Quote:
Originally Posted by Kedishen
Its clearly not the original head on the bike as it has 2KF stamped into it and the frame is 4PT.
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Pretty well all XT600/ TT600 heads from 2KF/ 3AJ teneres onwards have letters 2KF cast into head. Same head casting was used through to the end in 04 with only very minor differences over the years. Likely you do have original head.
The blackness on the secondary venturi likely caused by poor sealing of inlet valve so you get small amount of exhaust blowing back into the carb venturi when at light throttle/ no second venturi open. Most engines that have a few miles under the belt will have that.
Have you inspected both carb needles? Both on 3rd clip from top? regardless based on your oil consumption, it is time to rebuild top end and go from there.
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