45 or 50mm exhaust

Bitza · 15-12-2019, 02:18 PM

Hi all, has anyone out there experience of tuned 1078 2v exhausts? While I understand that using a standard M1000s 40mm exhaust will be over-restrictive, so going to 45mm dia (+25%) is a no brainer, but its been suggested to me that 50mm (+50%) would be better for max power. As my bike is primarily a road bike I was wondering if 45 might be better for mid-range, even if there was a loss around max revs/power. All thoughts welcome Bitza.

15-12-2019, 02:18 PM	#1
Bitza Bronze Member Join Date: Jul 2006 Location: Poole Bike: M900ie Posts: 470	45 or 50mm exhaust Hi all, has anyone out there experience of tuned 1078 2v exhausts? While I understand that using a standard M1000s 40mm exhaust will be over-restrictive, so going to 45mm dia (+25%) is a no brainer, but its been suggested to me that 50mm (+50%) would be better for max power. As my bike is primarily a road bike I was wondering if 45 might be better for mid-range, even if there was a loss around max revs/power. All thoughts welcome Bitza. __________________ Bitza