Husky61 mentioned the 390 and 420 auto Huskies.
In 1978 I trade my IT250D in on a shiny new 390 AMX after seeing Porky Eldridge on his auto Husky at the Cessnock 4 Day over Easter that year. I got it registered (those were the days when registering a MX bike was fairly easy) and rode it for the next 3 years in a variety of enduro events ranging from desert races in Broken Hill (where I lived) through to a couple attempts at the 4 days. In deep sand in the desert races it was not so good as the trannie offten could not make up its mind on what gear to be in and would continually change gears, gennerally between 3rd and 4th. In the tighter, east coast enduro that I rode, it was brilliant, and it was my riding abilities that let me down and saw me not finish an event in two years. The tranny was not up to the longer events like the 4 day, as gennerally towards the end of two days riding the tranny would start to "slip" in first gear, especially if there was a lot of tight going and hills (Cessnock). For the 79 and 80 4 day's, I had organised a spare tranny that I intended to fit during the 10 minute work period at the start of day 3, I had it down to about 8 minutes to do a full tranny swap, however I retired on the 2nd day in both events.
I still have the bike, the engine has been in pieces in a box in the shed for the last 25 years and the frame is fitted with a 500 Yamaha engine. I intend to get the old girl back together again one day, and have bought another frame so I can still have the 500 engine in a husky frame and use the original frame for the rebuild.
During 1978, my cousin bought a 360 H6 Montesa and a friend of my older brother had a 78 GS400 KTM. I rode both these bikes in a couple of events and the Monty was great in the tight and hilly going and the KTM was the typical mixture of awesome and scariy in the desert races as we would gear it for about 100mph flat out in top. My older brother bought the KTM from his mate in 1980ish and it has lived in his garage for the past 25 odd years with out being ridden. I have been trying to talk him into giving/selling it too me for years, but he still hasn't come around, hopfully next year he might relent!
CJ