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Thread: 1170

  1. #141
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    Recap, The last dyno I did ended with 102 hp and 76 tq. Not bad, but i was expecting more. As soon as i got the bike home from the dyno i pulled the plugs and did a compression check. 170 psi front and rear. That told me the motor was hurt. I should have had 190+ psi. The culprit ended up being extreme valve float at upper rpms causing the valves to leak. I made 102/76 with 4 leaking valves. Ok, After that I got in touch with Aaron Wilson at Hammer Performance. This guy knows his stuff. I sent Hammer my top end for a complete redo. 3 months later i got my stuff back. They had to order custom pistons from CP is why it took them so long. Im still waiting on cams from Zippers, so theres not much i can do assembly wise until they show up. Wont be long though. Heres a few pics of the new stuff.

    30 degree Full Dome pistons made specifically for this application



    Headwork. Much better valvertrain than before. i can rev .600 lift cams to 8500 rpms with this setup



    Upgraded the primary too

  2. #142
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    So now, compared to last dyno, ill have bigger valves, bigger cams, much higher compression 11.9:1 is what the new build makes, ported TB 52mm up from 49mm, A billet primary that shaved 4.5 lbs off the rotating assembly. 120hp is still the goal.

  3. #143
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    May 2020
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    Well I'm officially jealous.

  4. #144
    Are you keeping the XB9 primary or installing an XB12? You have the torque now.

  5. #145
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    Quote Originally Posted by MotoRico View Post
    Are you keeping the XB9 primary or installing an XB12? You have the torque now.
    I’m gonna start with the 12 gearing. But I had evo industries make me an aluminum 34 tooth sprocket so I could run the 9 gearing if I want to switch back

  6. #146
    Senior Member 34nineteen's Avatar
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    lunatic_fringe is ___________ my spirit animal
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    I hate you.

    Dont forget to mention the work you had done on the crank at Dark Horse. Mikes motor sounds insane and revs so quick and smooth.

    My 1170 is going to be 12 gearing also.
    Last edited by 34nineteen; 04-13-2021 at 06:08 PM.

  7. #147
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    Ok. Here is the full roll call

    New 2008 XB9 crank, Knife edged, plugged, welded, and balanced.
    Completely blue printed and rebuilt engine cases
    Zippers iron lined aluminum 3.8125 bore cylinders
    Custom CP 11.9:1 compression 30 degree Full Dome pistons
    Hammer Performance Crush Head work--1.9 intake, 1.615 exhaust valves, comp cams conical valve springs, titanium retainers, 7mm stems
    Red Shift 605/591 cams custom made for this build
    S&S precision lifters
    S&S case studs
    Force Big Bore exhaust
    52mm ported TB with custom machined Velocity Stack
    Evo Industries billet primary with diamond terminator clutch and aluminum front engine sprocket
    custom lightened stator rotor
    Evo Industries Trans pulley
    Boca Bearing ceramic wheel and idler pully bearings

  8. #148
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    Jun 2015
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    Cincinnati
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    I’m hoping for 120hp and 90ish tq at 8400 rpms. I’ll post pics as I build the motor and get dyno results. We are getting close ladies and gentlemen.
    Last edited by mike lowary; 04-13-2021 at 07:53 PM.

  9. #149
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    Zippers just called. Cams are ready and shipping today. Lots to do, but I’m gonna try to have the motor built by the end of the weekend.

  10. #150
    Senior Member 34nineteen's Avatar
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    Quote Originally Posted by mike lowary View Post
    Zippers just called. Cams are ready and shipping today. Lots to do, but I’m gonna try to have the motor built by the end of the weekend.

    blah blah blah

    <sour grapes>



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