Guys i stand corrected on the internal DR of the E4FS
I got one who was fitted with a middle poelie 17 and dif poelie 34.
I just looked into the manual of the E4FS and found out that standard you have a 18 teeth mainshaft poelie and on the middle shaft for the front belt you have the same 18 teeth poelie.
The diff poelie is still 34 teeth.
So the internal DR of the E4FS is 34 devided by 18 is 1.889!!!!
Keep this in mind if you find the correct FDR
If you want it to be DR 2 then you have to use part number 503236(this is 17 teeth) to get the DR of 2.

cheers Roy