MAC 4 to 1 exhaust (Canister Style) with stock airbox questions

[750slasher]

I am looking at getting a MAC 4 to 1 exhaust (Canister style) for my CB750C street fighter style build.

Just a few questions (I did a search but found nothing for my situation, if so, please attach a link for post).

For the exhaust I want (Mac 4 to 1 canister style) with STOCK airbox, would rejetting be needed? If so, recommendations?

OR would the engine just need "tweaked" in for the new exhaust?
PLEASE CORRECT ME IF IM WRONG: If the new exhaust was installed but the airbox remained the same, there would be more flow on exit thus causing more air (on a small scale, due to the stock airbox, to be sucked in), this would cause more of a LEAN condition and I would adjust my fuel for more gas. AM I thinking right or way wrong?

Anyone run a 4 to 1 MAC exhaust with stock airbox? Any help would be awesome.

 

[750slasher]

So no one has input?

 

[dirtdigger]

Probably wont make a difference as long as the stock air box is used. Most problems with the CV carbs come from people changing jetting along with ditching the stock air box.

 

[750slasher]

Probably wont make a difference as long as the stock air box is used. Most problems with the CV carbs come from people changing jetting along with ditching the stock air box.

Thanks for the input!

 

[750slasher]

Anybody else have any opinions on this question? Just want multiple peoples take on this

 

[SeattleRod]

I just changed my original 4 into 4 exhaust on my -80 750 custom with a Delkevic 4 into 1 exhaust with stock airbox.
After the swap, I did a vacuum sync and there was minimal adjustment needed.
The bike runs and sounds great.

 

[750slasher]

I just changed my original 4 into 4 exhaust on my -80 750 custom with a Delkevic 4 into 1 exhaust with stock airbox.
After the swap, I did a vacuum sync and there was minimal adjustment needed.
The bike runs and sounds great.

Great info! Thanks!

 

[750slasher]

***Update***
Installed the MAC 4 to 1 canister style exhaust. Install was perfect, fitment perfect, quality top notch and the bike rides smooth.....no issues to report!

 

[Wez_]

Glad to hear the progress. Got a video of the sound?

 

[Skelee]

Mine has 4 to 1 and stock air box. Runs fine.