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Author Topic: '82 Moto Guzzi v50 Rebuild/Redesign  (Read 57908 times)

Offline zachattach

  • Posts: 87
  • Project Doldrums
    • http://www.dotheton.com/forum/index.php?PHPSESSID=549k0ng455dkkuv2ks89nhp6s7&topic=32322.0
Re: '82 Moto Guzzi v50 Rebuild/Redesign
« Reply #20 on: Jan 28, 2012, 20:40:03 »
After looking at the block on the stand for a few days I decided I really need to see what was inside.  I really wanted to get to the very bottom of things to make sure I'm sinking all of this labor into something that will run for years to come.  So, I apprehensively started unbolting, and didn't stop until well, there was nothing left disconnect (With the exception of separating the pistons from the con rods.  Don't see any need for this).

It's amazing how many pieces that block explodes into.  The pic actually only has about half of them laid out on the cardboard.  I've never been this deep into an engine before, and I was kind of worried that I was going to do something irreversibly stupid.  Luckily I've found a few good local advisors to help prevent this.  Curtis, from TechShop, knows the larger Guzzis backwards and forwards (as well as anything else with a mechanical basis) and has been my go to guy on most matters.  When I need small block Guzzi specific knowledge and Ed Milich of Guzzi Tech is the go to guy.  Ed has been building and racing small block Guzzis for years, and has a host of custom parts for them.  I've turned over my bike's (pile of parts) clutch and flywheel to Ed to get a little love (http://www.guzzitech.com/store/Flywheellightening.html).

As I began the block disassembly I ordered some parts in advance.  I picked up the last set of rings that MG cycle had for a v50 and a complete gasket kit.  Now that I've dug deeper, I'm going to need to track down a few more bearings and seals before I can put the block back together.  I'll do posts on the minor signs of wear I've uncovered individually.

The best news of this exercise is that all of the core pieces of the power plant are solid.  This bike is going to make a fine little runner.


Offline 50gary

  • Posts: 593
  • Under the Limelight
Re: '82 Moto Guzzi v50 Rebuild/Redesign
« Reply #21 on: Jan 29, 2012, 00:16:06 »
Very nice and we all love the Moto Guzzi.  Thanks for the link to the BMW Motorrad video also very nice.  I (partially) bought a Honda CX500 because I couldn't find a Guzzi I could afford, you did well, especially in a city like San Francisco.
  Cheers, 50gary
Short track speedskating, cycling, guitars, motorcycles, juggling dynamite. I was born to laugh at Tornadoes.

Offline gentlemanjim

  • Posts: 136
Re: '82 Moto Guzzi v50 Rebuild/Redesign
« Reply #22 on: Jan 29, 2012, 04:02:01 »
These are great little bikes.  I did this one awhile back.  They will Do the Ton!




Here's a link to my build may give you some insite.  Going to follow your progress

http://wildguzzi.com/forum/index.php?topic=26896.msg407105#msg407105


Great source of info on this forum

http://wildguzzi.com/forum/index.php?board=1.0


Chao

 
"More Wrenching than Riding"

Offline Dale

  • Posts: 680
    • [B]Moto Guzzi V50II Detailed Cafe Build Diary [/B]
Re: '82 Moto Guzzi v50 Rebuild/Redesign
« Reply #23 on: Feb 02, 2012, 18:43:02 »
Hey there, cool to see another V50! Whats the latest?

Dale

Offline zachattach

  • Posts: 87
  • Project Doldrums
    • http://www.dotheton.com/forum/index.php?PHPSESSID=549k0ng455dkkuv2ks89nhp6s7&topic=32322.0
Re: '82 Moto Guzzi v50 Rebuild/Redesign
« Reply #24 on: Feb 08, 2012, 03:17:46 »
All right,
here's the breakdown of the good, the bad, and the ugly of the engine internals:

The Good (but seen better days):
Front and rear main "half bearings" are worn.  Nothing terrible, but time to replace.
"Half washers"  these are in decent shape.  It would be nice to replace them, but I'm not sure I'll be able to locate a set.  If anyone has any leads please let me know.

