Brett ran it up again and there was an improvement at low throttle and power was up to 60.9hp at peak revs . Back into the laptop for more tweaking ; a bit more fuel here , a bit less there . Another ten minutes waiting for the map to be written to the ECU . This next map didn ’ t work as well as the first , we ’ d gone too far with extra fuel . Into the laptop again for some fine tuning . Another ten minutes for the upload . This time the results were better still . 63.2hp at the ( wildly bouncing ) rear wheel , up from 57.8hp , and healthy 66.8Nm ( 49.3lbft ) of torque .
Contact : Brett Roberts at BRM Dyno More info : BRM Dyno Paeroa
SOME SORT OF SALVATION At this point I was running late for getting back to Rotorua and it was way beyond Brett ’ s normal closing time , so that was the end of play . A quick run up and down the road showed the low rpm throttle response to be much improved , particularly at tickover . The bike now pulls away from a standstill just using the clutch , something it would never do before , and the throttle is less sensitive and doesn ’ t surge at a cruise . It ’ ll also wheelie off the power alone at full throttle in the lower gears . I ’ ll report back once I ’ ve done some more riding to what it ’ s like in hard terrain and if there ’ s any difference in fuel economy .
54 KIWI RIDER