Advertise on Bikeforums.net



User Tag List

Page 1 of 2 12 LastLast
Results 1 to 25 of 30
  1. #1
    Too Fat for This Sport Diegomayra's Avatar
    Join Date
    Apr 2009
    Location
    Northern California
    My Bikes
    2011 Cannondale Supersix
    Posts
    689
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    1990 Miyata 721A

    I have been endlessly searching the criagslists ads in my area for a good vintage bike that would serve as a commuter to and back from school. Finally, I located a good looking bike in excellent condition. Its a 1990 721A Miyata, I was going to talk the guy down to $125, but the condition of the bike was nice enough that I paid him $150. He was originally asking $200.

    Now, I do not know much about the bike, but after a brief test ride I was convinced that it performed well and had adequate stopping power. There was a terrible shadow being cast by the afternoon sun and I couldn't wait till tomorrow. So if this violates any BF rules I apologize.

    What are some of the things I "should" change? This bike will be ridden to a local JC on a daily basis and if I plan to change anything, it should not attract thieves attention.


    Miyata 721A by Diegomayra, on Flickr


    Miyata 721A by Diegomayra, on Flickr


    Miyata 721A by Diegomayra, on Flickr


    Miyata 721A by Diegomayra, on Flickr


    Miyata 721A by Diegomayra, on Flickr


    Miyata 721A by Diegomayra, on Flickr


    Miyata 721A by Diegomayra, on Flickr


    Miyata 721A by Diegomayra, on Flickr
    Opinions and suggestions appreciated. What is the purpose of the thread on the bottom of the down tube, picture below.


    Miyata 721A by Diegomayra, on Flickr

    Originally posted in the Classic and Vintage Appraisal forum, this seems like the more appropriate forum.
    Last edited by Diegomayra; 08-30-11 at 12:24 PM.

  2. #2
    Senior Member mazdaspeed's Avatar
    Join Date
    Jun 2007
    Location
    WA state
    Posts
    4,816
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Wow, you got an amazing deal on that.

  3. #3
    Steel is real, baby! frpax's Avatar
    Join Date
    Dec 2008
    Location
    Tempe, AZ
    My Bikes
    1987 Basso Gap; 1987 Specialized Sirrus; 1990 Miyata 721A
    Posts
    2,527
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have a '90 721A also. Awesome bike. $150 is a steal.

  4. #4
    SNARKY MEMBER CardiacKid's Avatar
    Join Date
    Jul 2005
    Location
    South Austin
    Posts
    2,829
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Throw a bunch of mud and oil on the frame, possibly some ugly stickers and get a good lock or 3. I don't see anything else that needs to be changed. However, pictures of the drive side of the bike are always helpful.

  5. #5
    Senior Member due ruote's Avatar
    Join Date
    Dec 2006
    Posts
    4,404
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Yeah, that would have been a totally respectable bargain at the asking price.

    How's it fit? That's a pretty aggressive position for a commuter; you might try raising the bars a bit.

    I agree you should take some of that money you saved and buy the best darn lock you can find.

  6. #6
    Senior Member
    Join Date
    Aug 2008
    Posts
    75
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    That bike is nice. I have a 89 718a and realy enjoy it.

    I would get a cheap vintage mountain bike to commute and not worry about damage or theft.

    Then I would ride that Miyata where it shines, on the hills and over distance.

  7. #7
    Senior Member Chicago Al's Avatar
    Join Date
    Jun 2009
    Location
    Chicago, the leafy NW side
    Posts
    2,252
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    +1 I don't know that particular model from direct experience...but it looks to me like what you should change is the BIKE as that one is too nice to use as a commuter!
    I never think I have hit hard, unless it rebounds.

