Author Topic: Mamma Mia! 850 T3  (Read 1618 times)

Offline Stu

  • New Goose
  • *
  • Posts: 28
Re: Mamma Mia! 850 T3
« Reply #30 on: May 23, 2020, 03:29:22 PM »








So, while none of my T3 is pretty, one real eyesore for me was the red shocks. Yes, I know they're iconic aftermarket Marzocchis but they're tatty and the red doesn't match anything.

Took them off this morning, took them apart (cable tie spring compressors... if it works don't knock it), stripped off all the loose paint and corrosion, gave the bodies a coat of primer and satin black, cleaned up the collars, and reassembled them...

Good news is they both work perfectly, don't leak and have great damping in both directions.

Can't refit them, need a set of new bushes...

« Last Edit: May 23, 2020, 04:39:52 PM by Stu »

Offline berniebee

  • 2020 Board Donor
  • Weekend Warrior
  • *
  • Posts: 147
  • Location: Ottawa, Canada
Re: Mamma Mia! 850 T3
« Reply #31 on: May 24, 2020, 03:56:31 PM »
The shocks look 107.5 % better now! 

Offline Klinkhammer

  • New Goose
  • *
  • Posts: 24
  • Location: Stockholm, Sweden
Re: Mamma Mia! 850 T3
« Reply #32 on: May 25, 2020, 01:41:09 PM »
Very nice.
Inspiring!
V7 sport 1972
850T Endurance racer lookalike 1974
LM III 998 Agostini 1983

Offline Stu

  • New Goose
  • *
  • Posts: 28
Re: Mamma Mia! 850 T3
« Reply #33 on: June 01, 2020, 02:46:39 AM »
Spent a chunk of change Friday ordering some of the bits to do the exhaust (stainless clamps – mine are horribly rusty and mismatched), Brakes (new innards for master cylinders and seals for calipers, bleed nipples, etc.), carbs (rebuild kits), front tank rubbers (mine are perished) and a new ignition switch (again, don’t F it up). All told, about £300’s worth. Bloody scary for a few little bits, but it’ll give me some stuff to be getting on with. Probably should add a new set of brake pipes… it already has braided hoses all over, but the fittings are rusty… no, keep reminding me this isn’t a resto.

Started on the exhaust Friday. Managed to get both silencers off easily enough with a bit of soaking in WD40. Took headers and crossover off the bike complete. Left header came off with a bit of effort, right is putting up a hell of a fight. I left it soaking overnight to no effect – blowtorch next! De-rusted them with a pot scourer… chrome is dulled where it still existed, but more consistent overall and at least 95% of the rust is gone. Lots of pitting. I now understand why exhaust wrap has become a fashion… would cover a multitude of sins! Will leave as is for now…

Fought the shocks back on Saturday, another comedy of errors… and still wrong. The reason I damaged one of the bushes taking it off is because the mounting pins on the frame are oversize. Someone’s plated the frame at some point, and three out of four of the pins are plated and about 0.3mm over the nominal 14mm. The one on the final drive which obviously didn’t go to the platers is 13.95mm and fine! Anyway… the shocks are on… a lot of filing and sanding, three original bushes and one bodged from a thin sleeve bearing bush and a smaller OD shock bush. For now it's tight and solid! From past experience, 30 year old shocks will die pretty soon after being forced back into use, so I’ll sort it all out when needs must.

Keep reminding myself of the plan… get it back on the road, useable and reliable. And don’t worry too much about what it looks like for now.

Is it a coincidence that I just reopened this and an advert for header wrap appeared? Maybe it's destiny...  :wink:

Oh, and this arrived...



« Last Edit: June 01, 2020, 03:10:48 AM by Stu »

Wildgoose Chase Moto Guzzi

Re: Mamma Mia! 850 T3
« Reply #33 on: June 01, 2020, 02:46:39 AM »

Offline rutgery

  • Sunday Rider
  • **
  • Posts: 98
  • The Netherlands
Re: Mamma Mia! 850 T3
« Reply #34 on: June 03, 2020, 03:28:36 AM »
Nice work on the bike, new brake caliper components will definitely do it some good. It's hard to see from the picture, but your calipers are the twin bleed type with chrome pistons right? Are you upgrading to the alu brake pistons? I don't know the quality of the marzocchi shocks but the original koni ones regularly used on old tonti frames seem to be almost indistructable unless seriously neglected. Your's might be as well. At least they look much nicer now!

Looking forward to your progress! Also, you guys have way nicer licence plates than in europe (or the Netherlands at least). I think these will look very nice on the bike.  :thumb:
'82 Moto Guzzi G5
'89 V7 Sport replica from a Cali 3
'67 V7 700 #181 from the production line

Offline Stu

  • New Goose
  • *
  • Posts: 28
Re: Mamma Mia! 850 T3
« Reply #35 on: June 03, 2020, 09:05:06 AM »
Thanks... parcel just arrived with caliper seals... still a couple more to come from all over EU. Yes, twin bleed type. Haven't ordered pistons at this point... will have a look at them first.

