A very nice example of a 1974 SF 750 up for sale

[Tippie]

So 100/80 18 then. Still lokks odd to see that much light under the mudguard then.

My SF2 came new with a 3.50 Metzeler "Rille" front tyre (Metz C66 4.00 on the rear), the front size would have looked like that.

 

[78jotadave]

The seller accepted an offer, not mine, and the sale is pending.

 

[Davo]

I am likley to be doing one for an 80 Jota, very soon, so what are the mods?
CLEM

No mods. Just shape a washer of suitable thickness to fit and weld it in place.