RM125B incl spares.

[JohnnyO]

Wow.. you guys are confused!

[Ted]

Confused.......Enlighten me

[Noel]

yep I'm confused,help us out

[JohnnyO]

All the aftermarket alloy swingarms are legal, most of them (DG, Thor etc) were available in '76. There are now copies of these swingarms available that are also legal. It seems the only alloy arm not legal for the RM125B is the optional Suzuki arm which was available mid '77.
MA for some reason known only to them have not approved the optional arm, apparently the dated parts book is not enough proof! WTF??

[Noel]

what about Novation arms where to they fit in

[JohnnyO]

Personally I don't think they are right for pre '78, none of them look like a swingarm from the era but i guess it's up to the scrutineer at the meeting to make the call..

[Ted]

Thanks Johnny.........I am definitely going to MA now. I will post up their response as soon as they open their doors after Xmas

[Noel]

Thats what I thought,
I have never seen any concrete information that says MA do not approve the optional "B" arm
does it really exist or has it Just become an urban Myth carried over from an altercation with a misinformed critic of the day

[JohnnyO]

I know from talking to Dave Tanner that the Suzuki optional alloy swingarm was not approved. If they use their common sense that swingarm should be legal but then you will get people trying to use the '78 C model arm which is not quite the same.

[SON]

This thread is evidence of what is broken in Vintage MX.

[Montynut]

I know from talking to Dave Tanner that the Suzuki optional alloy swingarm was not approved. If they use their common sense that swingarm should be legal but then you will get people trying to use the '78 C model arm which is not quite the same.

I am not sure but I seem to remember that one of the debates on here indicated that while the alloy arm was shown in the parts book it was not actually available until very late in the 'B' model life if at all.

Listing things in a book would seem concrete evidence unless the arm was not actually available to most riders. I can remember seeing at least two on bikes while I had my 'B' model back in the day but I did keep that bike into 1978 so can not be certain when it was I actually saw the swingarm in use.

I do think that a genuine 'B' optional arm should be legal but then we would have a heap of RM125C's without swingarms and the 'C' would need to be modified and that would not be legal under the current rules.

Sorry Ted still need to paint it black then All that complex polishing wasted

[Ted]

With the evidence I have attained I am 100 percent certain I will come away with a positive result.

From what I have ascertained from this forum is that NOBODY  has ever formally challenged the powers that be.

It was made in 1977, It was sold in 1977 and it was raced in 1977 . Pretty forking simple

If you wanna use a C model arm, go ahead at your own peril

[09.0]

It's funny where this argument will pop up!
I have less of an opinion now than I used to on this subject.
The parts book that is a reference is dated in December. Everybody knows that the next year model is introduced the previous year. The c model would have been well and truly out by then. If it was dated in say, May,you would have a better case.
How many GENUINE arms are out there? How many will be modified c arms? Maybe it's not that big of a deal.

This thread is evidence of what is broken in Vintage MX.

I think you are looking at it too hard. If that is the case, lots of things are broken in vmx. It depends on your attitude towards it imo. There are lots of grey areas in vmx, but in general it works and works well. In most cases its the humans with their own agendas that try and stuff it up.

[SON]

090 your are correct on both counts,
I had the B and clearly remember the day I picked up my new C,
The alloy arm makes bugger all difference to the performance,
But to a Human and his agenda Well !!!
I remember turning up at Amaroo with 2 almost perfect rare machines and being made to start rear of the grid and then have them stoned to death before I made it to the first corner,

[TM BILL]

what about Novation arms where to they fit in

Dont know but it aint Vintage MX