71' Triumph 250 Trailblazer information.

Discussion in 'Old's Cool' started by Jickimojo, Nov 2, 2006.

  1. Jickimojo

    Jickimojo Terminal Nomad

    Joined:
    Mar 2, 2006
    Oddometer:
    762
    Location:
    Big D TEJAS
    Hey I got an opportunity to buy a 71' triumph trailblazer 250.

    I am thinking of making it a little street tracker.:clap

    Here is a pic of the actual scoot:
    [​IMG]

    The bike is running with spot on compression it needs a Battery and the harness re-installed for the lights which are missing no biggie (I think). It still has the spedo and the original key. Well the price is $650.00 and it is local so no delivery.

    Anyone have any experience with these scoots and what should I be looking for.

    Thanks for your time
    #1
  2. Solo Lobo

    Solo Lobo airhead or nothing

    Joined:
    Mar 16, 2004
    Oddometer:
    9,176
    Location:
    Shoreline, WA
    The nice this is that you can buy all of the parts from two major on-line companies.... $650 looks like a great deal to me.

    I had the BSA version for a few years and am sorry that I ever sold it.
    #2
  3. pack

    pack Banned

    Joined:
    Oct 31, 2006
    Oddometer:
    224
    Location:
    OFallon, Mo.
    cool bike, i'd hook the lights back up, get it runnin' sweet and ride the hell out of it the way it is. a rare survivor, just seems a shame to modify it.
    Bill
    #3
  4. Jickimojo

    Jickimojo Terminal Nomad

    Joined:
    Mar 2, 2006
    Oddometer:
    762
    Location:
    Big D TEJAS
    Thanks for the replys!

    What are the two companies that you speak of to get parts.

    As for modifying it I dont plan on changing it to much just put some cool lights on it and ride it mostly.

    I also have a thing for trials sidecars but I dont think the little scoot will have enough power though.:evil
    #4
  5. panorton

    panorton Charming as F**k

    Joined:
    Mar 12, 2011
    Oddometer:
    476
    Location:
    Langley B.C.
    I just picked up a '72 :clap

    [​IMG]
    #5
  6. TopDogDave

    TopDogDave Manly, NSW, Australia

    Joined:
    Nov 13, 2007
    Oddometer:
    165
    Location:
    Manly, Syderney
    I had one....

    The clutch is prone to slip-well documented fault.. Get arounds include stronger springs, additional plates or sometimes just a washer under the clutch spring bolts will be anough extra to keep it from slipping.

    Kickstarter springs weak and prone to break...not a biggie either.

    Engines the same as the BSA B25 so parts are interchangeable.

    They rattle a bit but dead easy to maintain and simple design.

    I now have a B50MX to rebuild :)

    Dave
    #6
  7. concours

    concours WFO for 41 years

    Joined:
    Dec 2, 2008
    Oddometer:
    5,441
    Location:
    Kensington, NH USA

    +1 :cry Keep the old girl stock... get a CL350 if you're gonna play Monster Garage :clap
    #7
  8. marksbonneville

    marksbonneville Been here awhile

    Joined:
    May 12, 2008
    Oddometer:
    966
    Location:
    Arizona, Prescott more less.
    Wow what a clean old Triumph how about more pics and whats the story with the project in the background?
    #8
  9. Pigford

    Pigford British

    Joined:
    Sep 27, 2009
    Oddometer:
    995
    Location:
    North Dorset, UK
    Sweet looking bike for just $650 :wink: You gotta go for it... can't loose!

    Buy it - Ride it........ Back to Basics motorcycling at its purest :clap Great little back-lane scoot
    #9
  10. England-Kev

    England-Kev Long timer

    Joined:
    Feb 5, 2007
    Oddometer:
    3,771
    Location:
    England. Somewhere on the Canal.
    That is a steal at that price, and it sure would be a shame to mess with what looks like a very clean classic bike.
    #10
  11. panorton

    panorton Charming as F**k

    Joined:
    Mar 12, 2011
    Oddometer:
    476
    Location:
    Langley B.C.
    thats my dad's project. it's a bit of a frankenstien's monster. i can't remember all the details, but, it started as a touring "T" shortened to just one door. then stretched the doors so he (a pensioner) can get in and out again.
    #11
  12. Prmurat

