What's legal ?

[Freakshow]

There is already one built in WA in that configuration and raced.  Never seen it at a nats but I hear it runs successfully at state titles in Wa

[Rossvickicampbell]

not quite Freaky.  There are a couple in WA basically SC500 motor in a YZB frame - completely legal.  And no state titles in WA either - no points racing.  I have riden one of the bikes and seriously it is a gem.  All the advantages of the B handling and with the engine mods on the 500 motor pulls like a tractor forever - god it went!  Well in a straight line with me anyway 

[maico police]

Why not run last place in pre 78 and stick to the rules instead of running last place in pre 75 and breaking them? Why not try Crockets idea and see how good a bike you can make it (for pre 78)?

Cut-off dates are a mind set. I think you can do well on anything if you take the time to set it up properly.

[motomaniac]

Why not run last place in pre 78 and stick to the rules instead of running last place in pre 75 and breaking them? Why not try Crockets idea and see how good a bike you can make it (for pre 78)?

Cut-off dates are a mind set. I think you can do well on anything if you take the time to set it up properly.

Thread killer ! Now what are the boys going to hypothesize about ?

[maico police]

Thread killer ! Now what are the boys going to hypothesize about ?

I dunno. Filling your shocks with lard? Why can't I run my 1989 KX 500 in with EVO 80's? Converting your RM 465 to points ignition......?

* WATER. Cheap, economical and you can get a whole two litres in your gearbox.

[09.0]

Why not run last place in pre 78 and stick to the rules instead of running last place in pre 75 and breaking them? Why not try Crockets idea and see how good a bike you can make it (for pre 78)?

There it is!

[worms]

at some point we are going to wind up having to get our bikes certified because so many want to test the rules for what-ever reason, wake up to yourselves before you turn a great sport into a over-regulated bitch fest. I think we should ban all Y generation riders, they dont know what the word NO means.

[Freakshow]

not quite Freaky.  There are a couple in WA basically SC500 motor in a YZB frame - completely legal.  And no state titles in WA either - no points racing.  I have riden one of the bikes and seriously it is a gem.  All the advantages of the B handling and with the engine mods on the 500 motor pulls like a tractor forever - god it went!  Well in a straight line with me anyway 

funny i thought thats what we were talking about 

[firko]

funny i thought thats what we were talking about 

Iain wants to do the engine swap to an MX-B frame for pre 75, not a YZ-B. That's what the threads about.

[Rossvickicampbell]

and we dont run state titles in WA Freaky.

[Nathan S]

I'd be very surprised if Iain is GenY!

[DJRacing]

I'd be very surprised if Iain is GenY!

  classic Nathan 
Correct me if I'm wrong, it's been awhile since I've read your inch thick rule book but aren't the rules for pre78 era dated, that only bikes and parts from '75 through to '77 allowed to race in pre78?  Modified pre75 bikes  aren't eligible, or am I wrong?
18.5.5.1 Acceptable for the pre 78 classes are machines and components that are limited to the 1975, 1976, 1977 models alone. The only exception to this rule is where the model remains unaltered after this date.
Wouldn't this first rule of pre78 make a SC500 motor illegal for pre78?  And the bike in question (MX-B 500) would in fact have to run in your Evo class     

[DJRacing]

Guys Im not a good rider my normal finishing place is last , Im only thinking about this hot rod as I have all the bits sitting in the spare parts pile . I allready own a Yz 400c and 400d for pre 78 in pre 75 Ive got Mx360 and Sc500 so this would be a fun bike Hence the Legality question . Iain

Iain in my opinion I wouldn't have a problem racing against you in pre75 on a slightly modified 37yr old frame and I like your idea of marring a 500 with a MX-B frame. If you're got the parts and the inclination to do the job then I would rather see another bike out on the battle field than a bunch of parts waisting away sitting in a shed because of a modification to the front engine mount that renders the bike illegal in pre75 and also pre78 and now becomes an out of era looking bike in the Evo class.
I say build your bike and go racing (as you say friendly club meetings) and if people protest over a 37 yr old frame that has been altered to be made even older then just park the bike up (at least you have another rideable machine) and take it to the next classic dirt where it will be a true vintage bike of the true progression of motocross of that time. Where in that era all modifications and different ideas were looked upon as exciting,  innovative and inspirational.
No rules needed here, just good ideas and motivation to try something different...... The progress of Motocross.

[bazza]

DJ you dont need to ask whats legal (you know your legal fish sizes)
Hope your well and alls good in wakavegas(with no H)

[DJRacing]

DJ you dont need to ask whats legal (you know your legal fish sizes)
Hope your well and alls good in wakavegas(with no H)

Wakavegas does have a H though Bazza, I got one in the garage    alls good here mate and looking forward to Fakatane this weekend...... Go the YZ360B
(Sorry for the sideways slide of the thread, back to normal bitching please  )