After having my 4 mil serval, I wouldn't want to do anything else for trail riding... I have really small tight trails with all kinds of shit you have to slow climb over and my serval does amazing on it... When had my stock carbs and t5 pipes on it I could walk through the trails in 3rd gear and not be in the power band... Servals are great trail motors
The stock break line will still work with a +6 swingarm... Are you looking for stock carrier or roundhouse? My cousin has a +5 stock carrier swingarm he has been talking about selling
Damn I went to modify tho post, but my premium membership expired, damn it... Anyhow I was going to add to it that I have 0 experience with oof pipes, just saw no one said grr so I decided to throw those out there