Had Marzocchis on my old Ducati. They were working perfectly well one day and seized and bent the next! They feel perfect at the moment, so who knows.

License plate is an old style one - only for "historic" vehicles over 40 years old.  Standard ones are reflective yellow and not pretty!

Offline berniebee

  • 2020 Board Donor
  • Weekend Warrior
  • *
  • Posts: 147
  • Location: Ottawa, Canada
Re: Mamma Mia! 850 T3
« Reply #36 on: June 03, 2020, 04:33:00 PM »
Coming along!  :thumb:
I share your (fiscal) pain. I ordered a few parts for my SP1000, it was a rather large sum for a pretty small box of parts.

If the brake pads aren't separating from the metal backing plate, it's probably fine to reuse them. BTW, on my bike the rear caliper (F09) has plain steel pistons which were rusty and needed replacement, but the two front sets  (F08) are coated and in perfect condition. I will order new caliper kits and MC kits too -eventually. I need to let my credit card cool down!

Just curious, how does a vintage license plate work in England? Does a vintage plate restrict where and how often you can ride? We have historic plates available in the province of Ontario (Every one of the Canadian provinces have their own plates and rules.) and they are much less expensive than regular plates. But the restrictions on where and when one can ride  with historic plates makes them useless for someone who wants to ride the bike regularly. They are intended for people who ride seldomly and then only to specific exhibitions, events, parades, etc.

Offline Stu

  • New Goose
  • *
  • Posts: 28
Re: Mamma Mia! 850 T3
« Reply #37 on: June 04, 2020, 02:22:10 AM »
Bike already has three sets of new EBC pads, fitted by seller, so no problems there!

Historic registration seems to be all advantages... no road tax, no annual MoT test, no restrictions (as far as I am aware). Plate is purely cosmetic... I could fit the standard yellow one if I wanted and no one would know the difference. Only vehicles over 40 years and registered as historic are allowed to wear the old style black and white plates, so they're pretty rare on the road.

Offline Stu

  • New Goose
  • *
  • Posts: 28
Re: Mamma Mia! 850 T3
« Reply #38 on: June 22, 2020, 05:46:16 AM »
Bit of an update... much has gone on since I was last here.

Started cleaning things up a bit and am pleasantly surprised how well it's scrubbing up. There are no plans to make anything as-new, but the Borranis, final drive and engine cases are responding well to a bit of a deep clean and the exhausts now look suitably used but solid. Biggest surprise was the nickel plated frame, which cleans up nicely, and looks suitably shiny. Jury's out on whether it's staying in the long term, but it's presentable for now.

I've removed a few of the PO's 'orrible black bits... his attitude to anything slightly dodgy seems to have been cover it with thick gooey black paint. The crash bars got removed and parked under the bench. The seat grab rail would have too, except that the seat hinges on it, so I managed to buy a reasonable chrome one and it's been replaced. Footrest hangers came off and got a coat from a silver aerosol. Two bits left that need attention; the rear light bracket (needs replacing with a half decent chrome one) and the fork sliders which shouldn't be impossible to clean up when I get to the front end. Oh, and it needs some new horns... the Voxbells are a) horrible, b) painted black, and c) silent.

The other nasty black bits were the tank and side panels… which are currently baking in the sun outside having been stripped and resprayed over the course of the last ten days. They're looking rather good, despite my cheapskate addiction to Halfords rattle cans, somewhat closer to original (although not completely so), and much less depressing. No photos yet, I'll wait till it's reassembled. You'll have to wait a week or so as I'm letting the paint harden properly and need to rebuild the front master cylinder (and caliper) so it no longer drips brake fluid onto the tank!

Spoiler... having just got my V5 back with "Historic Vehicle" on it, I've now got to send it back again to change the colour.

Offline Stu

  • New Goose
  • *
  • Posts: 28
Re: Mamma Mia! 850 T3
« Reply #39 on: June 23, 2020, 03:28:14 AM »
As promised, front caliper and master cylinder came apart last night. Who decided at the factory to use a master cylinder that needs to be slid off the bars and requires removal of throttle and switchgear?  Stuff that... I rebuilt it in place on the bars! One buggerance… it's been broken and welded at some point where the lever attaches, which has left the entrance to the bore somewhat obscured by the weld. The cylinder itself is OK, but sliding the washer and locking ring into position from the open end was impossible (the fitted ones were severely bent out of shape by a PO hammering them in - animal!). Some intervention with small round file on the weld cleared the path and all went back together fine. It's all good in terms of operation, but I may be tempted to replace it, especially if it still has a tendency to drip! Cap and seal will be renewed; I think that's where it was leaking from.

