I have a Nighthawk 250 model 1993. I have the problem that the oil not rise to the cam lobes of left cylinder. My actions: 1. Change the oil pump to a new one. Works fine 2. Check the little orifice on motor to connect the right cylinder oil channel to the left. Is OK

The right cylinder received a very good flood of oil on the head and cramshaft.

Any idea? Thanks


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