Stuck in the '70's
#1
Thread Starter
Senior Member


Joined: Sep 2009
Posts: 830
Likes: 355
Stuck in the '70's
Thought I'd post a couple of photos of two of my 1970's bikes. The Motobecane came to me recently (thanks Lynn!) from a Forum member. It was recently seen in a thread over in the Valuation side of things, and I just finished up the reassemble. It is a 1975; original but for the Avocet triple crank and Specialized wheels. The second bike is a Centurion Semi-Pro (again a 1975); mostly original with the exception of a long cage Cyclone rear derailleur that i installed in order to handle the new wider range freewheel. Super happy with both!



Last edited by orcas island; 04-10-16 at 07:52 PM.
#6
Thread Starter
Senior Member


Joined: Sep 2009
Posts: 830
Likes: 355
#7
Extraordinary Magnitude


Joined: Aug 2009
Posts: 14,087
Likes: 2,146
From: Waukesha WI
Bikes: 1978 Trek TX700; 1978/79 Trek 736; 1984 Specialized Stumpjumper Sport; 1984 Schwinn Voyageur SP; 1985 Trek 620; 1985 Trek 720; 1986 Trek 400 Elance; 1987 Schwinn High Sierra; 1990 Miyata 1000LT
What is that rear derailleur and the chainrings on the Motobecane?
Those are both beautiful bikes- congratulations!
Those are both beautiful bikes- congratulations!
__________________
*Recipient of the 2006 Time Magazine "Person Of The Year" Award*
Commence to jigglin’ huh?!?!
"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
Commence to jigglin’ huh?!?!
"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
#9
Bike Butcher of Portland


Joined: Jul 2014
Posts: 12,493
Likes: 8,060
From: Portland, OR
Bikes: It's complicated.
Outstanding examples to add to your collection!
__________________
If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.
If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.
#10
Extraordinary Magnitude


Joined: Aug 2009
Posts: 14,087
Likes: 2,146
From: Waukesha WI
Bikes: 1978 Trek TX700; 1978/79 Trek 736; 1984 Specialized Stumpjumper Sport; 1984 Schwinn Voyageur SP; 1985 Trek 620; 1985 Trek 720; 1986 Trek 400 Elance; 1987 Schwinn High Sierra; 1990 Miyata 1000LT
Ahh! Thanks!
It looks cool and funky. Aren't the Jubiliees supposed to be the lightest production derailleurs ever made?
It looks cool and funky. Aren't the Jubiliees supposed to be the lightest production derailleurs ever made?
__________________
*Recipient of the 2006 Time Magazine "Person Of The Year" Award*
Commence to jigglin’ huh?!?!
"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
Commence to jigglin’ huh?!?!
"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
#11
Thread Starter
Senior Member


Joined: Sep 2009
Posts: 830
Likes: 355
#12
Senior Member




Joined: Dec 2004
Posts: 15,427
Likes: 8,346
From: Seattle area
Bikes: Bikes??? Thought this was social media?!?
I will also chime in on the beauty of each. Shiny old bikes bring a smile of satisfaction. Well done.
I need to come your way before the summer rush - where do you ride most often? Triples, eh?
I need to come your way before the summer rush - where do you ride most often? Triples, eh?
__________________
Vintage, modern, e-road. It is a big cycling universe.
Vintage, modern, e-road. It is a big cycling universe.
#15
Extraordinary Magnitude


Joined: Aug 2009
Posts: 14,087
Likes: 2,146
From: Waukesha WI
Bikes: 1978 Trek TX700; 1978/79 Trek 736; 1984 Specialized Stumpjumper Sport; 1984 Schwinn Voyageur SP; 1985 Trek 620; 1985 Trek 720; 1986 Trek 400 Elance; 1987 Schwinn High Sierra; 1990 Miyata 1000LT
I have an Avocet triple. I removed the Avocet chainrings and replaced them with drilled RINO rings- (and a Campagnolo 28). I've been 'warned' that the Avocet/Ofmega crankset is prone to cracking around the pedal holes; as such- it might be a good idea to inspect the arms once in a while.
I've also been told that the Avocet/Ofmega crank is one of the lightest production cranks ever made. It's not something I seek out- just mentally file that stuff away when I hear it.
Here's the Avocet with the stock rings, the anodized RINO rings above- and compared to a Stronglight 99BIS. I really wanted to trade drilled rings with someone that wanted red anodized rings..

The Avocet with the stripped rings and after polishing- still with the Avocet 24 granny:

And the Avocet on my Trek 400- still with the Avocet 24 ring. I get such a stupid kick out of having top of the line parts on a 'next to entry level' bike.
__________________
*Recipient of the 2006 Time Magazine "Person Of The Year" Award*
Commence to jigglin’ huh?!?!
"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
Commence to jigglin’ huh?!?!
"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
#17
Extraordinary Magnitude


Joined: Aug 2009
Posts: 14,087
Likes: 2,146
From: Waukesha WI
Bikes: 1978 Trek TX700; 1978/79 Trek 736; 1984 Specialized Stumpjumper Sport; 1984 Schwinn Voyageur SP; 1985 Trek 620; 1985 Trek 720; 1986 Trek 400 Elance; 1987 Schwinn High Sierra; 1990 Miyata 1000LT
Thanks! I love the way your rings make it look like a TA crank set.
__________________
*Recipient of the 2006 Time Magazine "Person Of The Year" Award*
Commence to jigglin’ huh?!?!
"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
Commence to jigglin’ huh?!?!
"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
#18
vintage motor


