What bikes are eligible for what classes

[Nathan S]

My way of thinking is that Evo is basically the 78-81 period, Husky made Twinshock bikes til 84 but they were 81 technology ....

Right - that's useful input right there.

Would it be fair to describe Evo as:
"A class for pre-85 bikes that use the technology that was common until 1981"?

[JohnnyO]

My way of thinking is that Evo is basically the 78-81 period, Husky made Twinshock bikes til 84 but they were 81 technology ....

Right - that's useful input right there.

Would it be fair to describe Evo as:
"A class for pre-85 bikes that use the technology that was common until 1981"?

I think it's fair to call Evo the last of the twinshock/non linkage air cooled drum brake bikes. The end of an era.. trouble with saying 81 technology is Kawasaki, Suzuki, Honda and Yamaha had single shock and or water cooling by then..

[Nathan S]

Correct me if I'm wrong:
Before 1981, the only vaguely common bikes that didn't meet the drum/air/no linkage criteria was the 1980 KTM125 and the 1980 KXes?

[JohnnyO]

Correct me if I'm wrong:
Before 1981, the only vaguely common bikes that didn't meet the drum/air/no linkage criteria was the 1980 KTM125 and the 1980 KXes?

Yes with the KXs, I think the 125 KTM was still air cooled til 81.

[Nathan S]

OK.

Ignoring the 1980 model KXes for the moment:
Evo is pre-81, but with allowances for certain pre-85 bikes.

Anyone disagree with that?

[JohnnyO]

OK.

Ignoring the 1980 model KXes for the moment:
Evo is pre-81, but with allowances for certain pre-85 bikes.

Anyone disagree with that?

Pre 82 Nathan, maico mega 2 and YZ465H and KTM Twinshock are 81 models. Defining it ins year cutoff brings 81 single shock rm, cr and kx's into the equation and loses the twinshock air cooled category..

[Nathan S]

Pre-81 doesn't catch anything we don't want, apart from the '80 model KXes.
The 81+ bikes that we DO want fit into the "certain Pre-85 bikes" bit.

I'm just kicking around ideas of how to cleanly exclude YZ-L forks, Simons USDs, etc. Defining it as "Pre-81 plus some" seems like the best way to kill off those things (and the SexMax).

[JohnnyO]

Ok all good..

[Canam370]

"Pre-81 plus some"

Uh huh. Now the fuzzy bit starts which got this whole thread started.

[JohnnyO]

"Pre-81 plus some"

Uh huh. Now the fuzzy bit starts which got this whole thread started.

I'm waiting to see what he comes up with before commenting..

[09.0]

That's why there isn't a date on it. Can't be done.
Piss off the oem bit and the converting later equipment to comply bit.
Put in
Bike must be air cooled, drum braked and twin shock.
Converting a water cooled and or disc braked and or single shock bike to comply is not allowed.
Using parts from a water cooled and or disc braked and or single shocked bike is not allowed.
Also maybe that bikes must have been manufactured from 1978 onwards to comply.

[JohnnyO]

Bike must be air cooled, drum braked and twin shock.

twin shock/non linkage
Got to cater for those YZ's

[09.0]

Bike must be air cooled, drum braked and twin shock.

twin shock/non linkage
Got to cater for those YZ's

Yeah I actually wrote that first time then the internet dropped out wiping it all. Missed it second time around.

[JohnnyO]

The first few years of Evo, 93-96, it was actually called twinshock and there were no YZ's racing then '97 it was renamed Evolution after the class of the same name in the US.

[oldfart]

Brad - this is where it all turns pair shaped ..... if you allow air cooled motors from linkage bikes, they will say why not the forks and TLS brakes that go with it.   Oem  and converting is in for that exact reason.

No Forken  way hosay