I love those clamps that Lozza shows but in my opinion, they're not legal unless they are exact copies of period items. Just because the technology was available to build them was available back then doesn't make them kosher. I know I harp on this but I passionately believe that our sport is about preserving the technology and visual image of particular eras of motocross history. Fitting modern styled billet clamps takes away a large chunk of the period integrity of the bike. I get people saying that works bikes had billet clamps back in the day so why can't their bike? My answer is that you most certainly can but the clamps you use must be based off works parts or commercially available parts. In my case I wanted to fit billet clamps to my Cheney project and noticed that ProCircuit made billet triples for Huskys back in '73/'74 and that somebody was making exact replicas of them. I bought a set because of that pre '75 provenance. Fitting clamps (or any other majot parts) with no historic precedence is the stepping stone to our bikes losing their period look and turning into vintage/modern hybrids. Look at the shitfight post classic road racing became because of the "she'll be right" attitude to allowing non period parts.It's all by degrees Firko, it all by degrees. How many chambers, replica frame or suspensions are "exact copies of period items".
It's all by degrees Firko, it all by degrees. How many chambers, replica frame or suspensions are "exact copies of period items".Exact copy is perhaps a little harsh but I think 'reasonable facimile' would be easier to enforce. Nearly all of the aftermarket frames I've seen are pretty corect. I've seen two Metisse frames sitting on a mates floor that were absolutely identical. One was made by the Rickmans in 1964, the other by Pat French in 1999. Geoff Morrises frames are pretty correct to my eye(I'm sure he can verify that himself) and even the locally made Redline and Trackmaster copies are damn good copies, the only differences being the welds. I'm certain the guys who make aftermarket frames could make little geometry changes to 'modernise' the design a little but they largely don't. Why? To maintain that period integrity. Eric Cheney made 'modernised' versions of his period frames and all it bought him was grief. The organisations wouldn't allow them to race in pre '65 and the racers wanted authenticity, so he quickly went back to the original jigs!
firko so those replica pro circuit pre75 triples are okHoleshot, I'ts been a long time since I had any say in what's in the rulebook so I can't say with authority but to my way of thinking they're legal as the originals were around in '73. A friend had an original set on his '71 Husky back in the early days of vintage and I always liked them. When the replicas started appearing I got a set and the'yre pretty damn close. The originals were cast and then machined, the new ones are CNC billet and you can tell the difference in the materials used if you know what you're looking at but they're otherwise identical.
Torrens has it at a massively reduced price ::)
he was going to be my first choice as he has been making parts for vintage bikes since they were new, but then i saw the price and i cant afford to spend $1000 on these and as freaky said, hes not set up for CNC. i should be able to get the CAD done by a friend so then that should reduce costs and then just send it to a CNC place or Lozza?
but yes maybe i could buy some of the alloy off him
(http://i155.photobucket.com/albums/s297/Lozza85_2007/tripleclamp6.jpg)
i dont know why rear shocks are not classed as major components???? they are the main items that make most of the difference on old bikes and many look way more out of place than a set of billet clamps but thats just my opinion.
OK 6061 will be an extrusion of set dimensions in 6m lengths Capral has 6060 T6 which is basicaly the same thing, you can purchase by the metre.