Joined: Sep 2008
Posts: 1,787
Likes: 350
From: Tepic, Nayarit, Mexico
Bikes: 48 Automoto, 49 Stallard, 50 Rotrax, 62 Jack Taylor, 67 Atala, 68 Lejeune, 72-74-75 Motobecanes, 73 RIH, 71 Zieleman, 74 Raleigh, 78 Windsor, 83 Messina (Villata), 84 Brazzo (Losa), 85 Davidson, 90 Diamondback, 92 Kestrel
Those are 2 of the nicest mass-produced bikes of the 70's IMO. Nice original examples too. I have a 75 GJ and have always kinda lusted after an orange Semi-Pro.
#20
Both gorgeous. Not a bad place to be stuck, especially if you are also stuck on orcas island.
I have always had a soft spot for those mid-70's Moto sport tourers, but have never been in the right place at the right time. I only recently realized those crazy Frenchmen didn't make a 22", so it's never going to happen. Boo.
I have always had a soft spot for those mid-70's Moto sport tourers, but have never been in the right place at the right time. I only recently realized those crazy Frenchmen didn't make a 22", so it's never going to happen. Boo.
#21
Full Member


Joined: Jul 2014
Posts: 492
Likes: 184
From: Central Illinois
Bikes: '86 Veloce, 72 Moto Le Champ , 72 Moto G.R., 75 Moto G.J. , 74 Moto G.R. frame, (2) 75 Moto G.J. mixte, numerous ballooners
Hey Orcas, glad to see you found another GJ. It looks really nice, on par with my silver and black one. I think I've got mine and its matching GJ mixte sold to a collector in CA
The short cage Jubilees were the lightest derailleurs on the market at that time. The addition of a long cage really didn't add much weight, so they're still incredibly light. The sexiest looking rear derailleurs of all time IMHO! As you have been told, they are a little fragile, so they take a bit of finesse to shift them ... don't be ham-fisted with them. You can only use up to a 28 tooth sprocket on the rear but with the long cage you can wrap up a lot of chain, so you can go really low on the front. The Stronglight 49d uses the same chainring pattern as the TA Cyclotourist, so you can get chainrings down to around 24 teet (maybe even smaller, I"m not sure). The Jubilee front derailleur handles a pretty wide range.
I'm building up a '75 Grand Record that I'm going to convert to 650B. It will use the long cage Jubilee, TA Cyclotourist 48-44-26 triple, MAFAC cantilevers and Lyotard Berthet platform pedals. Trying to keep it as much French as possible.
Enjoy your GJ!
Here's my matched pair:

And the raggedy Grand Record frame that will be my 650b conversion:
And the rest of the Moto collection ... a '72 GR (completely Campy), '72 Le Champion and a spare '75 GR frame and a "& GJ Mixte for my wife
The short cage Jubilees were the lightest derailleurs on the market at that time. The addition of a long cage really didn't add much weight, so they're still incredibly light. The sexiest looking rear derailleurs of all time IMHO! As you have been told, they are a little fragile, so they take a bit of finesse to shift them ... don't be ham-fisted with them. You can only use up to a 28 tooth sprocket on the rear but with the long cage you can wrap up a lot of chain, so you can go really low on the front. The Stronglight 49d uses the same chainring pattern as the TA Cyclotourist, so you can get chainrings down to around 24 teet (maybe even smaller, I"m not sure). The Jubilee front derailleur handles a pretty wide range.
I'm building up a '75 Grand Record that I'm going to convert to 650B. It will use the long cage Jubilee, TA Cyclotourist 48-44-26 triple, MAFAC cantilevers and Lyotard Berthet platform pedals. Trying to keep it as much French as possible.
Enjoy your GJ!
Here's my matched pair:
And the raggedy Grand Record frame that will be my 650b conversion:
And the rest of the Moto collection ... a '72 GR (completely Campy), '72 Le Champion and a spare '75 GR frame and a "& GJ Mixte for my wife
Last edited by motogeek; 04-11-16 at 08:58 AM.
#22
If I own it, I ride it


Joined: Nov 2005
Posts: 5,686
Likes: 821
From: Cardinal Country
Bikes: Lejeune(14), Raleigh, Raysport, Jan De Reus, Gazelle, Masi, B. Carré(4), Springfield, Greg Lemond, Andre Bertin, Schwinn Paramount
Good to see the GJ in its new home. The PO will be pleased it went to you. Are you considering getting a 49 for it? Here is a photo of the GJ before for those who did not see the evaluation thread:
JL Motobecanes ## by L Travers, on Flickr
JL Motobecanes ## by L Travers, on Flickr
#24
If I own it, I ride it


Joined: Nov 2005
Posts: 5,686
Likes: 821
From: Cardinal Country
Bikes: Lejeune(14), Raleigh, Raysport, Jan De Reus, Gazelle, Masi, B. Carré(4), Springfield, Greg Lemond, Andre Bertin, Schwinn Paramount
Glad it got there safely and really glad you are pleased with it.l
#25
aka Tom Reingold




Joined: Jan 2009
Posts: 44,338
Likes: 6,637
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
Both of those bikes are class acts. And that Avocet crankset has always been one of my favorites.
__________________
Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.




