The Ace 904S Thruxton Special is a special edition of the Triumph cafe racer, a collaborative effort with Ace Cafe, Stonebridge Motor Company and T3 Racing.
Celebrating Hinkley Triumph’s 20th anniversary, the Ace 904S Thruxton Special melds the Trumpet’s vintage café looks with higher-performance kit. The 904S features upgrades can’t be had commercially as aftermarket accessories, but were instead developed specifically for the Ace Thruxton over a two-year development program.
Changes start with the engine, where the 865cc Parallel Twin gets bored out to its namesake 904cc displacement. Other tuning tricks include high-lift cams, and a polished/ported cylinder head. The faux carburetors, which have adorned the Triumph Classics line since the 2009 model year, hide conventional fuel injection, but the folks at T3 Racing have tinkered with the FI innards, modded up to 39mm (from 36mm) and utilizing T3’s own butterfly valves.
A handmade stainless steel exhaust rounds out the modified powertrain package, and as Ace’s PR promises dual mufflers “ensure an authentic and very British sound.” Peak power claims are 80 horsepower and 60 lb-ft of torque measured at the rear wheel. These rear wheel figures are made all the more impressive considering Triumph’s own claims for the stock Thruxton (68 hp and 51 lb-ft) are measured at the crank.
The Ace 904S Thruxton Special features cafe looks with modern flair, like the electronic dash and quickshifter from HM Quickshifter. The engine and brakes also get serious performance updates, the Nitron suspension fully-adjustable front and rear.
The original Ton-up Boys would likely find the 904S’s electronic dash peculiar. Developed by HM Quickshifter, the digital display includes speedo and tach, the engine redline having been raised to 8500 rpm. A gear position indicator is also present, as well as programmable shift lights, the Thruxton making use of an HM Quickshifter to navigate the five-speed gearbox.
Chassis upgrades include a complete overhaul of the suspension components via the Oxford-based firm Nitron. Up front an inverted 53mm fork, with nitride coated stanchions, replaces the 41mm conventional Kayaba unit on the stock bike. Instead of pre-load only adjustment, the Nitron fork offers three-way adjustment. Out back Nitron’s dual rear shocks offer four-way adjustment (high/low-speed compression, rebound and preload), as well as adjustment for ride height.
Braking gets beefed up as well, with dual 320mm discs up front, opposed to the single front on the stocker. These wave rotors get pinched by radial-mount six-piston monobloc calipers from ISR, which replace two-piston Nissin calipers. And the Ace 904S screeches to a halt on upgraded rubber too, shod in Michelin Power One tires on 17-inch wire-spoked wheels.
Airbrushed Ace Café logos anchor the styling on the specialty Thruxton. Darren Horton Designs paints the racy white, grey, black colorway – though choice of color scheme, anodizing and wheels can be modified by order request. As for exclusivity, each 904S is numbered, with the special edition run limited to just 15.
As expected a special edition bike such as this comes with a special edition price at £17,000, which we won’t even attempt to convert to dollars, on purely demoralizing grounds both for our nation and our own personal pauperism. Better to dream it’s $17K…