If it has a load of braided fuel lines coming out of the air box ad into the head then it's a K-Jet, if not it's a Digifant. 87 E reg could well be either as this is around when they changed. My old White MKII was a cross over model and was a bit of mismatch of parts, was a nightmare when I tried to get bits as GSF wouldn't believe it was digi!
Nick