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Thread: Pre 89

  1. #1
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    18th March 2004 - 17:38
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    Pre 89

    In Rule 25-2-3 in the MNZ rule book it states "APE and MTC and similar Big Block after-market engine blocks are prohibited" which appears clear cut but this line appears after the line Carbon Fibre and Kevlar are prohibited in Pre 72 and Pre 82 and before the line that states Carbon fibre and Kevlar are permitted for Pre 89. So does this mean Big Blocks are permitted in Pre 89?
    May be I should put this to MNZ to clarify this?
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  2. #2
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    15th May 2008 - 19:13
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    That rule appears in the general "preamble" covering all ages, before the specifics of each age group, (ie pre 72, pre 82 and pre89).

    Thus they are illegal in all age groups including pre 89.

  3. #3
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    8th November 2005 - 12:25
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    I must read the rules sometime...I know a fair few pre89 and pre82 bikes that are definitly running big bores! Mines a big sloppy standard bore haha....for now! Ill be putting in new pistons soon, still be 749cc though!

  4. #4
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    Quote Originally Posted by sugilite View Post
    I must read the rules sometime...I know a fair few pre89 and pre82 bikes that are definitly running big bores! Mines a big sloppy standard bore haha....for now! Ill be putting in new pistons soon, still be 749cc though!
    Big bores are fine. aftermarket cyclinder blocks which are designed for massive capacities in Drag racing aren't. Was done to keep costs down.

  5. #5
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    2nd September 2005 - 17:48
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    what is the deal with forced induction, i.e supercharging a ZXR400. if i was to use pre '89 parts - big old carb, mr2 supercharger.
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  6. #6
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    27th August 2007 - 10:38
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    Quote Originally Posted by CM2005 View Post
    what is the deal with forced induction, i.e supercharging a ZXR400. if i was to use pre '89 parts - big old carb, mr2 supercharger.
    Sorry no;
    MNZ Manual 25-5-7
    ....Turbo and supercharging shall not be allowed unless where original fitted equipment (eg Honda CX500 turbo, Yamaha XJ650 turbo ...
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