In Reply to: N and R's posted by bubba on October 15, 2000 at 20:33:11:

The Later N's aka series 3 1983 and newer are OK, and the R5/6/7 but I have my doubts on the 50/60/70's as Deutz was involved and parts are limited for some things if not totally unavailable. The N/R 5 have the smaller cage and engine and the N/R6 &7 have the same cage but the 6 has the smaller engine and grain tank. The R is a better choice if you can find it because they slowed the engines down for longer life on the 5's and 6's. The N's ran at higher RPM and needed rod bolts and bearings changed atleast every 3000 hrs.