790 Cams And High Comp Pistons In An 865 Carb Speedmaster

Discussion in 'Technical Help' started by Wishbone, Apr 13, 2019.

  1. Wishbone

    Wishbone First Class Member

    Nov 4, 2018
    865
    643
    Essex UK
    Hi Guys,
    I have a set of Aria High compression pistons which I should be fitting on my 2007 Carb Speedmaster this weekend.

    I have the chance of set of 790 Speedmaster Cams from a 2003 for £140 is this a worthwhile addition?
     
  2. Wishbone

    Wishbone First Class Member

    Nov 4, 2018
    865
    643
    Essex UK
    Cheers half ton it said 10.8:1 on site.
    So I guess its spend time again:D
     
    • Like Like x 1
  3. Wishbone

    Wishbone First Class Member

    Nov 4, 2018
    865
    643
    Essex UK
    yep have DNA and igniter remap, rejetted carbs,
    spotted the pistons on ebay couple weeks back so bagged them; then the cams came up today so just bought them a few minutes ago. They are in Germany so wont see them for a few weeks
    Hoping to fit pistons tomorrow and add the cams when they show up.
     
    • Like Like x 2
  4. Wishbone

    Wishbone First Class Member

    Nov 4, 2018
    865
    643
    Essex UK
    Will be useful having a bit more grunt and power up top, its a pity they didn't start with 70hp as the min from factory?

    I know most of the reasons are emissions and noise adherence.
     
    • Agree Agree x 1
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