warp9.9
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Ok its to bad the old owner did not give you the tune boy password and the gear he got with it. yes you can use the diagnostics on tune ecu to check faults. If it was the multi-trim software you might find it impossible to copy the tune in it do to software anti hacking computer stuff. That being said you might have to load a tune close to what you have to be able to have full tuning capability. Now if it was the older version tune boy you should be able to copy it.I purchased the bike with the tuneboy maps already loaded and got the tuners details from the previous owner who also sent me the information as to what had been already done. I then contacted the the tuner to ask what I should purchase for future fault finding if required as I live in a remote area ,I was told Tune ECU would be fine diagnosing which is all I want to do.
I did use Tune ECU to change out the TPS - balanced throtle bodies before doing and test road but still had original fault ie slow return to idle when riding.Now runs like pig as described earlier just of idle to about 5% throttle.
now odes your original fault throw a engine light or code?