Online: Ultramick

Twin Cam 120ci build

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  • Surly
    Surly
    13 years ago

    Sounds tough. Love the new look too.

    cheers
    Surly

  • eyeball
    eyeball
    13 years ago
    120ci = roughly 1900cc?
  • fastapastor
    fastapastor
    13 years ago
    Very nice Stix looks like it will be a goa. It will be good to see what it runs on the strip. Maybe if you put it on a diet the group 2 ANDRA index for Super Twin/Bike (ST/B) is 9.90.
    All the best.
  • brucecul
    brucecul
    13 years ago
    wayne leonard up in cairns has one of these donks in a dyna . truly a site to behold.
  • brucecul
    brucecul
    13 years ago
    give him a call
  • Surly
    Surly
    13 years ago

    It isn't even the same bore and stroke as the 120R crate motor.

    While we are correcting things....what are the correct valve sizes Stix?

    cheers
    Surly

  • Outlaw01
    Outlaw01
    13 years ago
    I have a evo in a 87 FXR that does a 9.8 second down the quater mile. The thing is this engine is a monster!! It has trease cases , s&s bottom end , carrillo rods , my own design pistons ceramic coated , s&s heads that were bought as blanks and they have my design combustion chamber. There is a shit load of other parts and work gone into this. I've lost count of the amout of heads ive gone thru to get this right. It's taken 10yrs to get it to where it is now. It doesnt run wheely bars or airshift ethier.
  • Krash Kinkade
    Krash Kinkade
    13 years ago

    Oulaw is that the 113 inch Treese motor or the 147inch? what speed do you run @ what track did you do the 9.8?

    cheers sounds good know another guy with a 113" treese that races and has a new 147 treese cases corrillo rods but not TReese heads he is having frame built now

  • Krash Kinkade
    Krash Kinkade
    13 years ago

    Sounds good, the guy i know ran consistent 10 flat both at Sydney & willowbank raceway with the treese twin cam 113 john treese designed cams s&s heads ridgid frame.

    what wheelbase is your FXR?

  • Outlaw01
    Outlaw01
    13 years ago
    The frame was made by a mate of mine who originally did his time as a aircraft alloy welder. It has been re=designed quite a few times but it has the same wheel base as the standard fxr rake and trail is 1/2 a degree steeper.
  • Krash Kinkade
    Krash Kinkade
    13 years ago

    Outlaw, would be good to see you at the track, you must be a great rider! what clutch are you useing & what gearbox?also what is your best trap speed? do you have time cards? would be great to look at them! what 60ft times are you doing?

    I think you have the John Treese EVO cases?

    the motors i thought you had was the John Treese designed Twin Cam, he came out with that design before harley, but not interchangable with HD twin cam. more like an EVO.

  • Outlaw01
    Outlaw01
    13 years ago
    The cases are John Treese EVO not a twin cam. The Clutch is a Barnett unit and the gearbox is a Baker 5 speed .
  • Krash Kinkade
    Krash Kinkade
    13 years ago

    any way as i said would be great to see you at the track, what class do you race in?

  • Outlaw01
    Outlaw01
    13 years ago
    I just race it in the streetbike class even with everything I've done to it over the years I have kept it registered. The last time I had it down at the drags was 07 with my work commitments and the miles I need to do for work it's just been to hard to get there.
  • Jam
    Jam
    13 years ago

    Hi Gentleman

    I think I might say this for quite a few on here! There has been alot of time and money gone into a motor that many of us have followed from the beginning.  As we still have the final chapter, to come,  to conclude the story  by means of the drag strip if you would kindly like to start your own thread on the below EVO that would be great!

    That way we can continue to enjoy the orginal story without the junk below. With all due respect!

    Thanks Jam

  • andij
    andij
    13 years ago
    yeh stixs the front end will feel twitchy as though its a push bike ,maybe frontend from another speices .vrod even
  • andij
    andij
    13 years ago
    even a damper will stabilise the front if ya feel the wobbles ,the extra power transfers energy and weight to the rear giving the front end a lighter feeling .youll know after ur first black stripe up the track ,good luck mate
  • Krash Kinkade
    Krash Kinkade
    13 years ago

    That's great you will be getting to the track!

    won't be easy the first time, will be good to see what trap speeds she does.

    hope your weather is ok over there, ours is all over the place.

    Cheers good luck

  • eyeball
    eyeball
    13 years ago
    This might sound stupid, but the HD breathers are still letting the crankcase breath?
    I only ask as I wonder why the aftermarket breathers would let oil out and the HD ones not.
  • Krash Kinkade
    Krash Kinkade
    13 years ago

    the Twin Cams are much better than older motors at stopping wet sumping at high rev's. i don't know much about Dougherty, but i like the s&s reed valve as it lets pessure out crank and does not let it return.

    the bigger you make the motor the more crank case pressure, specially with longer stroke.

    good to see you have it solved'

    buggered if i know why but i do my best times on hot days as long as humidity it not high,

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