redbyron
Briar Hopper
Can anyone suggest where I might find an advance mechanism for a '79 xs650? Thanks
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I also need an advance mechanism
- Thread starter redbyron
- Start date
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- Tags
- electrical
MikesXS used to sell them. They still include them in the Pamco kits that include all of the advance stuff. Maybe if you email them they can help you.
Classic
rackin' up the miles
Sport wheels in Jordan, MN could mail you one. That's where I got my last three ATU's.
fullercameron
XS650 Addict
I e-mailed mike's and they said they should have new ATU's in next month. They said they will put them back up on their site when they come in.
I'm in the market too. Mine works, but the bobweights are worn and require shrink tubing over them to keep it from over advancing.
I'm in the market too. Mine works, but the bobweights are worn and require shrink tubing over them to keep it from over advancing.
You can use a hammer on the small bobweight ears, to make them larger. Your bobweight "ears" are now loose fitting in the slots of the slotted disk. Expand the "ears" until they are a tight fit in the slots. This will restore the correct advance range to the ATU.
fullercameron
XS650 Addict
Retired gentleman
Thanks for the advice. I actually found an earlier thread where you had suggested peening the tangs to get a tight fit in the slotted disc. I did this, and it helped a bit, but it appears that the problem is that the spine of the weight is actually worn from slapping into the stop.
The advance springs that were on the bike when I got it were loose, so I ordered replacements from mike's which needed some shortening to get the proper return. Not sure if the looser than normal springs were the cause, but there is a visible wear mark on the back of the weight where it contacts the base.
I would love to find a replacement set of weights, but it appears that the easiest fix is just to replace the advance unit.
I ended up fitting a piece of shrink tubing over the worn area of the weight and it now shows the timing to be correct at both advanced and retarded positions. The tubing works, it just isn't much of a permanent fix. I feel a need to check it every couple of days to make sure it hasn't come off.
Again, thanks for the advice. I'm sure that this works in many cases. Mine were certainly loose in the slots, it just didn't fix my particular problem.
Thanks for the advice. I actually found an earlier thread where you had suggested peening the tangs to get a tight fit in the slotted disc. I did this, and it helped a bit, but it appears that the problem is that the spine of the weight is actually worn from slapping into the stop.
The advance springs that were on the bike when I got it were loose, so I ordered replacements from mike's which needed some shortening to get the proper return. Not sure if the looser than normal springs were the cause, but there is a visible wear mark on the back of the weight where it contacts the base.
I would love to find a replacement set of weights, but it appears that the easiest fix is just to replace the advance unit.
I ended up fitting a piece of shrink tubing over the worn area of the weight and it now shows the timing to be correct at both advanced and retarded positions. The tubing works, it just isn't much of a permanent fix. I feel a need to check it every couple of days to make sure it hasn't come off.
Again, thanks for the advice. I'm sure that this works in many cases. Mine were certainly loose in the slots, it just didn't fix my particular problem.
