Did you mean to say Honda? coz I'm confused...sakibomb said:
Adjusting float level in any way other than spec will give you more running problems. Have you given it a solid ride at speed and looked at the plugs yet? That would be a more accurate plug reading. A quickie around the block isn't enough to guage the plugs on.
If you respect your mate, tell him it needs carb kits before you sell it to him