Hi Andy,

I fitted the Akro system & DNA filters (stage I & II) at the same time. The machine definitely breathes more deeply now, and barks much louder (induction roar & exhaust growl in harmony) it has however accentuated the fuelling issue. The 2-1 doesn't have a lug for an O2 sensor, so I'm using an O2 eliminator mod at the moment (there is a Power Commander V with a 2 position MAP switch in a box in the garage) until I can get the bike dyno-tuned. Kev (the maker of the Kev mod) has been helpful in finding a local bike dyno-tuner.

The 660 pops & crackles & back-fires a lot more now (but I quite like it...) and the kids love the fact that blue flames come out of the exhaust when I get home after the evening commute. I am hoping that a new fuel map will fix this when I can get the bike to the dyno...

(My 6 year old made me use that smilie!)

As far as keeping up with the Enduro bikes, I reckon it's partly the weight (it's very tiring after awhile) and maybe the soft (stock) suspension. I find it's great fun for awhile, the torquey nature of the bike makes it very satisfying to punt through the bush, but then fatigue sets in and it's bye bye Huskys & KTMs.

The Akro does save a great deal of weight, I couldn't quite believe how heavy the stock pipes were when I took them off. The handling of the bike is quite different now with less weight over the arse. Clearance is also better, and there have been a number of occasions in a wash-out or rut when I would have damaged the stock pipes, rather than simply scratched the OTR bash plate...

Next mods will be a fly screen for road rides & to get the suspension sorted (Ohlins?). After that with the fuelling sorted through the Power Commander V that will be a just-right light ADV bike.