Ian_B wrote:
The bike is standard and so I'm thinking thats a whole 45bhp or 22.5bhp each as was pointed out above.

If only, the mc28 in stock form made 40bhp. The best thing you can do to "fix" that is replace the pipes with some that haven't got massive washers in the headers;

The top one is an mc21 pipe, the bottom one is an mc28, click the pic for a bigger, more horrifying look at the problem.

That's the main problem, dyno chart here with a stock mc28 and later with nothing done except the pipes swapped for some Tyga ones.
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