manual tensioner for $78.95.

They can be purchased at: http://www.ospracingparts.com/polari…ain-tensioner/

Be sure to watch in HD:

Here’s everything included with the kit:

Note: I managed to lose the flange bolt that secures the crush washer :rm_thumbdown: and couldn’t find it for the life of me. So I contacted OSP and it’s just a 10mm head/6mm shaft bolt. You may need to cut one to length if you happen to lose yours as well.

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