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Old 03-11-2012, 08:05 PM   #76
Voltaire
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Quote:
Originally Posted by bk brkr baker View Post
Not a Darmah
Differences are .1 The Darmah has body work that looks good from all angles. And the 860 GT of '75 manages to look funky from all angles.
.2 The Darmah has a desmo valve train. The GT has screw and locknut adjusted conventional valve acutation. Not a bad thing in street trim IMHO.

I've had my Darmah for 25 years this year....pinched it from Australia as the boat never stopped at New Zealand ....
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Old 03-11-2012, 08:35 PM   #77
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Babes in bikini's washing a bevel-drive.....moto-porn !
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Old 03-15-2012, 07:31 AM   #78
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After Sunday's big teardown I took a first crack at some engine degreasing and case cleanup last night.



Before:



...and then after a bit of citrus degreaser and scotchbrite pads



Not bad for 10 minutes of work. I still need to go get some some strainless brushes and something acidic to get the stubborn stuff out of the deeper pits, but right now I'm just trying to get the cases clean enough to pull the heads, cylinders and side covers for a deeper inspection and to replace some bad gaskets and seals. The head gasket on the vertical cylinder looks like it was leaking a fair amount of oil due due to all the grunge accumulated on the cooling fins only below the head gasket.



I'll also disassemble the heads to replace all the valve seals. One is VERY torn, so I'm guessing the others aren't far off either. The search continues for someone to sandblast the frame.
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R80ST Gets The HPN Treatment
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Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.

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Old 03-15-2012, 03:33 PM   #79
Precis
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It's a million years since I had one of these apart - do they even HAVE cylinder head gaskets? My single doesn't... just an o-ring on an oil-feed dowel.

Also be wary of acidic cleaners - I got suckered by the labour-saving hype on some "Mag wheel cleaner" - pink snot that permanently stained a Guzzi gearbox casing I was working on.
I can only imagine what would have happened if thet stuff got onto genuine magnesium wheels - a lawsuit at the very least.
So, whatever you try, I suggest you try it first on a small patch somewhere out of sight. And rinse it off & let it dry before you go ahead & smear the whole engine in it.
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Old 03-15-2012, 04:37 PM   #80
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Originally Posted by Precis View Post
do they even HAVE cylinder head gaskets?
Uuuhhhhh. Wow. That never occured to me. That shows how much work I've done on ducatis. I just assumed that anything would have a head gasket, but I went and checked the parts fiche and it shows a base gasket and no head gasket. That's a new one on me.
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R80ST Gets The HPN Treatment
Seattle to TDF on an airhead

Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.
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Old 03-16-2012, 06:28 PM   #81
camgregus
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tight machine work..
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Old 03-17-2012, 06:14 PM   #82
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Quote:
Originally Posted by Airhead Wrangler View Post

Anyone know what this broken sensor in the rear top side of the left side cover is?


I was finally able to break the left side cover loose and answer this question. That plug allows the wires coming off of the stator out through the side cover. The reason it's now vacant I found is that the stator is no longer there. Just plain old gone. The wires going to the ignition triggers are also coming apart really badly. Those'll need replacement as well. The parts list is growing. I also pulled the head and cylinder off the vertical cylinder and found things to be pretty good looking inside. There's still strong crosshatching present in the cylinder, but also some vertical scoring from some carbon particles stuck to the side of the piston. Nothing that I can feel though. I'd say the 8500 indicated km could actually be correct.

Anyone got a source for stators and ignition triggers?

Here's what I found inside:













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R80ST Gets The HPN Treatment
Seattle to TDF on an airhead

Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.

Airhead Wrangler screwed with this post 03-17-2012 at 10:25 PM
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Old 03-18-2012, 09:20 PM   #83
thirsty 1
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That looks really good inside! Good find and it must have been a fun ride picking it up. Looks usable from the pics, no? No head gaskets on them just make sure to find a base gasket the same thickness. measure with a mic and add a couple thousands for the crush. I believe they come in rounded sizes .030.035.040.050 ect..clay the head when you go for assm. and that will give you your pistion to valve clearance. adjust with the clearance with the base gasket. It's been a few years since my last go around with a duc

Here's some good info about that http://www.ducatitech.com/2v/maint/r.../headwork.html

This dudes the shit!!!

Here's my old 944

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Old 03-19-2012, 10:54 AM   #84
240sx4u
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Great thread, that dog is too cute.
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Old 03-20-2012, 10:17 AM   #85
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I've read mention of cleaning out some sludge traps on the crank, but couldn't find any specific procedure anywhere. I have both barrels off and the pistons removed, so I might as well do it while I'm in this deep as I'm sure all the metal sludge from break-in is still probably in there. Can anyone point me to a procedure somewhere? Is this even possible to do without splitting the cases and removing the crank?
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R80ST Gets The HPN Treatment
Seattle to TDF on an airhead

Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.

Airhead Wrangler screwed with this post 03-20-2012 at 10:33 AM
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Old 03-20-2012, 12:31 PM   #86
thirsty 1
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Quote:
Originally Posted by Airhead Wrangler View Post
I've read mention of cleaning out some sludge traps on the crank, but couldn't find any specific procedure anywhere. I have both barrels off and the pistons removed, so I might as well do it while I'm in this deep as I'm sure all the metal sludge from break-in is still probably in there. Can anyone point me to a procedure somewhere? Is this even possible to do without splitting the cases and removing the crank?

I/ve pulled all the plugs out of other engines and rinsed them with clean diesel fuel. repeat repeat repeat. Don't know if that helps but will make a mess.

Edit: when it's all together crank with spark plugs off till you get oil pressure.

thirsty 1 screwed with this post 03-20-2012 at 08:48 PM
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Old 03-28-2012, 08:31 AM   #87
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Alright, while the frame is stripped I'll try taking it into the local transito office and see if I can beg my way into plating it. In the meantime I've been searching for a direction to take this thing. Here are a few that I like:















I'm leaning toward something naked. Shipping fairings to mexico gets pretty pricey (not that the rest of it isn't).
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R80ST Gets The HPN Treatment
Seattle to TDF on an airhead

Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.
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Old 03-28-2012, 04:56 PM   #88
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Neat project.

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Old 04-07-2012, 12:39 PM   #89
GoinPostal
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Quote:
Originally Posted by Airhead Wrangler View Post
Alright, while the frame is stripped I'll try taking it into the local transito office and see if I can beg my way into plating it. In the meantime I've been searching for a direction to take this thing. Here are a few that I like:




I'm leaning toward something naked. Shipping fairings to mexico gets pretty pricey (not that the rest of it isn't).
This would be my choice. Finally a project to keep you busy after mine is out of your yard. Remember, if you need anything from Northern California, just let me know, I'll help where I can
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Old 04-08-2012, 08:39 AM   #90
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Anybody know what the openning rocker clearances are supposed to be for Pantahs? The PDF of the shop manual that's floating around says zero. That doesn't sound right. I know the closing rockers are supposed to be zero, but able to spin the collar shim while pushing down on the rocker. The openning cap shims are way too loose, but I'm not sure what the spec is. It can't be zero though... can it?
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R80ST Gets The HPN Treatment
Seattle to TDF on an airhead

Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.
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