Thinking about a 70's 2 stroke triple

Discussion in '2 smokers' started by cmattina, Mar 27, 2020.

  1. Brad-Man

    Brad-Man Been here awhile

    Joined:
    Jan 8, 2013
    Oddometer:
    172
    Location:
    Marietta, GA
    I think the GT550 is your best bet.

    Lower half seals should be replaced at a minimum.
    #21
  2. Moto sicko

    Moto sicko Been here awhile

    Joined:
    Oct 14, 2019
    Oddometer:
    105
    Location:
    Colorado
    I picked up a 75 this summer, my first big 2 stroke bike for $600, first order of business was to see if the motor Would run, it did but holy crap it was a total smoke bomb and wouldn’t run under 4000 rpm, so I rebuilt carbs, ignition, static timed And put on a remote fuel tank with pre mix, 4 kicks with choke and she fired off with way less smoke, over the last weeks I’ve ran a gallon of pre mix thru it on the lift table fine tuning carbs & timing, she idles at 1200rpm with minimal smoke and no seal leaks, so now it go’s down to a bare frame and work my way back to the street, New Oem parts are $$ and few, refurbishing as much as possible, will be a cherished bike when finished 1CBCAE54-E46F-463F-BB37-5BD238EEDE06.jpeg 1C40E454-596E-45E6-96E4-7776B0D9B95D.jpeg FD6843FD-3FDB-4D55-9B08-B11A13BBB3CB.jpeg 5A83663A-6FF7-4756-9CEB-F8C4E6C10A67.jpeg
    #22
  3. busa1300

    busa1300 Been here awhile

    Joined:
    Feb 22, 2014
    Oddometer:
    914
    Location:
    Frozen North...
    If going through that much work on a cherished rebuild, splitting the cases and at least putting in new seals would be recommended.
    An air cooled piston port engine is quite easy to rebuild from a mechanical standpoint....finding the parts would be harder than installing I think.
    #23
  4. Moto sicko

    Moto sicko Been here awhile

    Joined:
    Oct 14, 2019
    Oddometer:
    105
    Location:
    Colorado
    Yea thanks, I’ll consider that, but I usually don’t fix things that aren’t broken.....
    #24
  5. Spikester300

    Spikester300 Roll Tide!

    Joined:
    Feb 19, 2009
    Oddometer:
    165
    Location:
    Killen, Alabama
    Your probably OK just testing the motor on premix but don't do away with the pump and attempt to run it on premix only. Suzuki's oil the crank bearings off the pump and they will fail with premix only in a short time. The CCI system is very dependable.
    #25
    spo123, MacNoob and greasyfatman like this.
  6. TNWillie

    TNWillie Long timer

    Joined:
    Sep 18, 2012
    Oddometer:
    1,475
    Location:
    NE TN
    Good luck on your resto. I always liked the 550 Triple even though I had a Buffalo at the time.
    #26
  7. Moto sicko

    Moto sicko Been here awhile

    Joined:
    Oct 14, 2019
    Oddometer:
    105
    Location:
    Colorado
    Yes I plan on running the pump on the next startup, it seems to work fine
    yes I plan on using the pump on next startup, I ran it a couple of times previously, seems to work fine, thanks
    #27
  8. Moto sicko

    Moto sicko Been here awhile

    Joined:
    Oct 14, 2019
    Oddometer:
    105
    Location:
    Colorado
    thanks, I’ve got a friend that’s got a gt750 covered in dust surrounded by old triumphs, he’s not really interested in old jap bikes but I can’t seem to pry it away from him...yet
    #28
    Bucho and mikeysduck like this.
  9. TNWillie

    TNWillie Long timer

    Joined:
    Sep 18, 2012
    Oddometer:
    1,475
    Location:
    NE TN
    Keep tryin. You can thank me when you succeed. ;)
    #29
  10. Moto sicko

    Moto sicko Been here awhile

    Joined:
    Oct 14, 2019
    Oddometer:
    105
    Location:
    Colorado
    Moving along on rebuild... image.jpg
    #30
    hoodellyhoo, Bucho and TNWillie like this.
  11. Moto sicko

    Moto sicko Been here awhile

    Joined:
    Oct 14, 2019
    Oddometer:
    105
    Location:
    Colorado
  12. TNWillie

    TNWillie Long timer

    Joined:
    Sep 18, 2012
    Oddometer:
    1,475
    Location:
    NE TN
    That looks GREAT! Did you update the fork internals, or did I miss that post?
    #32
  13. Moto sicko

    Moto sicko Been here awhile

    Joined:
    Oct 14, 2019
    Oddometer:
    105
    Location:
    Colorado
    Thanks, I did replace the seals DF084034-7630-4EAD-BC2F-2988D50AD2BA.jpeg as needed, I also installed 1/4” preload on the springs to firm it up a little
    #33
  14. Moto sicko

    Moto sicko Been here awhile

    Joined:
    Oct 14, 2019
    Oddometer:
    105
    Location:
    Colorado
    #34
    spo123, Scoozi, greasyfatman and 5 others like this.
  15. Spikester300

    Spikester300 Roll Tide!

    Joined:
    Feb 19, 2009
    Oddometer:
    165
    Location:
    Killen, Alabama
    Looks great!
    #35
  16. Florida Lime

    Florida Lime Long timer Supporter

    Joined:
    Sep 5, 2008
    Oddometer:
    11,435
    Location:
    Florida, but soon fulltime in Robbinsville, NC
    Currently on CL in Colorado -$14,500 upload_2021-4-26_13-58-1.png

    I wanted one bad back then, in spite of the color. :lol3
    #36
    chazbird likes this.