The Bad:
Con rod half bearings show signs of particulate oil contamination.  Those cavities are the result of the soft babbitt bearings saving the crank shaft from scoring resultant from whatever worked itself in there.

The Ugly:
The engine temp sensors on these bikes actually hold the cam in position by inserting (or it is/was supposed to) into a whole on the (yes there is only one) cam shaft bearing.  At some point somebody loosened the sensor and cranked it back in totally crushing the bearing.  Amazingly, despite it's destroyed state the bearing continued to do its job until I got to it.  There's no damage to the cam.  This piece is never going back in going to be really hard to replace.

To address the above items, I currently have con rod bearings coming in from Stein Dinse in Germany and a list of parts that MG cycles is sourcing for me from who knows where.  The only outstanding parts needs I have for the engine internals are the half washers and the cam bearing.

Additionally, I have walnut shell, glass bead, and soda blasting material arriving shortly.  The drive train of this bike is going to be fresh inside and out.




Offline sidedraft36

  • Posts: 6
  • Sceptically Optimistic Pragmatist
Re: '82 Moto Guzzi v50 Rebuild/Redesign
« Reply #25 on: Feb 08, 2012, 05:54:06 »
Zachattach,

Rebuilt a V-65 motor some years back. They are nice little engines.

But, I'm amazed that you can't get thrust washers? They are still making variants of that motor. Aprillia use it in their Guzzi V-7 retro-bikes.

Good luck with your project.

SD
1977 Moto Guzzi 850 LeMans

"Did you think that you would enter the Garden of Bliss without enduring the trials of those that have gone before you?"

Offline manolon6

  • Posts: 67
Re: '82 Moto Guzzi v50 Rebuild/Redesign
« Reply #26 on: Feb 08, 2012, 06:34:37 »
Hi Zachattach
Take a look at this spanish forum
Itīs a v35 not v50 but I think it could be a good inspiration...

http://pruebaweb.clubcaferacer.net/foro/viewtopic.php?f=7&t=1483&sid=3537cc862648a67ab202657d1b29035d

Offline Dale

  • Posts: 680
    • [B]Moto Guzzi V50II Detailed Cafe Build Diary [/B]
Re: '82 Moto Guzzi v50 Rebuild/Redesign
« Reply #27 on: Feb 08, 2012, 10:43:34 »
Itīs a v35 not v50 but I think it could be a good inspiration...
http://pruebaweb.clubcaferacer.net/foro/viewtopic.php?f=7&t=1483&sid=3537cc862648a67ab202657d1b29035d

The second pic is his "Intenciones". Its a LeMans. But a VERY nice one, and most definitely great inspiration, although its would be pretty difficulty to get the "bulky" look into the little V35.

Zachattach, I also had to replace those pesky big ends etc. MGcycle in Wisconsin have one or two sets left if you're stuck for parts... In fact, they've got a bunch of cool stuff on their site that you might want to check out if you haven't already. Its all looking good, and I admire the way you're plunging in there. Good luck.

www.mgcycle.com


Offline crema

  • Posts: 4
  • In over my head
Re: '82 Moto Guzzi v50 Rebuild/Redesign
« Reply #28 on: Feb 08, 2012, 14:15:04 »
Way back to your question about the floating rear/inner fender, cafePete did that on his CB360 build.  I think it looks great and was planning on doing something like that myself.  Here's a link http://www.dotheton.com/forum/index.php?topic=10532.210

Offline 50gary

  • Posts: 593
  • Under the Limelight
Re: '82 Moto Guzzi v50 Rebuild/Redesign
« Reply #29 on: Feb 08, 2012, 16:27:44 »
Floating rear fender, That's basically what a Sportbike "hugger" is.   I think it's a fine idea if it's not too heavy as it does add some to the unsprung weight of the rear suspension.
  Cheers, 50gary
Short track speedskating, cycling, guitars, motorcycles, juggling dynamite. I was born to laugh at Tornadoes.