Full blown goodness | Brit bike specialist builds supercharged Triumph Speed Twin in just four days

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As retros go, Triumph’s Speed Twin is arguably at the sportier end of the spectrum than some, but with just 99bhp turning its back wheel, the Hinckley classic is unlikely to set any records. 

Enter the ‘Super’ Speed Twin. A supercharged one-off creation by Bristol based Triumph specialist, Martin Motorcycle Co (MMC), built in just four days for the Bike Shed London Show

Power up 

Torque is claimed at 116 ft-lbs and peak power is said to be knocking on 160bhp – not bad for a parallel twin roadster!  

Rear three quarter shot of the custom Speed Twin

“I’ve wanted to create a muscle bike for some time now,” said Alex Martin, managing director of MMC.  

“I got a call asking me if I wanted to come to this year’s Bike Shed Show. I didn’t actually have anything built when they asked so I ended up working 7am until midnight, four days straight with the help of one of our technicians, just to get it finished. 

“The first time we got it started wasn’t until 11:00 the night before the show,” Martin added.

Front three quarter shot of the custom Speed Twin

The £4824 (plus VAT) Rotrex C15-60 supercharger MMC used was sourced from TTS Performance and is said to give “fantastic throttle response and acceleration”.  

Rushed perfection 

Boosted power isn’t the only thing that makes this Triumph special however, and whilst the custom Triumph was turned around in record time, it’s nonetheless finished to perfection, even down to the small accents like MMC badging on the engine cases. 

MMC fabricated a custom stainless-steel exhaust for the special build, had the tank and bodywork panels finished in an ultra-trick ‘ghost fade’ paintjob, fitted uprated YSS rear shocks and specced the front forks with Ohlins internals and DLC coated stanchions to give the Triumph the handling to match its newfound thrust. 

'Forced induction' graphic on seat unit of the custom Triumph

Martin also modified the rear subframe, cutting the rear pegs off and shortening the back end. He also powder coated various parts throughout, including the swing arm and supercharger (finished in black to compliment the stealthy aesthetic throughout), added a custom front headlight assembly and to top the build off, added a smattering of carbon fibre here and there to cut unnecessary weight. 

“The plan was always to build a really nice road legal muscle bike as opposed to an out and out custom which can end up almost unrideable sometimes,” Martin said. 

“And that’s exactly what this is, we haven’t compromised the rideability at all, you could pop to the shops on it or ride it literally anywhere.” 

Front three quarter shot of the custom Speed Twin

Future builds 

Interest in the bike has reportedly been high, with various people reportedly contacting MMC to try to buy it – even though this one isn’t for sale. “I’d definitely build another if the interest is there though, so that’s something for the future,” Martin added. 

Top shelf knowledge

Martin is a dab hand when it comes to bike building, having been in the trade for 18 years now. He previously worked alongside a British Superbike team building race bikes and has since built several customs over the years.