2005 Yamaha XJR1300 Dyno and carb set-up
A 2005 Yamaha XJR1300 was bought in by its owner; he’d fitted cans and noticed it was running a bit rough. In the later years of this model (and this is the carb’d bike) Yamaha fitted emissions equipment like secondary air injection to get it through the testing. To be fair, it created a lash-up, made much worse by the addition of things like free-breathing exhaust cans.
We started by blanking off the secondary air and adjusted the airbox itself as they’re quite restrictive. We then fitted FJR inlet rubbers as they have a bigger diameter than the stock XJR items, then added a K&N filter and corrected the fuelling on the needle and pilot jets.
And Bob’s your uncle! Power rose from just shy of 100bhp to 110bhp, with much nicer throttle response all-round.
Getting this engine through emissions testing didn't help it in the long run...
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.
