Curious how cruddy it would run.[&o]

 

You could always do it in stages. See if you can tune the bike to the SS2R's. I read on a thread here by R1000, (a very hands on rider)that the existing needles could be shimmed to open them up.

When I first got my bike, it had the orig. 4to2 header witha set of Cobra slip-on glass paks. The sound was too loud for me but the power band was fine. As far as I could tell, it had orig. needles. (The member I sold them to installed them without needle change and is delighted with them)

I switched out to the V&H S-Sport 4to1 and Stage 1 Dynojet needles, a full tune and CarbSync. Nice aggressive tone, but the annoying 5K rpm flat spot started.
I also noticed that the fuel milage suffered noticably, (open the gate and more fuel pours in, right?)
Not sure how critical all that is to you. Just something to think about.

 

Thanks for your help.I'm going a little nuts trying to decide which direction I'm going to go[:@]

 

Call V&H and ask for a jetting recommendation. They want your bike to run right with their pipe or you'll bad mouth their products!

 

A couple of months ago I tested a stock-jetted bank of carbs on my V&H equipped 1990 (K&N filter too) and it barely ran. I would do the pipe, filter, and jetting all at the same time.

 

I ran that system on my 88. I originally jetted up to 126, but ended up going back to stock as they caused a stumble... Ran fine for years at stock jetting.