Guy Martin in the Division C (streamlined motorcycle) category, the Triumph Rocket Streamliner is 25.5 feet long, powered by two turbocharged, methanol fuelled, Triumph Rocket III engines, enclosed in a carbon Kevlar monocoque. A documentary about the attempt was made for Channel 4. His August 2015 crash at the Ulster GP caused the attempt to be postponed until September 2016. Martin's quest to set a new two-wheeled world land speed record was called off due to conditions on the course. The attempt, on the purpose-built 400 mph motorcycle, suffered a number of setbacks at the track at Bonneville Salt Flats, in Utah,
Triumph Speed Four and other minor concessions to its streetfighter style; the frame and fully adjustable suspension are race-ready. The engine is a 599 cc inline-four-cylinder engine, as used in the TT600. The bike has a top speed of and a time of 4.5 seconds. "Motorcyclist" tested the 2002 Speed Four's time at 11.65 seconds @ and time at 3.71 seconds. The Speed Four was voted No.1 for handling and suspension in "Ride" magazine's 2008 Rider Power Survey. The Triumph Daytona 675 was second in the same category. Triumph UK After Sales has confirmed that 4,606 Speed Fours were produced from 2002 through