    - Dr Samuel Johnson

  8. #8
    Senior Member miamijim's Avatar
    Join Date
    Aug 2003
    Location
    Tampa, Florida
    Posts
    12,073
    Mentioned
    27 Post(s)
    Tagged
    1 Thread(s)
    Just a reminder for me to comment tomorrow about the 721a's major flaw. No worries, its a great bike and you should buy it for that price ASAP.
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

  9. #9
    Senior Member miamijim's Avatar
    Join Date
    Aug 2003
    Location
    Tampa, Florida
    Posts
    12,073
    Mentioned
    27 Post(s)
    Tagged
    1 Thread(s)
    The 721a was originaly spec'd with a Shimano Mountain LX front derailleur and a Biopace crankset. typical FD setup call for it to mounted about a nickles width above the front chainring. With Biopace rings you simply align the crankarms with the seat tube, lower the FD so its about the thivkness of a nickle above the ring and tighten it up.

    That can not be done of the 721a because the inner FD cage will heavily rub on the middle Biopace ring. to fix the issue you have 3 options:

    1. Raise the FD high enough so it doesnt rub the middle ring. This isnt very feasable because it needs to be raised so high that shifting is compromised and so high that the chain will drag on the tail of the RD
    2. Ditch the Biopace rings
    3. Ditch the FD

    My recommendation is to ditch the outer and middle Biopace rings and then lower the FD to its proper height.
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

  10. #10
    PanGalacticGargleBlaster Zaphod Beeblebrox's Avatar
    Join Date
    Apr 2009
    Location
    Smugglers Notch, Vermont
    My Bikes
    Upright and Recumbent....too many to list, mostly Vintage.
    Posts
    7,488
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Diegomayra View Post
    There was a terrible shadow being cast by the afternoon sun and I couldn't wait till tomorrow. So if this violates any BF rules I apologize.

    Opinions and suggestions appreciated. What is the purpose of the thread on the bottom of the down tube, picture below.

    That appears on several of the higher-end Miyatas, I believe its called a "CO2 bottle basement". There's a little holster you can get that holds a pair of CO2 cartridges for filling up a flat tire in a hurry....it screws to that boss.

    The only BF rule you violated was you only posted pictures of the Non-Drive side of the bike....we wanna see the Drive side so we can ogle the crankset & derailleurs

    great find, awesome deal....if theft is a concern forget about a lock...park it inside in a place it wont walk away.
    --Don't Panic.

  11. #11
    OCD Moderator cb400bill's Avatar
    Join Date
    Jul 2007
    Location
    Kalamazoo MI
    My Bikes
    1985 Trek 770, 2006 Cannondale Synapse, 1976 Viscount Aerospace Pro
    Posts
    7,989
    Mentioned
    8 Post(s)
    Tagged
    0 Thread(s)
    Nice bike at a great price.

    Here is a link to the 1990 Miyata specs page.

    http://2.bp.blogspot.com/_whtVpXkKwl...0-h/img249.jpg
    Laterally stiff yet vertically compliant.

    Viscount Aerospace Pro Trek 770 Cannondale Synapse

  12. #12
    Senior Member RobbieTunes's Avatar
    Join Date
    Dec 2007
    Posts
    15,653
    Mentioned
    49 Post(s)
    Tagged
    2 Thread(s)
    Trade it to me for a commuter bike.....

    Robbie ♪♫♪...☻

    I'm not a doctor, but I watch them on TV.

    1982 Lotus Classique
    1987 D'Arienzo (Basso) SLX
    1995 Hot Tubes TT
    2006 Cinelli XLR8R-2
    2008 BMC Roadracer SL01
    2014 Wraith Hustle
    2014 Wraith Paycheck

  13. #13
    Too Fat for This Sport Diegomayra's Avatar
    Join Date
    Apr 2009
    Location
    Northern California
    My Bikes
    2011 Cannondale Supersix
    Posts
    689
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by miamijim View Post
    The 721a was originaly spec'd with a Shimano Mountain LX front derailleur and a Biopace crankset. typical FD setup call for it to mounted about a nickles width above the front chainring. With Biopace rings you simply align the crankarms with the seat tube, lower the FD so its about the thivkness of a nickle above the ring and tighten it up.

