square barrell maicos in pre 70

[paul]

whats the rules for squaries in pre 70 /and do later one s 71/72 comply

[firko]

The rule has traditionally been "all square barrels with oval cases". Fit early die cast oval clutch and ignition cover to your '70/'71 model and you're ready to go. Having said that, I've seen Maico's racing in pre '70 at a national level still fitted with later sand case covers and nobody seems to give a toss.

[paul]

thanks firko  what about front hubs?

[firko]

thanks firko  what about front hubs?

As my old Dad used to say "Do as I say, not as I do". My 350 squarie (and it's 250 mate, since sold) raced in pre '70 from 1988 right through the 2006 Nats with a conical front hub and was never pinged in scrutineering. The 350 also has an AW alloy back hub and an alloy Boyd and Stellings swingarm that's been on the bike since 1992 and once again the bike was never knocked back in scrutineering or protested in its life until word got to me that a certain WA racer had planned to protest the bike because of the hubs and swingarm if it beat his son's BSA in pre '70 at the Coffs Harbour Nats. As it happened, my rider forgot to turn the fuel on in the last moto and was late away, finishing second behind the BSA and wiping the need for Mr Lawson to protest.

My belief is that by the letter of the law my bike is indeed illegal because of both hubs being from post 1970 Maicos. I have paperwork to prove the swing arm is Kosher though. When the bike returns next year it'll have a Yamaha MX125 full width front hub and a steel rear hub. The Yamaha hub DNA can be traced back to the sixties so it's legal. I believe that the Maico conical front hub is illegal for pre '70 but, like the sand cast cases, I've seen many a Maico compete in pre '70 fitted with them. To play it safe and adhere to the letter of the law, I'd be using a full width Maico front hub if I were you Paul.

[Nathan S]

Firko, if you start calling it an AT1 front hub, you'll save some raised eyebrows. The 248 prefix cast into the MX125 hub shows that it is a carry over from the first AT1.

The 248 hub is, as you say, a very slight variation of one used in the very early 1960s and could reasonably pass as a legal pre-65 component - but there's zero doubt that it is 100% legal for pre-70.

[firko]

Firko, if you start calling it an AT1 front hub, you'll save some raised eyebrows.

Good point Nathan . They're a great little brake with almost exactly the same braking area and mechanical action as the standard setting Yamaha conical hub.