Patchwork Montesa

[Tahitian_Red]

I'm trying to piece together a '74 Montesa VR.  Are there bits from the V75 and VA that will work on the VR?  Thanks!

[mx250]

I'm 98% certain wheels (brakes etc) and all engine bits swap. VA cases are the same but VB onward differ. I'm 90% certain the tank swap although there are small differences like breather position etc. VR are also slightly smaller than VA or VB.

I don't know if improvements were made with porting or compression etc for performance increase over the models.

Check to confirm all the above.

I have an original bore 360 barrel and head that will go straight in there if you are interested 

[mx250]

Here you go Red,

http://autos.groups.yahoo.com/group/MontesaGroup/?yguid=302718682

Follow the links and you might find out more.

A piccy of the VA....



the V75...



and again....



the VR....



and the VR again...



The first VR has a slightly different tank with the mounts on the side rather than the top.

[cappra]

V75 had very slight porting changes to let the engine hit peak power lower in the rpm range.  VA 250 eliminated the exhaust bridge, with a large oval shaped exhaust.
Everything else will interchange between the three models.

[Tahitian_Red]

Well, I have the front end from triple-clamps through front wheel assembly, motor, rear wheel assembly, tank, seat and misc. bolts (axles, pivot, motor mounts).  I have a line on a frame, but not sure if that will pan out.

 

Any problem areas I should look for on a used (73-74) frame?