    That can not be done of the 721a because the inner FD cage will heavily rub on the middle Biopace ring. to fix the issue you have 3 options:

    1. Raise the FD high enough so it doesnt rub the middle ring. This isnt very feasable because it needs to be raised so high that shifting is compromised and so high that the chain will drag on the tail of the RD
    2. Ditch the Biopace rings
    3. Ditch the FD
    My recommendation is to ditch the outer and middle Biopace rings and then lower the FD to its proper height.
    Thanks Jim, I had read the information on another thread, where your shop brought the problem to the attention to Miyata. Here is a picture of the rings, are these Biopace? They are labeled Mountain LX.???


    As of yet there aren't any problems with the ride, the one minor glitch I experience is shifting between the highest front ring and the 4th cog on the rear cassette. Is this related to the FD/Ring Combo?

  14. #14
    Senior Member miamijim's Avatar
    Join Date
    Aug 2003
    Location
    Tampa, Florida
    Posts
    12,073
    Mentioned
    27 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by Diegomayra View Post
    are these Biopace? They are labeled Mountain L?
    If they look out of round when you spin the crank they're Biopace.

    Notice how high the FD is mounted? If you were to shift into the small front chainring and the smaller cogs in the back you'll find that the chain will drag on the tail of the FD. Lowering the FD to eliminate the tail drag will cause the FD's inner plate to rub on the middle ring.

    I'd dump the rings. 110 BCD round chainrings are dirt cheap.
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

  15. #15
    Steel is real, baby! frpax's Avatar
    Join Date
    Dec 2008
    Location
    Tempe, AZ
    My Bikes
    1987 Basso Gap; 1987 Specialized Sirrus; 1990 Miyata 721A
    Posts
    2,527
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Zaphod Beeblebrox View Post
    That appears on several of the higher-end Miyatas, I believe its called a "CO2 bottle basement". There's a little holster you can get that holds a pair of CO2 cartridges for filling up a flat tire in a hurry....it screws to that boss.
    I really want one of those bottle basements!

  16. #16
    Velophile Epicus07's Avatar
    Join Date
    Mar 2009
    Location
    Seattle, WA
    My Bikes
    Specialized Roubaix, Specialzed Allez Sport, Guerciotti SLX
    Posts
    1,028
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Its beautiful! One of the nicest Miyatas i've seen.

    I miss my 85 912 :*( shouldn't have sold it
    2009 Specialized Roubaix - Long Distance Bike
    2002 Rodriguez Adventure - Touring Bike
    1996 Guerciotti PRX - Italian Steel Joy ride
    1996 Litespeed Natchez - Titanium Speed Demon (pics to come)

  17. #17
    Senior Member bumpalong's Avatar
    Join Date
    Sep 2009
    Location
    New England
    My Bikes
    2001 LeMond Poprad, 1983 Vitus, 1973 Raleigh Gran Sport, 1983 Fuji Del Rey, 1974 Fuji S-10, 1956 Triumph, 1971 Raleigh DL-1, 1964 Phillips, 1982 Motobecane Supermirage, 1962 Raleigh Superb, 1958 Robin Hood, 1966(?) Raleigh Sprite
    Posts
    251
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Stunning bike! The frame is immaculate. Had it ever been ridden?

    What do you think of how that aluminium frame rides?

    And thanks - now I know what that bolt on the bottom of my 914 is for...

  18. #18
    Senior Member delux68's Avatar
    Join Date
    Jul 2008
    Location
    south florida
    My Bikes
    a bunch, bmx, mtn, and a few classics
    Posts
    80
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    wish we could still see the pictures

  19. #19
    Senior Member Giacomo 1's Avatar
    Join Date
    Aug 2011
    Location
    Queens NYC
    Posts
    2,022
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by delux68 View Post
    wish we could still see the pictures
    Yeah, what happened to the pics?

