I'm not complaning about my PC5 I'm very happy with the way my bike runs since Mark at Serco dyno'd it. 136.97 horse power and 154.61 ft-lbs with standard airfilter, standard headers and a single muffler. I just don't understand this ECU stuff. When it ran like crap from new, surging and hunting at low revs in 1st and 2nd gear corners and backfiring through the intake when you give it a rev on the down shift to the extent of stalling. I took it back to Springwood they said the standard ECU could only have one of three different tunes loaded into it standard, tors, or European. They loaded the Tors tune in it and it made it worse to ride. There final word was they all run like that if you want to get it better you need a PC5 and a dyno so thats what I did. Now today 2years later the same shop tells me the standard ECU is much better than a PC5 and I wasted $400.00 I'm thinkin there all talking through there arse.
On a happier note Iv'e been thinking about getting triple filters, would be interesting to get it dyno'd by Fred to get a comparison with standard headers and single muffler and Mittzy's Reband pipes.