Hello all iam hoping someone will be able to help me to id my ossa which i think is a 74-76 250 mar.

The problem i have is after reading most of your posts iam a little confused.

the frame number is B-231454 and the engine number is M-223282

i realise that they do not match but i have read in your posts about some frames which are zinc plated

my frame is but has a side stand and the frame number i was wandering if my frame was a whitlock

i do hope you can help

regards oggy132

Frame/engine numbers starting 22 or 23 are from a 74-76 MAR 250 which are known as the MK2 models. If it is '76 it will be an early one as in '76 they changed to the MK3 which had a different number prefix, laid down shocks, longer forks.

Engine/frame numbers matched from new but obviously in 30 odd years some have had engine swaps. It's still a MK2 engine in a MK2 frame.

Yours will be an Ossa frame that has been plated which was something some owners used to do back then. A Whitlock frame wouldn't have an Ossa number - unless someone restamped it. Whitlock frame doesn't have a sidestand, rear brake lever/spindle assembly is different from Ossa and the rear spindle slot in the swingarm is open at the end allowing the wheel to be removed without removing the spindle.

cheers woody that clears a few things up for me but still a bit confused.

all the 250 mar's i have seen on the net seem to have the rear brake on the right

and the drum on the left but they are both on the right on my bike does this mean

that the rear wheel is off another bike.

Yes, that won't be a MAR wheel if the sprocket and brake are on the same side.

I've changed a couple of mine to use a Gripper style Grimeca rear wheel as it means a rod (or Yam style cable) can be used from the pedal direct to the rear brake arm. This dispenses with the tortuous standard arrangement of spindle and cable.

Here's a link to a site with some useful info

Mats Nyberg Ossa website

thanks woody i will take a look after hope the site can help as i have a 1000&1 questions to ask

over the next few months/ years hope you dont mind me moithering to much many thanks oggy132

a new boy to ossa