The biggest surprise I have had with my Seeley 850 is that it is fast enough to be competitive against 1100cc methanol-fuelled Honda CB750s. I never expected that and that is why the bike stat un-raced for 20 years. The motor in my bike has got almost nothing done to it except for a 2 into 1 pipe and methanol fuel. Most of it's advantage has come from it's steering geometry. It turns quicker and under most other bikes, so I almost always have the run on them. I only found that advantage by accident. I never run wide in corners, stand the bike up and indulge in a drag race down the next straight. Commandos are not good for that.