  20. #20
    Too Fat for This Sport Diegomayra's Avatar
    Join Date
    Apr 2009
    Location
    Northern California
    My Bikes
    2011 Cannondale Supersix
    Posts
    689
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Giacomo 1 View Post
    Yeah, what happened to the pics?
    Sorry about that, the pics are back up now. No idea how they dropped off the internet, weird. Re-linked.

  21. #21
    Papa Wheelie Sigurdd50's Avatar
    Join Date
    Feb 2005
    Location
    Madison, Wi
    My Bikes
    Jamis Aurora '02; Takara Medalist (650B)
    Posts
    1,472
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by miamijim View Post
    The 721a was originaly spec'd with a Shimano Mountain LX front derailleur and a Biopace crankset. typical FD setup call for it to mounted about a nickles width above the front chainring. With Biopace rings you simply align the crankarms with the seat tube, lower the FD so its about the thivkness of a nickle above the ring and tighten it up.

    That can not be done of the 721a because the inner FD cage will heavily rub on the middle Biopace ring. to fix the issue you have 3 options:

    1. Raise the FD high enough so it doesnt rub the middle ring. This isnt very feasable because it needs to be raised so high that shifting is compromised and so high that the chain will drag on the tail of the RD
    2. Ditch the Biopace rings
    3. Ditch the FD

    My recommendation is to ditch the outer and middle Biopace rings and then lower the FD to its proper height.
    Easy solution... ditch the FD, ditch all but the middle chain ring.
    Put some Porteur Bars on it. Make it a 1 x 7 speed
    Everyone on the commuter routes will drop their jaws and want it bad.
    Love the Miyata logo but I have mixed feelings about the post disco, mod color decals

  22. #22
    Senior Member Giacomo 1's Avatar
    Join Date
    Aug 2011
    Location
    Queens NYC
    Posts
    2,022
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Geez, I would have gave him his $200 and still walked away feeling like I got over!

    Great looking bike. Really clean for it's age. I have a 1400 AlumiTech and I love the bike. Very light and nimble. And to be honest, I think it rides great. I know many here don't care for alum frames, but I have no complaints. I've gotten many compliments on mine and I'm quite sure you will to. The bonding process Miyata came up with seems very sound also. From what I can tell, you won't ever find a problem with it, and the smooth seams on the tubes look fantastic to.

    Ride her well!
    Colnago Super
    Torelli Pista
    Basso Gap
    Fabio Barecci
    Miyata 1400A

    It never gets easier, you just go faster. ~ Greg LeMond

  23. #23
    Senior Member miamijim's Avatar
    Join Date
    Aug 2003
    Location
    Tampa, Florida
    Posts
    12,073
    Mentioned
    27 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by Sigurdd50 View Post
    Easy solution... ditch the FD, ditch all but the middle chain ring.
    Put some Porteur Bars on it. Make it a 1 x 7 speed
    Everyone on the commuter routes will drop their jaws and want it bad.
    Maybe 18 months ago they would......
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

  24. #24
    Senior Member
    Join Date
    Nov 2004
    My Bikes
    A few
    Posts
    896
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    My 914 also has that boss under the down tube for CO2. When I got the bike, Tmar told me what it was and said that it put on those early triathlon bikes so the athletes could quickly access air if they got a flat. Does anyone know where to get the brackets that attach there? I found this, is that the one it was designed for?

    That is a great bike and I think you will love the way it rides!
    Last edited by Ciufalon; 08-30-11 at 05:53 PM.
    Be the person your dog thinks you are.
    T.J.

  25. #25
    Senior Member zmensing's Avatar
    Join Date
    May 2011
    Location
    Bay Area, CA
    My Bikes
    1989 Miyata 618GT, 2009 Orbea Orca Dura-ace (broken in half), 1991 Koga Miyata FullPro ex-Tulip
    Posts
    155
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Beautiful bike, really like the finish, and my oh my is that in amazing shape. As someone else said, looks like it hasn't even been ridden! Hope you're loving it!
    1989 Miyata 618 GT
    1991 Koga-Miyata FullPro
    1990 Gazelle Champion Mondial AB (in progress)
    1990 Team Miyata

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •