How do I stop oil leak from the chain tensioner (1980 XS1100 SG)

[DEEBS11]

I agree with soccer4m and the process he described. I don't see it as being the gloom and doom that is being made out to be. Back on the old forum, I couldn't begin to count the number of guys that successfully did it. Yes, there were a few that had problems. Imo and from experience, with an ACCT from the multitude of Yamaha bikes/ATV's that can be found on ebay, the ACCT is the ticket. The confirmation bias strongly favors those who have been successful.

With that...

Can you explain more how to R&R without removing? That could be a very helpful process.

The leaking was the genesis of putting on an ACCT. I don't recall reports of leaking once installed properly. And did I say, never need to adjust again?

Bonz, are you saying you agree that the procedure should be done at TDC instead of C? I think we corrected this that the setting is "C" and not TDC.

[Bonz]

Bonz, are you saying you agree that the procedure should be done at TDC instead of C? I think we corrected this that the setting is "C" and not TDC.

"C" is correct. I have edited my post to reflect that.

TDC versus C had already been corrected before I posted but I see where the confusion could come from. I should have made the note that while agreeing with the process, C is correct with respect to the manual.

[Socer4m]

I stand corrected, use C for the install of the ACCT,, according to the manuals,,however I have used TDC for a few ACCT installs and zero issues, I just make sure the engine does not rotate as the cam chain is corrected to exact tension by the ACCT.....have fun,,,,Mike in S.Diego and Pa

[bikerphil]

It has been reported that the OEM tensioner is prone to slipping out of adjustment during heavy engine braking. The ACCT can not do this because of its one way ratchet mechanism.

[Bonz]

Being completely honest, I don't know what the difference would be in C or TDC with respect to removing a tensioner and replacing it now that it has come up. Can one of the collective share the mechanical importance/difference with respect to a tensioner replacement?

Top dead center on compression or C on the exhaust stroke at the top, should make no difference. They are both the same relative positions in a static state. At least that's how I see it. However, I have used C like the manual calls for. Quite honestly, why would it matter at all? The chain runs on sprockets that are fixed. Nothing with respect to the rest of the engine would affect that.

[bikerphil]

My take on it is the C position keeps all the slack out of the rear of the chain (keeps it taut) via the position of the cam lobes on the springs. That way when the tensioner is installed, everything is nice and tight. Now who knows, it may do the same in the TDC position. The smart Yamaha engineers I'm sure had a good reason (sweet spot) regarding utalizing the C position.

[cajun31]

To try to add AI's two cents to this. The C alignment mark is where the cam chain has the most slack. Thinking about the original cam chain adjuster it would make sense so that when the adjustment bolt release was loosened the pad would be released and with the chain being at the most slack point it would allow for the most adjustment. The TDC as we all know is primarily geared for timing etc.. Meaning if the TDC is used instead of the C you would not be getting the maximum adjustment.