seconds and a standing time of 11.9 seconds at . This was the first bike ever in Cycle Worlds tests with quarter mile time under 12 seconds. Sales of the Dunstall Nortons declined in the 1970s and Dunstall concentrated on Japanese marques, in particular forging strong links with Suzuki. The Dunstall Suzuki CS1000 was road tested in 1979 by Motorcycle News, with being the fastest top speed they had achieved on a road-legal production motorcycle.Dunstall CS1000 Bonhams sale archive, 29 April 2007. Retrieved 29 December 2020 Motorcycle News' 1980 table of top speeds listed the CS1000 as number one and Dunstall Suzuki GSX1100's at two, followed by the Moto Martin CBX at three. Eventually the business name was sold in 1982. Racing success In 1967 Rex Butcher (Dunstall's shop manager and regular rider) - supported by Motor Cycle (a UK weekly publication) journalist David Dixon on a second machine - set a number of world records on 750 cc Dunstalls at Monza in Italy, using two machines earlier ridden by Paul Smart (2nd place) and Griff Jenkins (11th place) in the 1967 TT Production race 750cc category (both recorded as 'Norton' in official race result website). In his 13 September 1967 Motor Cycle article, Dixon reported both bikes were the same production TT race specification with lighting and (road-legal) megaphone-style silencers but had been stripped, checked and re-built, with special preparation being limited to larger six-gallon petrol tanks, modified racing seats, improved fairings from the forthcoming 1968 range and 45 psi tyre pressures. The object was to use two over-the-counter customised bikes, basically the same as could be bought. During the 1968 British season, Motor Cycle (11 December 1968) cites Dunstall rider Ray Pickrell as securing 17 1st places This total may include the titles 'Master of Mallory' and 'King of Brands' as 'extra' races (having an aggregate result from two legs) due to Dunstall's 1969 catalogue stating 14 wins for 1968 season The 1968 catalogue shows race images of Ray Pickrell aboard lowboy race frames for open category, with production classes on Featherbed framed 750 Dunstall Domiracers. In June 1968 Pickrell won the Isle of Man Production TT race 750 cc class entered on a 'Dunstall Norton Dominator' with a new lap record (average speed) of . In October 1969, when anticipating a future challenge at the Monza high-speed, banked-oval circuit of a record held by Moto Guzzi, to