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    Big bore question

    I was talking to my usual mechanic the other day and he said that there is a 816 big bore kit availble for the Hawk. The biggest one I`ve been able to find is 696 however. I say he`s full of ****

    So, does anyone know what the biggest big bore kit for a hawk is?
    What was the start of all this?
    When did the cogs of my Hawk begin to turn?
    Perhaps it is impossible to grasp the answer now,
    from deep within the flow of time...

    But, for a certainty, back then,
    I loved it so much, yet hated so many.
    I hurt others and was hurt myself...

    Yet even then, I rode like the wind,
    whilst my laughter echoed
    under cerulean skies...

    #2
    The biggest over here in Germany is a 840 available from Thiele
    http://www.thiel-motoren.de/tuning.html

    Comment


      #3
      But is he using the AT engine?
      "Life may begin at 40, but it doesn't get real interesting until about 150."

      • '88 in Candy Flair Blue + '90 in Italian Red
      • Ohlins Rear Shock
      • F2 front wheel
      • VFR750 rear wheel
      • Hiperform seat&headers
      • MSMotorsport Seat Cowl
      • Steve Lenac Tokico six pot caliper

      Comment


        #4
        Originally Posted by JR
        But is he using the AT engine?
        I guess so. you can`t make a Hawk 840cc I`d say. that`s a bit TOO much

        edit: the same method is applied to the afrika twin 650 and the NTV, so I guess it can be done...

        fabitappi, could you translate just what they do with it to get it to almost 70bhp an 80nm? my deutch is dreadfull.
        What was the start of all this?
        When did the cogs of my Hawk begin to turn?
        Perhaps it is impossible to grasp the answer now,
        from deep within the flow of time...

        But, for a certainty, back then,
        I loved it so much, yet hated so many.
        I hurt others and was hurt myself...

        Yet even then, I rode like the wind,
        whilst my laughter echoed
        under cerulean skies...

        Comment


          #5
          Excerpt from the Tuning program for Honda Hawk:

          The Tuningstufe for Honda Hawk applies also to:
          Africa twin 650, Africa twin 750, Honda NTV 650 (Revere), Honda Transalp starting from 2000 (650ccm) and Honda Douville.


          Tuningvariante 1: Achievement and torque increase with series capacity and series cam shafts

          Revise the combustion chambers, channels and tax times
          Engine disassembly and assembly
          Carburetor tuning
          Increased output approx. 8-10 HP and approx. 8-10 Nm


          Tuningvariante 2: Achievement and torque increase with piston +2-+3mm as well as changed cam shafts

          Work like above
          additionally adapt the piston on original weight
          Cylinders bore and hone
          Increased output approx. 15-18 HP and approx. 15 Nm with 680ccm - 700ccm capacity


          Tuningvariante 2a: Achievement and torque increase with 3mm larger valves:


          Work like above
          additionally change the clapper seats and work on the new valves.


          Tuningvariante 3: Achievement and torque increase with piston 87 - 90 mm in diameter and larger valves (+3mm)

          Work as with variant 2
          additionally change seat rings & channels adapt
          Crankshaft housings spindle









          Africa twin 750 series (Bj 92)
          58 HP (43 KW) with 7600/min
          61 Nm with 5800/min


          Thiel - XRV750 stage 1
          (Africa twin 750 RD04 Bj 92) with auxiliary air cleaner,
          Series elbow union and
          SR muffler with railways killer.
          73 HP (54 KW) with 7300/min
          76 Nm with 6100/min
          "Life may begin at 40, but it doesn't get real interesting until about 150."

          • '88 in Candy Flair Blue + '90 in Italian Red
          • Ohlins Rear Shock
          • F2 front wheel
          • VFR750 rear wheel
          • Hiperform seat&headers
          • MSMotorsport Seat Cowl
          • Steve Lenac Tokico six pot caliper

          Comment


            #6
            holy cow. that is pretty amazing. and pretty expensive probably
            What was the start of all this?
            When did the cogs of my Hawk begin to turn?
            Perhaps it is impossible to grasp the answer now,
            from deep within the flow of time...

            But, for a certainty, back then,
            I loved it so much, yet hated so many.
            I hurt others and was hurt myself...

            Yet even then, I rode like the wind,
            whilst my laughter echoed
            under cerulean skies...

            Comment


              #7
              Has anyone here actually installed a big bore kit on his Hawk? Because I`d like to know a few things:

              1 let`s say you install a 816 big bore kit. what kind of bhp/NM would you roughly get?

              2 what are the costs to go the full monty?

              3 what does it do to the bike sheer indestructability? will it become less reliable? or doesn`t it make any difference?
              What was the start of all this?
              When did the cogs of my Hawk begin to turn?
              Perhaps it is impossible to grasp the answer now,
              from deep within the flow of time...

              But, for a certainty, back then,
              I loved it so much, yet hated so many.
              I hurt others and was hurt myself...

              Yet even then, I rode like the wind,
              whilst my laughter echoed
              under cerulean skies...

              Comment

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