- Joined
- Jun 17, 2009
- Messages
- 642
My 73 850 motor has been out of the frame for the past month and in the hands of a very capable and well known Commando engine rebuilder. In short, my motor is very worn out, and needs a lot of parts and labor. More on the cam and valve problems to follow in a later post.
12 years ago I installed the spring loaded automatic cam chain tensioner.
No known problems during that time period, until now.
My guy called me to tell me he wanted me to bring him the stock cam chain slider, and that there was no way he would install the auto unit on my bike, or any other bike. The damage it caused was significant.
It is just too damn tight. Period.
That tightness caused the shaft for the intermediate gear to wear, or increase the size of the hole the shaft goes into,
in the forward facing side of the hole, in both the inner and outer covers. In addition, the shaft movement increased the depth of the hole in the outer timing cover, so much so that my mechanic had to machine a 175thou spacer to take up the slack in the outer cover. In addition, he had to fill in the forward wear part of the inner cover hole the shaft goes in to. He feels the auto tensioner kept the cam chain way too tight. I have seen, and are paying for the damage caused.
I advise everyone to be made aware of this, and seriously consider taking their auto unit out immediately, and go back to the stock set up.. So what if you have to check the tension every 5000 or so miles.
12 years ago I installed the spring loaded automatic cam chain tensioner.
No known problems during that time period, until now.
My guy called me to tell me he wanted me to bring him the stock cam chain slider, and that there was no way he would install the auto unit on my bike, or any other bike. The damage it caused was significant.
It is just too damn tight. Period.
That tightness caused the shaft for the intermediate gear to wear, or increase the size of the hole the shaft goes into,
in the forward facing side of the hole, in both the inner and outer covers. In addition, the shaft movement increased the depth of the hole in the outer timing cover, so much so that my mechanic had to machine a 175thou spacer to take up the slack in the outer cover. In addition, he had to fill in the forward wear part of the inner cover hole the shaft goes in to. He feels the auto tensioner kept the cam chain way too tight. I have seen, and are paying for the damage caused.
I advise everyone to be made aware of this, and seriously consider taking their auto unit out immediately, and go back to the stock set up.. So what if you have to check the tension every 5000 or so miles.