    Prmurat Long timer

    Joined:
    Oct 28, 2011
    Oddometer:
    1,132
    Location:
    San Francisco, CA
    I had the twin sister, sold it last year, a BSA Starfire... Very often these 250 have been neglected , trashed and ridden to their death. Insides are worn and they were cheaply built to begin with. All parts are available but expensive (NOS indexed on gold value), it costed me more to rebuild it than the same work on my Commando!
    IMHO redoing them differently than stock is a waste of money: won't add anything to the resale value, au contraire!!
    If properly rev the bike is fun and not slower than a 441...
    #12
  13. jbcaddy

    jbcaddy Long timer

    Joined:
    Jan 12, 2010
    Oddometer:
    1,228
    Location:
    Oroville & Placerville, California U.S.of A.
    Jickimojo, buy it before somebody else does!
    Chico CA craigs list has one for not even close to the same shape for $1500.If I were you, I'd already be in my truck headed to get that one you found

    http://chico.craigslist.org/mcy/3529101278.html
    #13
  14. Bud Tugly

    Bud Tugly Gnarly old curmudgeon

    Joined:
    Feb 14, 2007
    Oddometer:
    241
    Location:
    Ishpeming, MI
    They were just about the slowest 250's on the market in their day, so making one into some pseudo-racer is rather pathetic. The European and Japanese 2-stokes had already sounded a death knell to the old 4-stoke dominance in racing by the time this version came out.

    They hit the mark for classic good looks IMO though, so keeping it at least close to stock preserves that which was great about them. I'd love to have it just for that reason.
    #14
  15. TopDogDave

    TopDogDave Manly, NSW, Australia

    Joined:
    Nov 13, 2007
    Oddometer:
    165
    Location:
    Manly, Syderney
    checkout b50.org it has areas for T25 and B25 as well as B50 etc
    Dave
    #15
  16. ttpete

    ttpete Rectum Non Bustibus

    Joined:
    May 13, 2009
    Oddometer:
    6,196
    Location:
    Dearborn, MI
    Actually, they were raced in 250 flat track in the 1960s. Nixon rode one. I have the factory manual for building the engine and a factory cam and lifters. The engine is basically half of a Triumph 500 twin.
    #16
  17. Rich B

    Rich B Been here awhile

    Joined:
    Apr 10, 2010
    Oddometer:
    825
    Location:
    Stone Creek, OH
    With the exception of using a Triumph 500 twin rod (or close facsimile of one), the engine shares little with the 500 twin. The basic design is firmly rooted with the Triumph Cub/Terrier design of the early 50's. BSA took that woeful design and stretched it way beyond its humble beginnings.

    If anyone is going to get serious about buying a BSA based unit single, you need to get a copy of "Rupert Ratio's Unit Single" book. A lot of very good info on sorting them out and keeping them alive.

    The clutch can be a bit weak, but more so on the 441's & B50's. Not so bad on a B/T25 engine. But the clutch can be improved.

    The end of the line unit singles had a lot of issues resolved. The B/T25 had an oil filter and an improved OPRV which they badly needed.
    #17
  18. Bud Tugly

    Bud Tugly Gnarly old curmudgeon

    Joined:
    Feb 14, 2007
    Oddometer:
    241
    Location:
    Ishpeming, MI
    The Brit singles and twins were major forces in road and dirt racing up through the early 60's but by the mid to late 60's they were getting routinely smoked by the European 2-stokes. Bultaco, CZ, Husqvarna, Maico, Montessa, and others were selling models that put out nearly double the HP of most same displacement 4 strokes right from the showroom, and when the Japenese jumped into the fray by the early 70's the British brands were pretty much obsolete from competetive racing across the board. Even Honda went the 2 stroke route for their serious dirt racers.

    By 1971 the 250 Triumphs were already "old school" models, but they sure were pretty. I wanted one just for that reason back then and would still love to have one for nostalgia's sake, but their day was pretty nearly done.
    #18
  19. ttpete

    ttpete Rectum Non Bustibus

    Joined:
    May 13, 2009
    Oddometer:
    6,196
    Location:
    Dearborn, MI
    Had the book for a long time. It was similar in bore and stroke, as was the 750 triple. I currently own a C15T, have owned several each of the B44 and B50.
    #19
  20. Steve G.

    Steve G. Long timer

    Joined:
    Oct 30, 2004
    Oddometer:
    7,413
    Location:
    West is the Best

    Better to try to make it street legal. Racing this thing will be a serious money pit, and probably explode causing shrapnel damage to your legs. It's a seriously under-engineered engine, that's why it was so softly tuned when new.
    #20