Author Topic: Making a 1970 'rat rod'  (Read 3593 times)

Offline Lee Davis

  • Guzzi Mentor
  • ****
  • Posts: 258
  • Location: Belen, New Mexico
Making a 1970 'rat rod'
« on: June 19, 2017, 11:16:33 AM »
I have a question about carburetors on a 1970 Ambassador. 


   The bike was parked in Houston in 1985, with the 'cylinders 'oiled up' and the battery removed. It slowly rusted to a not unpleasant patina. My plans are to replace the pistons/cylinders with a new set of Nigisil jugs, add a battery and see if she runs. But, I am unsure about the carbs. What are the thoughts on just running new gas through the carburetors and running it as-is? Do carbs tend to remain ok after years, or should they be rebuilt?
« Last Edit: June 19, 2017, 11:17:00 AM by Lee Davis »
Loopframe rebuilder and Erotic Farmer

Offline Groover

  • 2019 Board Donor
  • Guzzi Hero
  • *
  • *
  • *
  • *
  • Posts: 2667
  • If it ain't broke, I'll break it.
    • Scooteropolis
  • Location: Columbus, Ohio
Re: Making a 1970 'rat rod'
« Reply #1 on: June 19, 2017, 02:03:31 PM »
I would rebuild them if parked for so long. It will probably run without the rebuilt, but you'll likely get backfiring and poor/no idle and such unless you refresh them with new seals and clear the passages for good. The o-rings get brittle and weird oxidation happens inside if left dry for long.

Take them apart and soak them in one of these overnight and they'll be like new (once you replace the wearable parts with a rebuilt kit) - keep the original floats.

https://www.napaonline.com/en/p/MCR6402

« Last Edit: June 19, 2017, 02:05:46 PM by Groover »
1981 Moto Guzzi V1000G5
1987 Moto Guzzi LM1000SE, a
1987 Moto Guzzi LM1000SE, b
1980 Piaggio Vespa P200E
1980 Piaggio Vespa P125X
1980 Vespa Grande Moped
1980 Vespa SI Moped
http://scooteropolis.com/

Offline chuck peterson

  • Guzzi Hero
  • *****
  • *
  • Posts: 4369
  • Location: New Haven CT
Re: Making a 1970 'rat rod'
« Reply #2 on: July 21, 2017, 09:29:07 AM »
Wow, that's a jack pot on the panniers...

CRAVENS...usually black, but I think those are the real deal

Whatever you do save those horns just to PO the purists!
"I'd like to thank all my friends who have kept my Guzzi's going, but mostly...TOMB."
150k on Verts
750 Nevada
400f
R5 Yammie
BV250
4x 1976 Moto Demm Smily,, now 5, oops now 6, oops now 7
1980 SP1000 in little bits and pieces

Offline JoeW

  • Guzzi Hero
  • *****
  • *
  • Posts: 2470
    • The Guzzi Doctor
Re: Making a 1970 'rat rod'
« Reply #3 on: July 28, 2017, 11:14:08 PM »
before you Rebuild the carbs, drop the pan and clean it out, look for chrome flakes or worse, bearing material. If there is no metal in the pan, proceed with cylinders. Do you have the side covers? WD40 and a soft brush will take away that white oxidation, just don't scrub too hard, it'll keep it's patina but not have the barnacles. 
Joe Walano

Wildgoose Chase Moto Guzzi

Re: Making a 1970 'rat rod'
« Reply #3 on: July 28, 2017, 11:14:08 PM »

Offline Chuck in Indiana

  • Guzzi Hero
  • *****
  • *
  • *
  • *
  • *
  • *
  • Posts: 28322
Re: Making a 1970 'rat rod'
« Reply #4 on: August 18, 2017, 03:43:58 PM »
You might be surprised at how well the rusty chrome will clean up with aluminum foil and water. Trust me on this..  :smiley:
Chuck in (Elwood) Indiana/sometimes SoCal

02 Scura RC
87 AeroLario
79 G5
95 Skorpion tour
 
I think senility is going to be a fairly smooth transition for me..

Offline Lee Davis

  • Guzzi Mentor
  • ****
  • Posts: 258
  • Location: Belen, New Mexico
Re: Making a 1970 'rat rod'
« Reply #5 on: September 25, 2017, 07:40:14 PM »
Chuck... I have been scrubbing the original chrome in the cylinder walls with aluminum foil and water for hours and it doesn't seem to help. Any suggestions? I are a smart guy, but this has me trumped.
Loopframe rebuilder and Erotic Farmer

Offline fotoguzzi

  • Guzzi Hero
  • *****
  • *
  • *
  • *
  • *
  • *
  • Posts: 18922
  • vee git tooh soon oldt und too late wise -my Dad
Re: Making a 1970 'rat rod'
« Reply #6 on: September 25, 2017, 07:58:36 PM »
You joke? Chuck was talking about the chrome tear drops on the tank. I think
MINNEAPOLIS, MN

Offline brider

  • Guzzi Hero
  • *****
  • *
  • *
  • *
  • Posts: 1076
Re: Making a 1970 'rat rod'
« Reply #7 on: October 10, 2017, 10:07:01 AM »
Keeping an eye on this thread for activity....I just bought a '70 Ambo myself and I'm eager to not replicate any of Lee's mistakes!  :boozing:
'85 Cal II Auto
'86 LM IV (sold)
'71 Ambo project
Wish'd I'd never sold:
'72 Red Eldo
'74 White Eldo LAPD
'77 Convert with DB bags
'06 Gas Gas EC300

Offline Lee Davis

  • Guzzi Mentor
  • ****
  • Posts: 258
  • Location: Belen, New Mexico
Re: Making a 1970 'rat rod'
« Reply #8 on: October 15, 2017, 01:13:04 PM »
I don't think I have made any mistakes so far, but, of course my ex would say different. Congratulations on the 1970... As I said in another thread, I think it is my favorite year (I have 3 of them). 1970 is also my favorite year for BMWs, and I have two R50/5 bikes. One is a nice running original that I got from the first owner, and the second is a good candidate for a full restoration. My focus right now is pulling out the dents from the 2nd r50 tank. As with the Moto Guzzis, my bugaboo is the painting and pinstriping... I tend to do everything myself, and I am not competent at the pinstriping as yet, but I shall keep practicing. The 1st BMW:


postimage org safe
« Last Edit: October 15, 2017, 01:26:20 PM by Lee Davis »
Loopframe rebuilder and Erotic Farmer

Online Testarossa

  • Guzzi Hero
  • *****
  • *
  • *
  • *
  • *
  • *
  • Posts: 3230
    • Skiing History
  • Location: Paonia, Colorado
Re: Making a 1970 'rat rod'
« Reply #9 on: October 15, 2017, 01:20:37 PM »
Did you clean the carbs? Inspect for flakes in the pan?  Is the bike running?
70 Triumph TR6R, 74 850T, 74 Yamaha TA125, 89 Mille GT, 99 F650
Gone: 59 Piper Comanche 250, 69 Harley/Aermacchi 350SS, 71 Honda CB500/4, 74 Laverda 750 SF2, 91 Suzuki VX800, 50cc two-stroke scoot, 83 XR350R

Offline Rick4003

  • Guzzi Mentor
  • ****
  • Posts: 491
  • Location: Denmark
Re: Making a 1970 'rat rod'
« Reply #10 on: October 19, 2017, 07:01:57 AM »
Hi Lee,

Hoping you're doing good on your project. BUT where are the pictures? We need pictures!  :gotpics:

 :popcorn:

-Ulrik
Moto Guzzi 850 T5 (850 sport) - 1985
Moto Guzzi Ambassador - 1967
Yamaha FZR 600 - 1996 - SOLD

 

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