I agree with Kev.

There is a very noticable power dip below 4000 RPM.

The low end RPM range is getting way to little fuel. Fix that and you will pick up a lot more torque at the low RPM ranges.

The gains at the low end might even carry over and give you another HP or so at the top end.

What altitude is this dyno?

With the mods you have in there, the HP is a bit low.

It migth be becuase you used a knobbly tyre.

If you did the dyno with slicks, then the HP output is actually very low. It should be around the 55HP mark easy with slicks and the mods you run.

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