EVO RULES

[worms]

AS THE RULES STAND,16.15.12 Acceptable machines and components: Evolution Class Solo
16.15.12.1 Bikes will be OEM (original equipment manufacturer).
16.15.12.2 Modifications converting later equipment to comply will not be allowed.
16.15.12.3 All components will be of the period the machine was manufactured:
a) No linkage suspension,
b) No disk brakes,
c) Air cooled motors.
16.15.12.4 Carburettors; period flat slide carburettors and any round slide carburettor may be used.
16.15.12.5 Engines and gearboxes must remain externally unchanged.
16.15.12.6 Exhaust may be modified but must follow the original lines and be fitted with an effective muffler.
16.15.12.7 Folding footrests must be fitted.
16.15.12.8 Countershaft sprocket covers will be fitted.
16.15.12.9 The handlebars must be equipped with a protection pad on the cross bar. Handlebars not fitted with a cross bar must be equipped with a protection pad located in the middle of the handlebars covering the handlebar clamps.

WHY OH WHY CAN IT NOT JUST READ, ALL MACHINES MANUFACTURED, 1978 TO 1985.

The word " PERIOD" is used but not defined, "16.15.12.4 Carburettors; period flat slide carburettors and any round slide carburettor may be used"  we should all work at getting your clubs to set a period for EVO before any more rule changes, seems easy to me.

[Simo63]

AS THE RULES STAND,16.15.12 Acceptable machines and components: Evolution Class Solo
16.15.12.1 Bikes will be OEM (original equipment manufacturer).
16.15.12.2 Modifications converting later equipment to comply will not be allowed.
16.15.12.3 All components will be of the period the machine was manufactured:
a) No linkage suspension,
b) No disk brakes,
c) Air cooled motors.
16.15.12.4 Carburettors; period flat slide carburettors and any round slide carburettor may be used.
16.15.12.5 Engines and gearboxes must remain externally unchanged.
16.15.12.6 Exhaust may be modified but must follow the original lines and be fitted with an effective muffler.
16.15.12.7 Folding footrests must be fitted.
16.15.12.8 Countershaft sprocket covers will be fitted.
16.15.12.9 The handlebars must be equipped with a protection pad on the cross bar. Handlebars not fitted with a cross bar must be equipped with a protection pad located in the middle of the handlebars covering the handlebar clamps.

WHY OH WHY CAN IT NOT JUST READ, ALL MACHINES MANUFACTURED, 1978 TO 1985.

The word " PERIOD" is used but not defined, "16.15.12.4 Carburettors; period flat slide carburettors and any round slide carburettor may be used"  we should all work at getting your clubs to set a period for EVO before any more rule changes, seems easy to me.

How about a slight change Trev to ALL MACHINES MANUFACTURED, 1978 TO 1985 that were originally manufactured with all the 3 elements of drum brakes, non linkage suspension and aircooled motors

[Graeme M]

If you want Evo to be period based, and who wouldn't, then all you need to add is a rule immediately before 16.15.12.1 that reads "Only motorcycles manufactured prior to 1 January 1985, and sold and marketed as models in the period prior to the 1985 model year, will be eligible for competition in this class".

[SUZUKI311]

I think Simo has probably the easiest fix I have seen, along with being the easiest to interpret.

[FourstrokeForever]

AS THE RULES STAND,16.15.12 Acceptable machines and components: Evolution Class Solo
16.15.12.1 Bikes will be OEM (original equipment manufacturer).
16.15.12.2 Modifications converting later equipment to comply will not be allowed.
16.15.12.3 All components will be of the period the machine was manufactured:
a) No linkage suspension,
b) No disk brakes,
c) Air cooled motors.
16.15.12.4 Carburettors; period flat slide carburettors and any round slide carburettor may be used.
16.15.12.5 Engines and gearboxes must remain externally unchanged.
16.15.12.6 Exhaust may be modified but must follow the original lines and be fitted with an effective muffler.
16.15.12.7 Folding footrests must be fitted.
16.15.12.8 Countershaft sprocket covers will be fitted.
16.15.12.9 The handlebars must be equipped with a protection pad on the cross bar. Handlebars not fitted with a cross bar must be equipped with a protection pad located in the middle of the handlebars covering the handlebar clamps.

