SXP Posted December 14, 2004 Is this a high wear item on these bikes and do they have to be changed out often? What are the symptoms of a weakening tensioner? The topend of these bikes make so much noise I don't know what to attribute to "normal noise and what to excessive/loud noise. Has anyone actually changed their tensioner out and noticed an appreciable reduction in topend noise? A new one is $50 and I don't want to make an unnecessary purchase. Any help/personal experience would be appreciated. Thanks. Share this post Link to post Share on other sites
Rattler88 Posted December 14, 2004 You will have to remove the valve cover to see if your chain is loose or not, if it is you will probably need to replace the rubber chain guide that the tensioner pushes against, also while your there through in a 03 YZF450 exhaust cam and you can through away that little leaver you need to pull to kick it over,the cam mod works great. Share this post Link to post Share on other sites
greg-wr400 Posted December 14, 2004 Jerry, please tell me more about the 03 yz exhaust cam... I can lose the comp. release? How does this improve overall hp?longer duration? lift? g 😢 Share this post Link to post Share on other sites
Rattler88 Posted December 15, 2004 Theres a lot of threads on here about it or you can send me your number and I will call ya. I did it to my 01 WR426 and it works great,noticed that it has a lot more grunt of the start through mid range and with no power loss at all on top, even seems to run better. Heres the site http://www.photonracing.com/PDF/450cam.pdf check it out. Share this post Link to post Share on other sites
