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Thread: Rule change submissions close 1 March 2016 - be in to win.

  1. #121
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    Quote Originally Posted by TZ350 View Post
    Thanks Husa. You know, that link does not work for me, strange!!!!

    Ok so now we have the up to date 2015 text with the rule change possibilities and an S after the word "Kart motor".

    Option 1, a refined definition of 24mm carb equivalent that takes into account EFI and throttle plate carbs like the Tillotson pumper carb.

    Chapter 24 – Road Racing – Miniature
    24.2 - Engines must be derived from non-competition motorcycles. Motocross, Road Racing, Enduro
    and Go Kart motors and transmission parts are not permitted. There shall be no restriction on the
    make, type or design of carburettor, ignition, exhaust, piston, cam, valve springs or cooling system
    except for class eligibility. All engines must be normally aspirated except F4 4 stroke engines of less
    than 100cc capacity and F4 2 stroke engines of less than 70cc capacity, which may be turbo or
    supercharged. F4 2 stroke engines over 104cc ; At some point in the inlet tract(s) between atmosphere and crankcase or barrel, the inlet tract(s) shall not exceed an area of 452mm2 (24mm equivalent) in total. For the purposes of measurement, EFI throttle body idle air circuit if any and carburettor air bleed jets and orifices shall be ignored. F5 4 stroke engines over 53cc are restricted to carburetion equivalent to a single
    20mm carburettor

    Option 2 same as 1 but without the F5 4T 20mm carb restriction

    Chapter 24 – Road Racing – Miniature
    24.2 - Engines must be derived from non-competition motorcycles. Motocross, Road Racing, Enduro
    and Go Kart motors and transmission parts are not permitted. There shall be no restriction on the
    make, type or design of carburettor, ignition, exhaust, piston, cam, valve springs or cooling system
    except for class eligibility. All engines must be normally aspirated except F4 4 stroke engines of less
    than 100cc capacity and F4 2 stroke engines of less than 70cc capacity, which may be turbo or
    supercharged. F4 2 stroke engines over 104cc ; At some point in the inlet tract(s) between atmosphere and crankcase or barrel, the inlet tract(s) shall not exceed an area of 452mm2 (24mm equivalent) in total. For the purposes of measurement, EFI throttle body idle air circuit if any and carburettor air bleed jets and orifices shall be ignored.

    Option 3, no carb restrictions at all.

    Chapter 24 – Road Racing – Miniature
    24.2 - Engines must be derived from non-competition motorcycles. Motocross, Road Racing, Enduro
    and Go Kart motors and transmission parts are not permitted. There shall be no restriction on the
    make, type or design of carburettor, ignition, exhaust, piston, cam, valve springs or cooling system
    except for class eligibility. All engines must be normally aspirated except F4 4 stroke engines of less
    than 100cc capacity and F4 2 stroke engines of less than 70cc capacity, which may be turbo or
    supercharged.

    Now if we could have no restrictions on fuel type or additives for 4T's of less than 100cc and 2T's of less than 70cc then we could see some very interesting machines indeed.
    I think this is worded just for your own needs, maybe it would be better and fit the purpose for which it was intended if it read
    F4 2 stroke engines over 104cc ; At some point in the inlet tract(s) between throttle slide or butterfly and crankcase or barrel, the inlet tract(s) shall not exceed an area of 452mm2 (24mm equivalent) in total. For the purposes of measurement, EFI throttle body idle air circuit if any and carburettor air bleed jets and orifices shall be ignored.
    My neighbours diary says I have boundary issues

  2. #122
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    F4 2t rules

    Simple question can I run a 50cc 2t in f4

  3. #123
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    Quote Originally Posted by Skid Mark View Post
    Simple question can I run a 50cc 2t in f4
    You can, but don't get run over.

