Hi John I might be late in replying to this post but I have just replaced the belt on my Little John lathe.
After a lot of searching I contacted George Lodge and Sons Ltd 01482 329553 and spoke to Dave Fuller, he was very helpful full. The original belt was apparently made for Raglan and looked like a wide Vee belt the dimmention are outside circumference 31.5 inches x 7/8 x3/8 thick the replacement is VSB 22 x 8 x 725. £33_00 However if the motor and mount is non standard be carefull that the motor spindel center is as per handbook. Although l have my had my lathe for 40 years I noticed that the belt was rubbing on the operating forks at certain speeds. The motor was to low and I made a modified mounting plate and spacer so I used a longer belt VSB 22 x 8 x 725.this solved the problem and the lathe runs very well. I also had to modif the motor operating fork. The speed range 1500 rpm to 300 rpm but this is proberly be cause the motor pulley was missing when I first obtain the lathe and I made my own but did not have access to any dimensions. If you require any more info let me know.
Regards Pete