Yoshimura

Since Yoshimura Motors was founded in Fukuoka, Japan in 1954, Hideo ‘Pops ‘Yoshimura, an aircraft mechanic in the war, went about engine tuning his own way. He soon earned a stellar reputation among the American GIs based in Japan, blessing their BSAs with extra horsepower, and soon enough the Yoshimura name was racing – and winning – races like the legendary Daytona 200.
Yoshimura has had a long and productive relationship with Suzuki, but every exhaust system, end-can or performance part that Yoshimura produces for every bike is the result of countless hours of R&D, both on the racetrack and in the Dyno room. Pops passed away back in 1995 but his son Fujio has carried on his philosophy and is similarly driven by the performance of his company, and his products.
The range of exhaust end-cans and full systems from Yoshimura is comprehensive; from fully road legal EEC-approved to full race. All come in a range of finishes with a guarantee of quality and performance – which is what the name Yoshimura stands for.
Bike File
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2010 Triumph Sprint ECU Reprogram
The issues with this bike mainly concern power and power delivery off the bottom especially two-up. It’s been back to the dealer and had the latest factory tune, but the owner wants a little more. First job? Isolate the Lambda sensor and cap off the emissions unit. The bike was then put on the Dyno and we reprogrammed the stock ECU; fuelling at the bottom end has been richened up, taking away the ‘hunting’ snatchiness. Fuelling all the way through the rev range has been optimized and the ignition curve trimmed.
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2009 Yamaha R1 Road to Race
To upgrade to race spec we’ve fitted an Öhlins rear shock and MCT have modded the front forks. The engine’s been out and we’ve adjusted the cam timing, ported and skimmed the cylinder head and we’re fitting a set of BSD Performance adjustable bellmouths. It’s also having a YEC race loom and ECU, plus quickshifter.
News
- KTM 990 Adventure full ECU remap 15 Feb 2012
- Grey import Honda CL400 service and MOT 9 Feb 2012
- Honda CB1000R Power Commander PC V and 02 Eliminator Kit fit and Dyno set-up 7 Feb 2012
- Honda Hornet 600 racebike pre-season Dyno shakedown 2 Feb 2012
- Suzuki GSX-R600 trackbike Cordona PQ8 quickshifter upgrade 31 Jan 2012







BSD 848/1098/1198 Crash Bungs
BSD GSX-R1000 Swingarm Eccentrics
BSD GSX-R Adj. Cam Sprockets 