From the yahoo group.. Now known as the Grambo trick
Ok, I have a few minutes to collect my thoughts and want to share
what worked for me when my cam chain tensioner began clattering like
the piston was loose or I had a ball bearing rattling in the top
end. I performed all adjustments with the engine off.
First, remove the 10 mm bolt from the end of the tensioner assembly.
This will expose a small screw recessed in the body of the assembly.
Take a jeweler's screwdriver that fits the head of the screw (a cheap
one from wally world or radio shack as you will prolly screw it up a
bit). Turn by hand clockwise as far as you can...it will feel like
you are winding a spring. Let it snap back as far as it will go then
attempt to turn it about 1/4 turn further. You may need to use a
small pair of pliers at this point to turn it back....not too much at
a time, just 1/4 turn.
Put the bolt back in and fire it up. If there is no change you are
prolly doing the wrong cylinder. If (as in my case) the noise is
gone or nearly gone, leave it for now and ride. In my case it
returned, so I repeated it until the noise was gone...a couple of
adjustments in that setting. After a few days it started back, so I
did it again. After the third setting of doing this, the noise has
now been gone for over 10000 miles and one year. If it returns, I'll
do it again because from what I understand, replacing the assembly
still gives you a weak spring. Something about the adjustment winds
it a bit tighter.
Some have pulled the whole thing and cleaned it and replaced it, but
I am wondering if the preloading isn't what really fixed it in those
cases. I am not convinced due to my success here, that it is
neccessary to pull it out.
Patriot Guard Rider
2000 VN750 Sere (Serendipity)
1990 GL1500 (Ole Blue)
1986 VN750 EVie (project bike, heavy custom)
VROC # 11628 / 25000-H
ARVROC # 12 Coordinator and Crowd Control
OKVROC # 18 (H)
TNVROC # 45 (H)