stray dog
Junior Member
...With the combination of high flow air filter and nasty loud exhaust which has little if any back pressure you may have already found the culprit...
+1
What exhaust do you have? Loud & Nasty is different to everybody
If anything like straight pipes you don't have the back pressure to keep fuel mix in while valves are in overlap and you will be loosing power in low and mid range. Not to mention difficult to tune.