Vespa Primavera 70cc

Discussion in 'The Workshop' started by Evaneliasrees, May 8, 2022.

  1. Evaneliasrees

    Evaneliasrees New Member

    Hi All
    I have owned a 2014 Vespa primavera 50cc 2 stroke since late 2020, i have recently done a full engine rebuild with new gaskets etc and installed a stage 6 mkII race 70cc cylinder kit, HPC crankshaft, 21mm dellorto phbg carb, manual choke, polini variator- 4g rollers, stronger clutch springs, and a roost rs5 exhaust (with some small dents), and it will not for the life of it move, it will idle fine (requires a bit of throttle with the choke pulled out) and when on the stand it will rev up to the max readable rpm (14000) however when on the ground it will rev to about 4000-5000rpm and will ever do slightly creep forward, any help appreciated, TIA
  2. MARSH

    MARSH Whooooo!

    Piaggio Typhoon
    Fit all the original transmission and exhaust and try it, change one item at a time to find what piece is making a difference.

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