Was putting the stock pipes back on my 748 for MOT and decided to take off the whole system to clean it up. The lower pipe (ie the one that runs from front cylinder under crankcase) has a couple of dents maybe an inch long and up to 1/2 inch depressed on bottom. Will this significantly affect performance?
no it wont bother it. I have flattened mine and it doesnt affect the power. obviously if it gets worse then youll need to get it beaten back to shape or replace it.