Further to my previous review, I have indeed put my money where my mouth is. Having ridden a 2013 T100 Bonnie across Route 66 I came home to UK and looked for one. I bought a very low mileage 2009 SE 865. What a brilliant bike. It had been used for all year commuting in London, and the weather had taken a toll on the finish on the alloy wheels, but everything else was ok. I rode it standard for a bit, went 2-up touring in France, came home and decided that Bonnies should be messed with. So off came the Air Injection System, out came the airbox baffle, off came the airbox intake snorkel (replaced with a Triumph Twin Power TTP bellmouth), off came the exhaust and O2 sensors (replaced with an Arrow replica from ebay), out went the standard air filter (replaced with a Pipercross filter.) I also used the TuneECU program to re-map the ECU. What an amazing difference! It now sounds brilliant. Not in a mid-life crisis Harley kinda way, just sounds like a British twin should. The performance is so much better now that the EU emissions rubbish is ditched. Dyno shows it's kicking out just over 80hp at the wheel. Much more torque too. Vast improvement over the standard 65hp, for only a cost of £200 after I sold all the standard bits I took off. Highly recommended. I can't praise this bike enough. 7000 miles in 4 months, and I'm getting to know it better. If you've got one and want to improve it, speak to Triumph Twin Power. (Google it) They really know their stuff. Easy riding!