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

[husaberg]

I think he means wording of the rules rather than physical measurement.

In terms of plug, how does one deal with odd shaped inlets?

With the AMA restrictor it was a simple go or no go.

[Bert]

With the AMA restrictor it was a simple go or no go.

Quite flexible then? Or is everything round?

[mr bucketracer]

That will get a few excited...

make it you have to run a 45mm carb , no smaller , and the intake to handle it

[Grumph]

Put a semi colon after 104cc : then capital At....and it makes sense. 24mm equivalent in brackets after the sqmm figure...

Why not put up a second version which has no restrictions on the inlet tracts. Get MNZ to poll licence holders as to which goes forward...In theory the remits are supposed to be circulated for discussion before the AGM so if it's in on time it's workable.

And ignore Husa - that bloody S has become his mission in life. It can stay as it is thanks.

[husaberg]

Quite flexible then? Or is everything round?

Pretty sure the rules specified a round hole "X" diameter. KISS

[Grumph]

Pretty sure the rules specified a round hole "X" diameter. KISS

You will no doubt have noted the tract(s) - I at least am thinking of twins, one gauge won't fit all.
Also a lot of the std Keihins are oval throat as well as others.

[husaberg]

You will no doubt have noted the tract(s) - I at least am thinking of twins, one gauge won't fit all.
Also a lot of the std Keihins are oval throat as well as others.

As Rob said he wanted to clarify the measurement procedure.
I feel Two gauges is still easier. KISS
Besides we could just get rid of them if they don't fit my one gauge idea

[Grumph]

As Rob said he wanted to clarify the measurement procedure.
I feel Two gauges is still easier. KISS
Besides we could just get rid of them if they don't fit my one gauge idea

Bugger that - if I've got to build a restricted inlet tract it's going to be as hard to verify area as i can make it. Formula for the area of an ellipse anyone ?

[husaberg]

Bugger that - if I've got to build a restricted inlet tract it's going to be as hard to verify area as i can make it. Formula for the area of an ellipse anyone ?

Hence my KISS round bungy thingy, saves on potential arguments. Its surprising how many people can't actually read a vernier.

[Grumph]

Hence my KISS round bungy thingy, saves on potential arguments. Its surprising how many people can't actually read a vernier.

You actually think I'm going to make it so that a vernier can reach the restriction ? I've got bore gauges and i'm damm well going to use them....

[husaberg]

You actually think I'm going to make it so that a vernier can reach the restriction ? I've got bore gauges and i'm damm well going to use them....

AMA tech bulletin 78-1

Cameron covers it thoroughly in TDC 1
Plus in performance street bike handbook were this attachment came from
https://books.google.co.nz/books?id=...2078-1&f=false

https://books.google.co.nz/books?id=...2078-1&f=false

[Yow Ling]

Formula for the area of an ellipse anyone ?

A =pi × a × b

[Yow Ling]

Or remove said carb size rule all together and then said newbie doesn't have to get his knickers in a twist over rules and comes racing....

This is probably the most simple solution

[TZ350]

Put a semi colon after 104cc : then capital At....and it makes sense. 24mm equivalent in brackets after the sqmm figure...

Proposed MNZ rule 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, 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.

[husaberg]

Proposed MNZ rule 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, 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.

http://www.kiwibiker.co.nz/forums/sh...post1130945850