[GSFR750]

What is the pipe diameter for a Yosh header for a 90 750? I've got a full Yosh system on my bandit 600 (96) and I'm trying to figure out if they are going to bottleneck the engine. Unforunately, I know a Gsxr system won't fit so I may have to go with a Bandit 1200 system.

 

[TSAVO5150]

Just went out in the shop and mic'd it,1.625 inches OD on my Duplex.

 

[GSFR750]

Thanks. I forgot, I should probably get the collector outlet diameter too.