DNA filter install

[motardman]

If you have pipes running the DD1200 with the DB killers in place works better for closed loop running. Closed loop
control on Motorcycles with their short exhaust pipes combined with a free flowing set of slip ons and running at lower rpms is usually way too rich. This has everything to do with atmospheric air reversion into the exhaust pipes at lower rpms. Basically reversion allows the o2 sensor to be exposed to too much air, it senses lean because the lambda probe cannot tell the difference between reversion air and oxygen left over during the combustion process. DB killers reduce reversion air more than anything else beneficial they do.

If you still have stock pipes and catalyzer...well that just may be too rich in terms of mapping or Ag/r target values.

That's wise words Micah, makes perfect sense, I'd never thought of it that way.....now I wish I'd bought the arrows instead of the Leo's even though I love the full carbon. I wonder if the Arrows Y pipe with the cats would fit with the Leo's and if they sell it separately?

[Chris09]

Got the 10,000 klm service done today and stg 2 dna put in same time by sean at Brisbane aprilia (Springwood)
Man, night & day difference! Breathes heaps better!