Reply To: Leo Vince LV-10 and De-Cat Fitted. November 3, 2018 at 9:26 am #2621 ZwillisParticipant The cat is the heaviest part. Cat is about 6.5kg which includes the side panels that hide the Cat, the exhaust weighs in at 4kg. I’ve been riding more this week and really enjoying the difference in the bike. The ECU is adjusting to the new system and becoming really lively.