pre 75 frames

[piston]

I see a few comments re pre 75 sidecar frames ,

 I recall a in south australia some years back when Walter turned up with his STING, And there were some eligibility issues. After wich he nominated for a position on the VMX committee.
there then was a rule stuck in the GCR's were (any frame is eligible for pre75.)
the club here had some issue's with a member who choose the threat of legal action against the club because they did not believe His 80's Wasp was realy pre 75eligible.
the commission support the fact in writing, that any frame is eligible


So I geuss that frame and swing arm mod's are quite with in the rules

[Tim754]

 Piston perhaps a study of the rules would reveal that "any frame" is referring to a converted "road bike" frame of that era. Prior to 1973 most MX sidecar frame cradles were either modified road bike or one off hand made specials as factory frame makers were even rarer than now!, also there is/was a list frames that excludes some later factory designs for Pre75 in the MoMs. Please be remembering the set limitations on suspension travel and shock types for Pre75 and pre68 , this is the area that needs to be scrutinised much more thoroughly.  I use a stock 1971 model CB750 frame cradle and swing arm ,having only extra road fitting brackets removed. To that I have now re engineered an early Wasp front end to fit up to the standard 754 head set. This is also fitted with a heavy CB750 disk brake. Cheers Tim754 
Manual of Motorcycle Sport 2010, pages 169/170 starting at 18.9.0.1 deals exclusively with VMX sidecars and of course any general suspension /machine regulations for Pre75 were applicable.

[piston]

Hi Tim, I was also surprised when the letter from MA commission ( Mick Downing) comfirming the eligibility of the 80 Wasp frame (modified travel) the rule does however say (preformance parts exept frames must be pre 75).