I know more exhaust question

[DIRTY DOG]

building a 2 into 1 set up with 1.5 main tubes my question is what what size collector pipe 1.5 1.75 2.00 ??? I had a street 2 into 1 that has a 1.5 out let it just looks too small. would it breath better with a 1.75 or 2.00 or is there a reason it's 1.5 ??



ps' I forgot it's a 680cc 277 rephase vm36 2into 1 intake hardtail bobber

 

[TwoManyXS1Bs]

If you squash down a 2.5", a pair of 1.5" may just fit in there...

 

[mike waite 3]

I have a sx650 custom 1979just bought original best way to fit and what parts will I need thanks

 

[racerdave]

I have a sx650 custom 1979just bought original best way to fit and what parts will I need thanks

What are you asking?? Your ?? doesn't make much sense.