Caliper was also stripped and new seals put in... I think the whole operation was a bit pointless; it has nice new Teflon pistons in and the seals were soft and probably recently replaced during the PO's minor resurrection. Anyway, all done and I know what's in there now. Tonight's job  - new fluid and get it bled.   

I haven't found the courage to start on the linked system yet, but I need to - the dust seals on those calipers basically fell out when I popped the pads out.

Offline rutgery

  • Sunday Rider
  • **
  • Posts: 98
  • The Netherlands
Re: Mamma Mia! 850 T3
« Reply #40 on: June 23, 2020, 04:45:06 AM »
Hey Stu, nice to see you continuing the improvements to the bike! I'm very curious to how the painting turned out. With proper preperations you can get very nice results. Did you apply the decals and/or emblems back onto the covers and tank?

It's always sad to see that you're in the process of replacing something that wasn't necesary, I had the same experience checking the distribution chain tensioner in my G5 which was apparently already replaced by the previous owner :rolleyes: Don't worry about starting on the linked system, it really isn't that big of a deal. Only the bleeding can be a bit of a chore but a little help from someone else can go a long way. pressuring the system overnight to bleed also works wonders.

I'm looking forward to the pictures! :gotpics:
'82 Moto Guzzi G5
'89 V7 Sport replica from a Cali 3
'67 V7 700 #181 from the production line

Offline Stu

  • New Goose
  • *
  • Posts: 28
Re: Mamma Mia! 850 T3
« Reply #41 on: June 23, 2020, 05:17:50 AM »




Only the bleeding can be a bit of a chore

It's only the bleeding I'm worried about!

Quote
I'm looking forward to the pictures!

Did you apply the decals and/or emblems back onto the covers and tank?

 Well, since you ask nicely... here's a spoiler... Tank obviously not sitting quite right, but I couldn't resist popping them on for two seconds last night to have a look...  I have to sort the seat out - the base is a bit mangled and was scratching the back of the tank before.
« Last Edit: June 23, 2020, 05:42:01 AM by Stu »

Offline Stu

  • New Goose
  • *
  • Posts: 28
Re: Mamma Mia! 850 T3
« Reply #42 on: June 25, 2020, 02:13:09 AM »
So, the front brake was a bit of a nightmare... bought new seal kits from Gutsibits which were pattern parts, not Brembo. As I said above, the caliper already seemed to have good bits in, but I swapped them for the new pattern parts to be sure. I spent an hour or so trying to bleed it, and eventually got some pressure, at which point fluid started pissing past one of the new piston seals in the caliper.  :sad: Stripped it again last night, replaced all the seals with the "good" ones I'd taken out and it has bled up nicely and is not leaking. Now to have a discussion with Gutsibits. I have two more sets of those seals to go in the linked system, and the last thing I want to do is do it more than once. I've never, ever had a problem with pattern seals before... they've always worked perfectly. Had to be a first time, I suppose  :rolleyes:

The next job... try to turn this into a seat  :shocked:







« Last Edit: June 25, 2020, 04:52:05 AM by Stu »

Offline rutgery

  • Sunday Rider
  • **
  • Posts: 98
  • The Netherlands
Re: Mamma Mia! 850 T3
« Reply #43 on: June 25, 2020, 02:38:10 PM »
That paintwork is looking nice :thumb: Too bad about the brake caliper seals.. Luckely you have working ones and don't have to wait for a new order to come in.

What's that about the seat, that looks fine to me, nice and comfy :evil:
Were you able to source a new seat cover or are you going to reuse the one that was on it when you bought the bike? It might be different in the US but in Europe these seats seem to have disappeared, making finding replacement seats or even covers very hard.. My G5 seat pan looked like that as well but I've replaced it with a Stucci plastic pan with the original foam on top and a new seat cover, might be something to consider if these are available second hand.

Here's a picture of my ''as good as new'' original seat pan;


'82 Moto Guzzi G5
'89 V7 Sport replica from a Cali 3
'67 V7 700 #181 from the production line

Offline Stu

  • New Goose
  • *
  • Posts: 28
Re: Mamma Mia! 850 T3
« Reply #44 on: June 25, 2020, 03:05:17 PM »
Happy with paint. Not the easiest one I’ve ever done, but turned out ok eventually.

Pan is pretty solid. The seat is a sofa off a SP/G5/convert and not what I want. I’ve managed to buy a nice moulded seat cover for a T3 from “old school covers” on eBay. Hopefully the foam will cut down to accept the new narrower cover. If not, there are new foams on eBay too.

***Wildguzzi Official Logo High Quality 5 Color Window Decals Back In Stock***
Shipping in USA Only. Awesome quality. Back by popular demand. All proceeds go back into the forum.
http://www.wildguzzi.com/Products/products.htm
Advertise Here
 

20 Ounce Stainless Steel Double Insulated Tumbler with donation credit
Buy a quality tumbler and support the forum at the same time!
Better than a YETI! BPA and Lead free.
Advertise Here