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General Category => General Discussion => Topic started by: swooshdave on August 07, 2016, 10:00:21 PM

Title: Upside down Marzocchi Shocks?
Post by: swooshdave on August 07, 2016, 10:00:21 PM
(http://i237.photobucket.com/albums/ff192/swooshdave/850T/A469CCC3-5FE4-45AF-B4EA-66BA8C53F43C_zpsolrzjwwn.jpg)

Could you mount these either way? If you go by the sticker it's probably correct.  :boozing:
Title: Re: Upside down Marzocchis?
Post by: pete roper on August 07, 2016, 10:05:32 PM
In theory, yes, as there isn't an air pocket in the shock body itself, the *air* that is displaced by the rod is in the bladder in the reservoir which simply collapses as the rod enters the shock so there is no emulsification of the oil. I remember when I had a set way back in the day I snapped the reservoir off one somehow but I think that was because I put it on the wrong way round and it buffed against the brake plate, I really can't remember, it was thirty years ago!

They're a pretty horrible shock.

pete
Title: Re: Upside down Marzocchis?
Post by: Muzz on August 07, 2016, 10:36:51 PM
I bet that T cackles with that exhaust Dave. :shocked:
Title: Re: Upside down Marzocchis?
Post by: swooshdave on August 07, 2016, 10:47:55 PM
I bet that T cackles with that exhaust Dave. :shocked:

As soon as my buddy posts a video of us riding we might be able to hear it over his Vincent.  :cheesy:
Title: Re: Upside down Marzocchis?
Post by: Tom on August 08, 2016, 09:19:08 PM
Is the exhaust mounted to the swingarm?  Can't tell from the picture.
Title: Re: Upside down Marzocchis?
Post by: Green1 on August 08, 2016, 09:42:29 PM
When I bought a set of those shocks the sticker was in the box loose and you put it on yourself so my bet would be yes either way and I've see them both ways
Title: Re: Upside down Marzocchis?
Post by: swooshdave on August 08, 2016, 11:26:36 PM
Is the exhaust mounted to the swingarm?  Can't tell from the picture.

No, the rear bolt on the footrest hanger.

You do know you can't mount it to the swing arm...
Title: Re: Upside down Marzocchis?
Post by: Tom on August 08, 2016, 11:37:29 PM
Of course.  The picture isn't that clear.  :wink:
Title: Re: Upside down Marzocchis?
Post by: swooshdave on August 08, 2016, 11:50:48 PM
Of course.  The picture isn't that clear.  :wink:

Some kind of chrome strap. I think the nut is hitting the switch no arm. I have new bolts and thinner nuts that should clear.

I need to pull the mufflers off and put better clamps on. There were some nice clamps in the spares box. Not sure why they weren't used. The right muffler leaks at the muffler joint.
Title: Re: Upside down Marzocchis?
Post by: Tom on August 08, 2016, 11:53:17 PM
The bike is looking good. :thumb:  Have you been able to figure out if the chrome cylinders are on or if they got switched  out for iron liners or something else?
Title: Re: Upside down Marzocchis?
Post by: swooshdave on August 09, 2016, 12:46:35 AM
The bike is looking good. :thumb:  Have you been able to figure out if the chrome cylinders are on or if they got switched  out for iron liners or something else?

Nope. Won't worry about it until this winter when I'll pull off a head.
Title: Re: Upside down Marzocchis?
Post by: fotoguzzi on August 09, 2016, 06:53:22 AM
Nope. Won't worry about it until this winter when I'll pull off a head.
you don't have to pull head, drop sump and put a magnet to the cylinder wall.
Title: Re: Upside down Marzocchis?
Post by: Antietam Classic Cycle on August 09, 2016, 09:28:41 AM
you don't have to pull head, drop sump and put a magnet to the cylinder wall.

You don't even need to drop the sump. Just remove one spark plug, make sure the piston is down away from TDC, insert a pencil magnet and touch the cylinder wall. Easy - 5 minutes and done.

