Quote:
Originally Posted by
steven660
Also allowing the bike to breath more and adjusting the fueling shouldn't increase the emissions. If it's done properly you should get a more complete burn.
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That isn't true I'm afraid,the emissions test for manufacturers is a bit like sitting an exam when you already know the answers.
It's done at 4250 revs or close so the manufacturers cheat by starving the engine of fuel,less fuel less emissions and hence why all modern day engines have a flat spot.
Where the extra performance comes from is filling that flat spot with fuel and hence the increase in performance and of course emissions,all of which is a minor detail really there's an emission test for diesels which can be got around,I wouldn't be loosing any sleep about such on an XT.