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[BobbyMax]

Hi all I have a 1275 with +30 rebore, hif44, RC40 and LCB. its running a KC286 cam and im pretty sure the heads had some work done to it. Electronic ignition fitted. My AFR Runs around 13.7 to 14.5 at around 1300rpm but after that on higher revs or under load It gets quite lean, Infact sometimes off the afr scale.
Anyways, the needle I have is clearly not letting enough fule through under load or on acceleration.

All suggestions as to what needle to try next would be a great help.
ThankAll
Bobby