(https://images-na.ssl-images-amazon.com/images/I/21Wm28E1s3L._AC_UL160_SR160,160_.jpg)
Title: Re: Upside down Marzocchis?
Post by: swooshdave on August 09, 2016, 10:16:02 AM
Yes, but that only tells you the material, not the condition of the bore. I'll get a camera in there and see what it looks like.

USB Borescope, Vastar 2.0 Megapixel CMOS HD USB Endoscope Waterproof Handheld Borescope Digital Inspection Camera Snake Camera(5 Meter Cable) https://www.amazon.com/dp/B01HGKMWMA/ref=cm_sw_r_cp_tai_ooFQxbVT75RF2
Title: Re: Upside down Marzocchis?
Post by: Antietam Classic Cycle on August 09, 2016, 11:52:53 AM
Yes, but that only tells you the material, not the condition of the bore. I'll get a camera in there and see what it looks like.

USB Borescope, Vastar 2.0 Megapixel CMOS HD USB Endoscope Waterproof Handheld Borescope Digital Inspection Camera Snake Camera(5 Meter Cable) https://www.amazon.com/dp/B01HGKMWMA/ref=cm_sw_r_cp_tai_ooFQxbVT75RF2

True. But if it's chrome, condition is immaterial. I'll say it again: IMO, there is no such thing as "good chrome bores". If they're chrome, they need to be replaced/replated/sleeved as soon as possible.

If it's Nikasil or iron liners with compression and leakdown numbers within spec. then that pretty much tells you everything you need to know without a borescope or removing a head. 
Title: Re: Upside down Marzocchi Shocks?
Post by: Tom on August 09, 2016, 12:54:40 PM
Hey Dave, that's pretty cool on the bore scope.  I have one that is a seperate hand held unit.  Cost more too.    :embarrassed:
Title: Re: Upside down Marzocchi Shocks?
Post by: swooshdave on August 09, 2016, 04:34:14 PM
Hey Dave, that's pretty cool on the bore scope.  I have one that is a seperate hand held unit.  Cost more too.    :embarrassed:

I bought my dad an Android tablet and a different camera, but he hasn't gotten it to work yet. The one I linked is suppose to work with a laptop too. Obviously at those prices they aren't going to always work.
Title: Re: Upside down Marzocchis?
Post by: swooshdave on August 09, 2016, 04:40:49 PM
True. But if it's chrome, condition is immaterial. I'll say it again: IMO, there is no such thing as "good chrome bores". If they're chrome, they need to be replaced/replated/sleeved as soon as possible.

If it's Nikasil or iron liners with compression and leakdown numbers within spec. then that pretty much tells you everything you need to know without a borescope or removing a head.

Too be honest I'm not sure I'm wed to this bike. With new barrels I'd probably be upside down on this thing, even as cheap as I got it. If someone wants to buy it, spend $10k and make a cafe bike out of it, good for them.

I'll wait for a LeMans before dumping money on a bike. At least there you can get it back out.
Title: Re: Upside down Marzocchi Shocks?
Post by: Tom on August 09, 2016, 04:51:38 PM
Got one of these and yes I know it's Harbor Freight.

http://www.harborfreight.com/catalogsearch/result?q=digital+inspection+camera
Title: Re: Upside down Marzocchi Shocks?
Post by: swooshdave on August 09, 2016, 04:55:36 PM
Got one of these and yes I know it's Harbor Freight.

http://www.harborfreight.com/catalogsearch/result?q=digital+inspection+camera

That's what I was going to get my dad but then I saw I could by a tablet and camera for less and get way higher resolution.
Title: Re: Upside down Marzocchi Shocks?
Post by: Tom on August 09, 2016, 04:58:10 PM
It turns out that sometimes I have to look up and the bore cam that you posted would have to modified to look up.  Not hard but I should have looked around too.  Can't complain, I'm not a professional mechanic. :grin:
Title: Re: Upside down Marzocchi Shocks?
Post by: swooshdave on August 09, 2016, 08:40:46 PM
If I decide to fit LeMans style upswept pipes will I need to flip the shocks?