It was found with these bikes that when they switch between open and closed loop fuelling, it produced a lean condition causing the bike to surge.

So, a fuel mod was introduced to richen up the bike to lessen the surging which worked.

However, it was discovered on newer bikes that when you disconnect the O2 sensor it caused further problems as the bikes ecu when in closed loop mode switched from lean to rich on the fly causing surging once again and although there was an O2 eliminator which plugged into the open socket left by the removed O2 sensor, it didn't help matters. In the end it only acted as an aide to prevent a warning light and error code when the sensor is disconnected.

We have been trialling another mod which prevents the bike from going into closed loop allowing for the fuelling to be complelety adjusted and mapped according to the riders wishes.

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09 XT660X:

CCC Stainless Rounds, Stage 1 DNA, Stage 2 DNA, PCV With Custom Autotune Map, PCV AutoTune, Home made O2 eliminator, Self machined Fork Spacers, DIY Autotune Switch.