1972 – The 47th edition of the Six-Days was held in Czechoslovakia, in Jelenia Gora in Bohemia, from l1th to 16th September in a festive atmosphere.
In the wake of a great world performance, off-road enjoyed a huge following among the population of Czechoslovakia, who enthusiastically welcomed the 390 riders entered, a record attendance as well as the public to follow.
An unprecedented crowd was spread out along the way with an ever larger international audience, which highlighted the golden moments for World Enduro.
The test was, as always, very challenging and at the end of the third day there were already 111 retired riders, which rose to 186 at the end of the week.
As proof of how competitive spirits had become, the acceleration test test with a sound level meter, introduced in 1971, penalised a good 97 of the machines.
Italy, which had somewhat drastically opted for the modern two stroke machinery, arrived on the scene with three of the most talked about bikes of those times: KTM in the Trophy, Puch and SWM in the Silver Vase but only one team could worry the rich parade of Jawa officials who lined up for the occasion all their best men, unfortunately without the injured Masita, and that was the equally fearsome MZ and were favoured by all the pundits.
However, already at the end of the first day a deep wound to the arch of the eyebrow put Salewsky out of the race and paved the way for the Czechs Jaroslav Bříza, Petr Čemus, Češpiva Zdenek, Josef Cisar, and Josef František Mrázek Fojtík who easily took the Trophy, with the DDR MZs right on their heels up to the very last.
The third place went surprisingly to the Italians Elia Andrioletti, Emilio Capelli, Arnaldo Farioli, Bruno Ferrari, Francesco Foresti and Carlo Rinaldi, the key riders of the KTM team which included some 40 official bikes.
In 4th position came the Soviet Union followed by Germany, 6th position went to the USA, 7th came Great Britain, Holland in 8th place, Poland 9th, 10th Sweden, 11th Finland, 12th Spain and 13th Sweden.
The first and second places in the Czechoslovakia Silver Vase closed the competition and left no questions about the capabilities of the hosts. Right behind the winners were once again the DDR on their MZs, followed by Sweden B, 5th position Germany, 6th Italy B (Sergio Belussi, Bernardino Gualdi, Alessandro Gritti, Carlo Paganessi, on Puch), 7th the Soviet Union, 8th Great Britain A, France 9th, 10th Italy A (Pasquale Bernini, Gualtiero Brissoni, Giuseppe Signorelli and Fausto Vergani on SWM), 11th Germany B, 12th the USA B, 13th Holland, 14th Austria, 15th Sweden, 16th Poland A. 
Another form of "implementing regulations" saw the light on this occasion - the Team Manager followed the best adversary riders, cameras in hand, to catch them in the act of unauthorized assistance and then disqualify them. As in all fields, the growing competitiveness led to the development of practices that were themselves at the limit of legality, to combat competition.

1973 – The ISDT crossed the Atlantic for the first time and landed in the USA, in Pittsfield, Berkshire county  in Massachusetts, although the start and finish was made from Dalton.
The choice was as innovative as it was disastrous because the 47th edition running from 16th to 22nd September was ruined by furious arguments, some obscure episodes and odd regulations judgements.
Accomplice was also the absolute inexperience of the commissioners who even forgot to open the parc ferme one morning.
However, eighteen nations took part with 303 riders of which only 125 managed to finish.
From the start the local favourite was the Rokon company who participated with one of their teams (Jim Simmons, Gary Snider, Jim Fogle) on the saddle of an innovative if complicated machine ‘Made in USA’ known as the 340 TCR Automatic Enduro and equipped with a Sachs 335cc engine used on motorised sledges with a pull start, automatic change, shaft drives to both wheels, spoked magnesium wheels capable of carrying water or fuel, disc brakes and many other innovations: in the long run however these proved inferior to the conventional bikes.
An important modification to the regulations was introduced in this new season which allowed the use of foreign production bikes also in the Trophy competition.
There were still 6 riders to a team riding in three different classes and 4 riders in the Silver Vase in two different classes.
Thanks to this change, for the first time since the second world war there was an official French team present with six riders in contention for the international Trophy, Joel Queirel and Jean Louis Figureau - Monark 125, Christian Rayer - Monark 175, Christian Huguet - Ossa 250 and Charles Coutard - Bultaco 250.
There were another two teams in the Silver Vase: France A (Vernier, Gendre, Juigne and Titaire) and France B (Thomas, Baillard, Lutz and Chaligne).
All fought graciously with grit and enthusiasm but without realising ambitions to finish among the leaders.
The gigantic organisational apparatus instigated by the Americans which spared neither men nor machinery allowed space for hope but right from the start the event was beset by outrageous problems.