Author Topic: #7 joins the fleet  (Read 9732 times)

MikeScoot

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Re: #7 joins the fleet
« Reply #100 on: October 19, 2020, 03:55:54 PM »
The idea is that as the clamp is tightened the space occupied by the gasket reduces, thereby forcing the gasket material hard against the surfaces that constrain/contain it. A couple of exhaust fellas explained to me that this system is the very best for getting a very tight exhaust gas seal - but I think it assumes the correct gasket being used. Filling the volume around the gasket with high-temp silicone and leaving the assembled pieces only "finger tight" till the silicone sets a bit, then tightening a bit more, then leaving a while before a final tightening seems to have workd for me - BUT I haven't taken th bike for a long run yet as other things have come up.

Good luck with it! Those gaskets you bought may not be a waste at all!
Luther had his dream,
But I've got my Vision.
His got him into strife,
Mine just takes me fishin'.

Prophet Of Doom

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Re: #7 joins the fleet
« Reply #101 on: October 22, 2020, 03:43:18 AM »
Some more progress.  All the pipes are connected, and wiring as well.
Very pleasingly everything worked first time - a testament to the virtues of fanatical cleaning.


MikeScoot

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Re: #7 joins the fleet
« Reply #102 on: October 22, 2020, 05:23:45 AM »
ExZellent!

I've been having a bit of a clean around here too, but not quite the required fanatical type yet. I've got XZ leftovers EVERYWHERE and more half-expired spray cans than you could poke a stick at! Funny about that 'cos I'm seriously thinking of stripping all the paint I did (which took a good few months and sheetloads of bucks) to do and giving it another simple job in two-pac.
Acrylic really sucks!

Hope you're enjoying the summer there!
Luther had his dream,
But I've got my Vision.
His got him into strife,
Mine just takes me fishin'.

fret not

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Re: #7 joins the fleet
« Reply #103 on: October 22, 2020, 10:42:24 PM »
Oh my!  That is a vision to behold!  Lights!  It causes me to consider my project and when I might see the lights come on.  For me it will be like stumbling onto a derelict space ship in some remote and desolate place and to find there IS life in the old system after all.  It's magic. :)
Retired, on the downhill slide. . . . . . . . still feels like going uphill!

Prophet Of Doom

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Re: #7 joins the fleet
« Reply #104 on: October 24, 2020, 04:32:35 AM »
I took a closer look at the Y-piece.  To the aging naked eye it looks fine, but it's actually fairly eroded around the copper o-ring.  Hence the sloppy ring.
I've painted it with hardening type exhaust gasket goop.  I'll let it harden and cure, then file it.  Lets see if that takes out the o-ring slop.

fret not

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Re: #7 joins the fleet
« Reply #105 on: October 24, 2020, 03:27:36 PM »
Looks like peanut butter putty.
Retired, on the downhill slide. . . . . . . . still feels like going uphill!

Prophet Of Doom

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Re: #7 joins the fleet
« Reply #106 on: October 25, 2020, 05:15:16 AM »
The rings are now a tight press fit.  Not sure if it will hold up, it's pretty fragile.

Prophet Of Doom

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Re: #7 joins the fleet
« Reply #107 on: November 07, 2020, 04:33:29 AM »
Well it didn't hold up.  A complete fail.  I ended up taking it all off with a wire brush.

I have a small (disposable tanks) Oxy/Propane torch, so brazed a layer of silicon bronze to fill the flame cutting.  The Y-pipe is a bit heavy for this tiny torch - it only just managed to get the pipe hot enough to melt the bronze.

The Y-pipe seems solid enough now.  I still think a decent flange would have been more sensible Mr Yamaha.  I forgot to take a pic of the Y-pipe, and it's too late now.

MikeScoot

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Re: #7 joins the fleet
« Reply #108 on: November 07, 2020, 07:56:39 AM »
Can't see much at all of that pesky "Y-piece" in that pic, but what I do see looks very nice indeed!
I think the trick with the "Y-piece' is to have enough material inside the cavity of the clamps (and at the right viscosity or size) so that when the clamps are tightened they force the material hard against the pipe attached to the head.
The arrangement is a prime feck-up - from a serviceability point of view!
Luther had his dream,
But I've got my Vision.
His got him into strife,
Mine just takes me fishin'.

Prophet Of Doom

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Re: #7 joins the fleet
« Reply #109 on: November 07, 2020, 11:19:44 PM »
Bled my brakes today to make the bike safer to take down from the lift. 
I am reminded that the bleeding procedure outlined in Haynes and the Yamaha service manual is OK for fluid changes, but does not work well if you have new empty lines and calipers.

The process I use is to pump it up from the bottom with a syringe.    This one's a bit small but all I could find on a Saturday.
When re-loading the syringe, you need to pull back a bit to get any bubbles out before pumping.  Go slowly else the fluid comes out the master cylinder like a fountain.

Love my Hell braided stainless lines.  Lever action is solid as a rock.

Prophet Of Doom

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Re: #7 joins the fleet
« Reply #110 on: November 14, 2020, 04:33:12 AM »
Hmmm, that's not a good sign.

fret not

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Re: #7 joins the fleet
« Reply #111 on: November 14, 2020, 02:00:02 PM »
Rohan, did the O ring fail?
Retired, on the downhill slide. . . . . . . . still feels like going uphill!

vintage bikeworks

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Re: #7 joins the fleet
« Reply #112 on: November 14, 2020, 05:14:58 PM »
Hmmm, that's not a good sign.
Is that engine coolant?  Not from the water pump cover o-ring I hope? 
1982 Yamaha XZ550 Vision
2002 Yamaha FZ1
1978 Honda CB400TII Hawk
2018 Yamaha FJR1300

Prophet Of Doom

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Re: #7 joins the fleet
« Reply #113 on: November 14, 2020, 06:02:09 PM »
Hmmm, that's not a good sign.
Is that engine coolant?  Not from the water pump cover o-ring I hope? 
No but that would be an easy fix.  It's coolant coming from the head gasket.
New gasket, clean surfaces and properly torqued to spec. 


Warpage, piece of debris, a crack? Won't know till I drop the engine and crack it open.  Again.  Sigh!


fret not

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Re: #7 joins the fleet
« Reply #114 on: November 14, 2020, 08:13:30 PM »
Things like this teach us about patience.  Has this motor been run since you installed the head gasket? 
Retired, on the downhill slide. . . . . . . . still feels like going uphill!

MikeScoot

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Re: #7 joins the fleet
« Reply #115 on: November 15, 2020, 04:57:43 AM »
Don't race into pulling the mill down too quickly. Coolant circulates independnt of the combustion components. It could be a simple small crack somewhere or those pesky tubes from the pump to the motor.
Leave it alone for a day or so and have a good think, mate. There may well be a very easy fix.
Luther had his dream,
But I've got my Vision.
His got him into strife,
Mine just takes me fishin'.