  4. #124
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    Quote Originally Posted by seymour14 View Post
    You can, but don't get run over.
    club meets but dont think a gp
    i'm over buckets

  5. #125
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    Thumbs up

    only one new rule i would like ,only realy for us heavy weights if people want to play fair , 2 things 190kg+ bike rider combo more cc's or weigh your bike up , i rode regans new bike the other day and was shock horered what 10kg less in a bike on how it feels like there is no bike under you!! you gay light weight riders dont have any idea on how good you have it ! guess you will all be scared pumba , nick, rich, and me and other fast heavey weights would smash you all
    i'm over buckets

  6. #126
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    F4 2t rules

    So have I got it right that the rule states 55cc to100cc water cooled yes so 50cc is not enough to meet f4 class yes or no

  7. #127
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    Quote Originally Posted by mr bucketracer View Post
    only one new rule i would like ,only realy for us heavy weights if people want to play fair , 2 things 190kg+ bike rider combo more cc's or weigh your bike up , i rode regans new bike the other day and was shock horered what 10kg less in a bike on how it feels like there is no bike under you!! you gay light weight riders dont have any idea on how good you have it ! guess you will all be scared pumba , nick, rich, and me and other fast heavey weights would smash you all
    There should be a ban on fat cunts.

  8. #128
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    Quote Originally Posted by jasonu View Post
    There should be a ban on fat cunts.
    Fuck that, the skinny cunts need to ride around with ballast. I ain't going to the gym.

  9. #129
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    Quote Originally Posted by Skid Mark View Post
    So have I got it right that the rule states 55cc to100cc water cooled yes so 50cc is not enough to meet f4 class yes or no
    Your bike will be classed as f5 regardless. The race groups are usually "a" "b" and possibly "c" depending on your lap times. Then your bike is classed f4 or f5 depending on what it is.... hope you can understand

  10. #130
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    Quote Originally Posted by Yow Ling View Post
    I think this is worded just for your own needs, maybe it would be better and fit the purpose for which it was intended if it read
    F4 2 stroke engines over 104cc ; At some point in the inlet tract(s) between throttle slide or butterfly and crankcase or barrel, the inlet tract(s) shall not exceed an area of 452mm2 (24mm equivalent) in total. For the purposes of measurement, EFI throttle body idle air circuit if any and carburettor air bleed jets and orifices shall be ignored.
    Well I tried to word things to leave it as open for experiment as possible. As you'd know, I have no axe to grind - or skin in this particular game.
    If you're inferring that what may result is an airbox/plenum chamber with a 24mm entry, why not ? It's been proved I think that the carb throat size ain't a limiting factor, at least at 24mm.
    Have a look at most kart classes, they have to run a specific airbox - with a couple of small entry holes. Allegedly as an intake silencer...
    The way you've worded it means the carbs which have the restriction either before or at the slide/butterfly won't be legal.

  11. #131
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    F4 2t rules

    So what your saying is a 50cc non comp 2 stroke is to small for f4 So the derbis 49.9 is to small for f4 also and the rs aprilia is also well under class capacity so how is that allowed ??

  12. #132
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    Quote Originally Posted by Skid Mark View Post
    So what your saying is a 50cc non comp 2 stroke is to small for f4 So the derbis 49.9 is to small for f4 also and the rs aprilia is also well under class capacity so how is that allowed ??
    No. What he is saying is read the fucking rules. it is all there.

  13. #133
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    Quote Originally Posted by Yow Ling View Post
    I think this is worded just for your own needs, maybe it would be better and fit the purpose for which it was intended if it read
    F4 2 stroke engines over 104cc ; At some point in the inlet tract(s) between throttle slide or butterfly and crankcase or barrel, the inlet tract(s) shall not exceed an area of 452mm2 (24mm equivalent) in total. For the purposes of measurement, EFI throttle body idle air circuit if any and carburettor air bleed jets and orifices shall be ignored.
    Actually after advice submitted on this thread and by PM, my proposal was worded as best I could to be a very good reflection of the existing rule without changing it but refines the definition of 24mm equivalent to cover a wide range of carburettor types and EFI throttle bodies in an unambiguous way without changing the thrust of the original rule itself. Yours might have a hidden agenda as your proposal restricts things in a way the original rule did not.

    At this point I intend submitting my proposal the way it is and if it is accepted by MNZ you will get a chance to put your views forward on its merits to them in April.

  14. #134
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    Not trying to be rude mark, but you've pointed it out and you still want someone to tell you different?

    F5 is where its at and its legal.
    Don't you look at my accountant.
    He's the only one I've got.

  15. #135
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    Quote Originally Posted by Skid Mark View Post
    So what your saying is a 50cc non comp 2 stroke is to small for f4 So the derbis 49.9 is to small for f4 also and the rs aprilia is also well under class capacity so how is that allowed ??
    When has an Aprilia 50 been allowed to run in F4, it is news to me. I have seen a few 50's in B grade but F4???

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