OW27.

[mainline]

Firko/DJ, could it be Glover's bike?

[Nathan S]

The VMX article said that the OW27 ran up until 1980, but it was continually evolving over the years.

In order of age:
Terry Good's ex-Hannah bike;
The one in mposs' article;
Gerard Rond's one in VMX;
the one in Firko's pics.

I'm aiming for something around the 77 Hannah bike and the 77 Rond bike.

[firko]

Nathan the bike I posted is supposed to be a '77 model as well and it's very different to the Tery Goode bike which is different to the Rond bike. Could the factory have had so much variation in the one year?? I suspect the bike I posted may be a '78 model. Works bikes were always evolving and if I were building a replica I'd find the common denomiators like the tanks and side covers and possibly the frame and build the rest using whatever looked closest as you eluded to doing in an earlier post. Works bikes were never an exact science anyway so  bit of chop and change won't detract from what you're aiming at.

[BETRIC]

Firko I am bringing to CD5 the road registed Cooper, the bling MX Cooper, a full set of XR75 4 speed models (K0 to K3) and a nice unrestored 1973 MX80 for show and tell, plus a XR75 K4 pit bike and the RM250D to ride, should also have on show a very nice 76 XT500 with less than 3000km on it, a 78 CR250R and some other bikes???

[Maicojames]

The Terry Goode bike represents a 1976 OW27, the one that Hannah beat Marty Smith on for the 76 125 series-even has the #39 on it. So...after seeing the pics in 77 MXA too, that would be more representative of an OW27 raced in 77. You are on the right track for sure. A period aftermarket swingarm made to look like the works unit would be better, JMO.

James

[DJRacing]

Nathan, its going to be a case of mix and match(just like the factories did in the day). I was on the understanding that "the Hurricane" got the euro '75 model OW for the '76 winter series until the infamous claiming rule scared the shit out of yamaha and they shipped the bike away.
 Anyway, with all the variations of the OW27, it will be in your favour when you build the bike.