WHY OH WHY CAN IT NOT JUST READ, ALL MACHINES MANUFACTURED, 1978 TO 1985.

The word " PERIOD" is used but not defined, "16.15.12.4 Carburettors; period flat slide carburettors and any round slide carburettor may be used"  we should all work at getting your clubs to set a period for EVO before any more rule changes, seems easy to me.

How about a slight change Trev to ALL MACHINES MANUFACTURED, 1978 TO 1985 that were originally manufactured with all the 3 elements of drum brakes, non linkage suspension and aircooled motors

Seems like a very easy fix Simo. Well thought out and simple enough.

Will it, however, allow the use of pre85 big bore air cooled motors from manufacturers other than Yamaha to be used?

[Ted]

Yep. Maico and Husqvarna

[allan hughes]

ffs evo is not based on year models
if you want a rule change
approach your club
your club sends it to your state  sub committee
and then to ma . ffs ffs ffs  ftw al

[Nathan S]

So you're happy to race against 2015 model Evo bikes E-YZ?

[PEZBerq]

We race Classic MX.  While Evo is a technology class it must still be a subset of Classic and not sit outside. If it is not Classic then wtf is it doing in our MOMS section?

Rules for Evo should therefore respect that the machine must be classic. Classic can only be defined by an era not by technology. Simo's idea of Pre 85 is as good a line to draw in the sand as any in my opinion. Don't see any need for having the other limitation on age e.g 78.

A pre 90 hot rod Revo class would be fun. Anything goes as long as it is twin shock, air cooled, drum brakes and pre 90. Not sure how many people would want to build something however?

2015 PDS suspended hybrids are not Classic. A pig with lipstick is still a pig! No one wants to kiss a pig.

[evo550]

How about,
(1) Machines built in 1978 or later that where originally manufactured with drum brakes, air cooled motor and non linkage suspension.
(2a) All non original components fitted must be from other machines or aftermarket manufacturers that comply with rule one.
Or.
(2b) All non original components fitted may be from a machine or aftermarket manufacturer that does not comply with rule 1, provided machine maintains the rule 1 criteria.
Two rules, one sets the standard, rule two clears up the modification confusion.

[PEZBerq]

Classic criteria needs to be included in my view. Otherwise the category should be called Retro and not included in the Classic MX MOMS. Include it somewhere else.

[worms]

guys, I don't think we need anything other, ALL MACHINES MANUFACTURED 1978 TO pre 1985, because when you add on 16.15.12.3 All components will be of the period the machine was manufactured: ie the machine can be made up of components from that era/ period, 1978 to  pre1985.
a) No linkage suspension,
b) No disk brakes,
c) Air cooled motors.

there is no loop holes, easy to understand, EASY TO IMPLEMENT.

[Bamford#69]

Hi Yes ,
1 , No linkage suspension,

2 , No disc brakes

3 , Air cooled motors

All major components must be from an Evo Eligible Bike,   

Or is this too simple ,

Ps, I now have  an Evo bike  ,

cheers

[John Orchard]

Hi Yes ,
1 , No linkage suspension,

2 , No disc brakes

3 , Air cooled motors

All major components must be from an Evo Eligible Bike,   

Or is this too simple ,

Ps, I now have  an Evo bike  ,

cheers

I tend to agree but the 'grey area' is then - define "major components".

[Nathan S]

There's a generally accepted (but not officially defined) understanding that "major components" are:
Frame;
Swingarm;
Triple clamps;
Forks;
Hubs;
Brake backing plates;
Engine cases, barrel, head, clutch cover.

Some may argue whether brake plates and/or triples should be on the list, but you won't get much debate beyond that.