Timing belt tensioner

[fatak]

I'm in the middle of replacing my timing belt ('95 ATX) and yes I loosened the bolt in the eccentric pully that tensions the timing belt so I lost 'preset' tension from Yamaha. As far as I can tell the preset of the eccentric is a positioning more than a tension setting, as someone has already posted. If this is true and someone could post a picture of an original eccentric (never been loosened) all of us who have made this mistake would all be able to return ours to the original position. I think this should be reasonably simply since there are two distinctive holes in the tensioner pully that will define its position relative to the mounting bolt head. I have to think that this will be as accurate as trying to set the pully to 4.3 in-lbs. What does anybody else think? Has anyone tried this already?

 

[sdpatt]

The positioning of the tensioner in this picture made it difficult to install the belt because the belt was tight even before the locking pin was removed from the tensioner. You could rotate the tensioner pulley clockwise to swing the large part of the hub to the downward position to increase the room to install the new belt and increase the leverage the tensioner piston has on the pulley to apply pressure to the belt.

 

[fatak]

I saw this picture on one of your earlier posts and used it to position my pully. Was this an original position? I tried to install mine in this position and it was too hard, or seemed like more than the recommended tension. I have backed off until the two holes are both at the same horizontal height and the tension seems to be good. My theory is that if the tension is a bit too loose than the piston will compensate and make up the needed tension. If the tension is too tight then as soon as the belt stretches it will reduce the tension to the amount provided by the piston. Any thoughts?

 

[stlooiesho]

Check out this post:

http://www.shoforum.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=17;t=003777#000004