Classic cars forum & vehicle restoration.

[cc rider]

Hi all
I have a triumph 250 L 2/1. at least I think I have. No 2 pictures I have found of it look the same. mine is emerging from a box of bits. Engine no. 1.L6.2025. & gear box (a 350 model I believe) TE94642
ideas anyone? have tried here in australia.

[Uncle Joe]

Part of the reason that no two pictures look the same is the way that Val Page designed this bike. His idea was to rationalise production, so the design allowed for the use of the same parts on the 250, 350 plus one other engine size, possibly the 500, but I'm not sure. So therefore, even if your gearbox was originally for a 350, it is still the correct box for a 250.

I believe that Triumph made a loss on every 250 that they made, due to it being a little overengineered to suit the design parameters. The 2/1 was a succesful competiition machine.

In 1937 this bike became known as the Tiger 70.

Hope this helps!

[cc rider]

thanks UJ
The difference in gearboxes has been the clutch hub needed to be machined out to allow for the larger 350 mainshaft & the top gearbox mounts are narrower then the 250 ones & I had to put spacers in. The sprocket spline is larger then the 250 & smaller than the 500. All good fun!I picked up a rear wheel at a swap meet on saturday - it seems to be suitable (spoke count & wheel hub are ok) but I'll need to fabricate a new brake drum as the one on it is too small. Am I right in thinking that maybe a lot of Britsh bikes have very similar parts & that they may be adaptable.
Does anyone know what grade of metal I should be using to machine a new brake drum?
cheers
cc